avio: avio_ prefix for url_fseek

Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>

90 files changed, 352 insertions, 347 deletions

diff --git a/libavformat/4xm.c b/libavformat/4xm.c
index bf2d7384b5..2757e89269 100644
--- a/libavformat/4xm.c
+++ b/libavformat/4xm.c
@@ -106,7 +106,7 @@ static int fourxm_read_header(AVFormatContext *s,
     fourxm->fps = 1.0;
 
     /* skip the first 3 32-bit numbers */
-    url_fseek(pb, 12, SEEK_CUR);
+    avio_seek(pb, 12, SEEK_CUR);
 
     /* check for LIST-HEAD */
     GET_LIST_HEADER();
@@ -322,12 +322,12 @@ static int fourxm_read_packet(AVFormatContext *s,
                 fourxm->tracks[track_number].audio_pts += audio_frame_count;
 
             } else {
-                url_fseek(pb, size, SEEK_CUR);
+                avio_seek(pb, size, SEEK_CUR);
             }
             break;
 
         default:
-            url_fseek(pb, size, SEEK_CUR);
+            avio_seek(pb, size, SEEK_CUR);
             break;
         }
     }
diff --git a/libavformat/aiffdec.c b/libavformat/aiffdec.c
index 7b3d1e7297..b8e4ea28ed 100644
--- a/libavformat/aiffdec.c
+++ b/libavformat/aiffdec.c
@@ -152,7 +152,7 @@ static unsigned int get_aiff_header(AVIOContext *pb, AVCodecContext *codec,
 
     /* Chunk is over */
     if (size)
-        url_fseek(pb, size, SEEK_CUR);
+        avio_seek(pb, size, SEEK_CUR);
 
     return num_frames;
 }
@@ -276,7 +276,7 @@ got_sound:
         st->nb_frames * st->codec->frame_size : st->nb_frames;
 
     /* Position the stream at the first block */
-    url_fseek(pb, offset, SEEK_SET);
+    avio_seek(pb, offset, SEEK_SET);
 
     return 0;
 }
diff --git a/libavformat/aiffenc.c b/libavformat/aiffenc.c
index de88382e67..150f36bdc0 100644
--- a/libavformat/aiffenc.c
+++ b/libavformat/aiffenc.c
@@ -126,19 +126,19 @@ static int aiff_write_trailer(AVFormatContext *s)
 
     if (!url_is_streamed(s->pb)) {
         /* File length */
-        url_fseek(pb, aiff->form, SEEK_SET);
+        avio_seek(pb, aiff->form, SEEK_SET);
         avio_wb32(pb, file_size - aiff->form - 4);
 
         /* Number of sample frames */
-        url_fseek(pb, aiff->frames, SEEK_SET);
+        avio_seek(pb, aiff->frames, SEEK_SET);
         avio_wb32(pb, (file_size-aiff->ssnd-12)/enc->block_align);
 
         /* Sound Data chunk size */
-        url_fseek(pb, aiff->ssnd, SEEK_SET);
+        avio_seek(pb, aiff->ssnd, SEEK_SET);
         avio_wb32(pb, file_size - aiff->ssnd - 4);
 
         /* return to the end */
-        url_fseek(pb, end_size, SEEK_SET);
+        avio_seek(pb, end_size, SEEK_SET);
 
         put_flush_packet(pb);
     }
diff --git a/libavformat/anm.c b/libavformat/anm.c
index 6bcb90db1a..463beee345 100644
--- a/libavformat/anm.c
+++ b/libavformat/anm.c
@@ -143,7 +143,7 @@ static int read_header(AVFormatContext *s,
         goto close_and_return;
 
     /* read page table */
-    ret = url_fseek(pb, anm->page_table_offset, SEEK_SET);
+    ret = avio_seek(pb, anm->page_table_offset, SEEK_SET);
     if (ret < 0)
         goto close_and_return;
 
@@ -192,7 +192,7 @@ repeat:
 
     /* parse page header */
     if (anm->record < 0) {
-        url_fseek(pb, anm->page_table_offset + MAX_PAGES*6 + (anm->page<<16), SEEK_SET);
+        avio_seek(pb, anm->page_table_offset + MAX_PAGES*6 + (anm->page<<16), SEEK_SET);
         url_fskip(pb, 8 + 2*p->nb_records);
         anm->record = 0;
     }
@@ -209,10 +209,10 @@ repeat:
 
     /* fetch record size */
     tmp = url_ftell(pb);
-    url_fseek(pb, anm->page_table_offset + MAX_PAGES*6 + (anm->page<<16) +
+    avio_seek(pb, anm->page_table_offset + MAX_PAGES*6 + (anm->page<<16) +
               8 + anm->record * 2, SEEK_SET);
     record_size = avio_rl16(pb);
-    url_fseek(pb, tmp, SEEK_SET);
+    avio_seek(pb, tmp, SEEK_SET);
 
     /* fetch record */
     pkt->size = av_get_packet(s->pb, pkt, record_size);
diff --git a/libavformat/ape.c b/libavformat/ape.c
index 862ac1a482..657a3d9c49 100644
--- a/libavformat/ape.c
+++ b/libavformat/ape.c
@@ -187,7 +187,7 @@ static int ape_read_header(AVFormatContext * s, AVFormatParameters * ap)
         /* Skip any unknown bytes at the end of the descriptor.
            This is for future compatibility */
         if (ape->descriptorlength > 52)
-            url_fseek(pb, ape->descriptorlength - 52, SEEK_CUR);
+            avio_seek(pb, ape->descriptorlength - 52, SEEK_CUR);
 
         /* Read header data */
         ape->compressiontype      = avio_rl16(pb);
@@ -212,7 +212,7 @@ static int ape_read_header(AVFormatContext * s, AVFormatParameters * ap)
         ape->finalframeblocks     = avio_rl32(pb);
 
         if (ape->formatflags & MAC_FORMAT_FLAG_HAS_PEAK_LEVEL) {
-            url_fseek(pb, 4, SEEK_CUR); /* Skip the peak level */
+            avio_seek(pb, 4, SEEK_CUR); /* Skip the peak level */
             ape->headerlength += 4;
         }
 
@@ -289,7 +289,7 @@ static int ape_read_header(AVFormatContext * s, AVFormatParameters * ap)
     /* try to read APE tags */
     if (!url_is_streamed(pb)) {
         ff_ape_parse_tag(s);
-        url_fseek(pb, 0, SEEK_SET);
+        avio_seek(pb, 0, SEEK_SET);
     }
 
     av_log(s, AV_LOG_DEBUG, "Decoding file - v%d.%02d, compression level %d\n", ape->fileversion / 1000, (ape->fileversion % 1000) / 10, ape->compressiontype);
@@ -342,7 +342,7 @@ static int ape_read_packet(AVFormatContext * s, AVPacket * pkt)
     if (ape->currentframe > ape->totalframes)
         return AVERROR(EIO);
 
-    url_fseek (s->pb, ape->frames[ape->currentframe].pos, SEEK_SET);
+    avio_seek (s->pb, ape->frames[ape->currentframe].pos, SEEK_SET);
 
     /* Calculate how many blocks there are in this frame */
     if (ape->currentframe == (ape->totalframes - 1))
diff --git a/libavformat/apetag.c b/libavformat/apetag.c
index 7252fd2b2c..c3c57717bd 100644
--- a/libavformat/apetag.c
+++ b/libavformat/apetag.c
@@ -74,7 +74,7 @@ void ff_ape_parse_tag(AVFormatContext *s)
     if (file_size < APE_TAG_FOOTER_BYTES)
         return;
 
-    url_fseek(pb, file_size - APE_TAG_FOOTER_BYTES, SEEK_SET);
+    avio_seek(pb, file_size - APE_TAG_FOOTER_BYTES, SEEK_SET);
 
     avio_read(pb, buf, 8);     /* APETAGEX */
     if (strncmp(buf, "APETAGEX", 8)) {
@@ -105,7 +105,7 @@ void ff_ape_parse_tag(AVFormatContext *s)
         return;
     }
 
-    url_fseek(pb, file_size - tag_bytes, SEEK_SET);
+    avio_seek(pb, file_size - tag_bytes, SEEK_SET);
 
     for (i=0; i<fields; i++)
         if (ape_tag_read_field(s) < 0) break;
diff --git a/libavformat/asfdec.c b/libavformat/asfdec.c
index 242f81cd6b..4f6f6f2c0d 100644
--- a/libavformat/asfdec.c
+++ b/libavformat/asfdec.c
@@ -182,7 +182,7 @@ static void get_tag(AVFormatContext *s, const char *key, int type, int len)
         av_metadata_set2(&s->metadata, key, value, 0);
 finish:
     av_freep(&value);
-    url_fseek(s->pb, off + len, SEEK_SET);
+    avio_seek(s->pb, off + len, SEEK_SET);
 }
 
 static int asf_read_file_properties(AVFormatContext *s, int64_t size)
@@ -428,14 +428,14 @@ static int asf_read_ext_stream_properties(AVFormatContext *s, int64_t size)
     for (i=0; i<stream_ct; i++){
         avio_rl16(pb);
         ext_len = avio_rl16(pb);
-        url_fseek(pb, ext_len, SEEK_CUR);
+        avio_seek(pb, ext_len, SEEK_CUR);
     }
 
     for (i=0; i<payload_ext_ct; i++){
         ff_get_guid(pb, &g);
         ext_d=avio_rl16(pb);
         ext_len=avio_rl32(pb);
-        url_fseek(pb, ext_len, SEEK_CUR);
+        avio_seek(pb, ext_len, SEEK_CUR);
     }
 
     return 0;
@@ -654,7 +654,7 @@ static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
         }
         if(url_ftell(pb) != gpos + gsize)
             av_log(s, AV_LOG_DEBUG, "gpos mismatch our pos=%"PRIu64", end=%"PRIu64"\n", url_ftell(pb)-gpos, gsize);
-        url_fseek(pb, gpos + gsize, SEEK_SET);
+        avio_seek(pb, gpos + gsize, SEEK_SET);
     }
     ff_get_guid(pb, &g);
     avio_rl64(pb);
@@ -758,7 +758,7 @@ static int ff_asf_get_packet(AVFormatContext *s, AVIOContext *pb)
         d= avio_r8(pb);
         rsize+=3;
     }else{
-        url_fseek(pb, -1, SEEK_CUR); //FIXME
+        avio_seek(pb, -1, SEEK_CUR); //FIXME
     }
 
     asf->packet_flags    = c;
@@ -1146,7 +1146,7 @@ static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos,
     if (s->packet_size > 0)
         pos= (pos+s->packet_size-1-s->data_offset)/s->packet_size*s->packet_size+ s->data_offset;
     *ppos= pos;
-    url_fseek(s->pb, pos, SEEK_SET);
+    avio_seek(s->pb, pos, SEEK_SET);
 
 //printf("asf_read_pts\n");
     asf_reset_header(s);
@@ -1188,7 +1188,7 @@ static void asf_build_simple_index(AVFormatContext *s, int stream_index)
     int64_t current_pos= url_ftell(s->pb);
     int i;
 
-    url_fseek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
+    avio_seek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
     ff_get_guid(s->pb, &g);
 
     /* the data object can be followed by other top-level objects,
@@ -1196,10 +1196,10 @@ static void asf_build_simple_index(AVFormatContext *s, int stream_index)
     while (ff_guidcmp(&g, &index_guid)) {
         int64_t gsize= avio_rl64(s->pb);
         if (gsize < 24 || url_feof(s->pb)) {
-            url_fseek(s->pb, current_pos, SEEK_SET);
+            avio_seek(s->pb, current_pos, SEEK_SET);
             return;
         }
-        url_fseek(s->pb, gsize-24, SEEK_CUR);
+        avio_seek(s->pb, gsize-24, SEEK_CUR);
         ff_get_guid(s->pb, &g);
     }
 
@@ -1227,7 +1227,7 @@ static void asf_build_simple_index(AVFormatContext *s, int stream_index)
         }
         asf->index_read= 1;
     }
-    url_fseek(s->pb, current_pos, SEEK_SET);
+    avio_seek(s->pb, current_pos, SEEK_SET);
 }
 
 static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
@@ -1265,7 +1265,7 @@ static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int
 
     // various attempts to find key frame have failed so far
     //    asf_reset_header(s);
-    //    url_fseek(s->pb, pos, SEEK_SET);
+    //    avio_seek(s->pb, pos, SEEK_SET);
     //    key_pos = pos;
     //     for(i=0;i<16;i++){
     //         pos = url_ftell(s->pb);
@@ -1286,7 +1286,7 @@ static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int
 
         /* do the seek */
         av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
-        url_fseek(s->pb, pos, SEEK_SET);
+        avio_seek(s->pb, pos, SEEK_SET);
     }
     asf_reset_header(s);
     return 0;
diff --git a/libavformat/asfenc.c b/libavformat/asfenc.c
index b181f2321e..267f9b3d49 100644
--- a/libavformat/asfenc.c
+++ b/libavformat/asfenc.c
@@ -260,9 +260,9 @@ static void end_header(AVIOContext *pb, int64_t pos)
     int64_t pos1;
 
     pos1 = url_ftell(pb);
-    url_fseek(pb, pos + 16, SEEK_SET);
+    avio_seek(pb, pos + 16, SEEK_SET);
     avio_wl64(pb, pos1 - pos);
-    url_fseek(pb, pos1, SEEK_SET);
+    avio_seek(pb, pos1, SEEK_SET);
 }
 
 /* write an asf chunk (only used in streaming case) */
@@ -443,9 +443,9 @@ static int asf_write_header1(AVFormatContext *s, int64_t file_size, int64_t data
                 return -1;
             if (wavsize != extra_size) {
                 cur_pos = url_ftell(pb);
-                url_fseek(pb, es_pos, SEEK_SET);
+                avio_seek(pb, es_pos, SEEK_SET);
                 avio_wl32(pb, wavsize); /* wav header len */
-                url_fseek(pb, cur_pos, SEEK_SET);
+                avio_seek(pb, cur_pos, SEEK_SET);
             }
             /* ERROR Correction */
             avio_w8(pb, 0x01);
@@ -530,17 +530,17 @@ static int asf_write_header1(AVFormatContext *s, int64_t file_size, int64_t data
     if (asf->is_streamed) {
         header_size += 8 + 30 + 50;
 
-        url_fseek(pb, header_offset - 10 - 30, SEEK_SET);
+        avio_seek(pb, header_offset - 10 - 30, SEEK_SET);
         avio_wl16(pb, header_size);
-        url_fseek(pb, header_offset - 2 - 30, SEEK_SET);
+        avio_seek(pb, header_offset - 2 - 30, SEEK_SET);
         avio_wl16(pb, header_size);
 
         header_size -= 8 + 30 + 50;
     }
     header_size += 24 + 6;
-    url_fseek(pb, header_offset - 14, SEEK_SET);
+    avio_seek(pb, header_offset - 14, SEEK_SET);
     avio_wl64(pb, header_size);
-    url_fseek(pb, cur_pos, SEEK_SET);
+    avio_seek(pb, cur_pos, SEEK_SET);
 
     /* movie chunk, followed by packets of packet_size */
     asf->data_offset = cur_pos;
@@ -871,7 +871,7 @@ static int asf_write_trailer(AVFormatContext *s)
     } else {
         /* rewrite an updated header */
         file_size = url_ftell(s->pb);
-        url_fseek(s->pb, 0, SEEK_SET);
+        avio_seek(s->pb, 0, SEEK_SET);
         asf_write_header1(s, file_size, data_size - asf->data_offset);
     }
 
diff --git a/libavformat/au.c b/libavformat/au.c
index 9aed1dcaf3..16b33e78c7 100644
--- a/libavformat/au.c
+++ b/libavformat/au.c
@@ -95,9 +95,9 @@ static int au_write_trailer(AVFormatContext *s)
 
         /* update file size */
         file_size = url_ftell(pb);
-        url_fseek(pb, 8, SEEK_SET);
+        avio_seek(pb, 8, SEEK_SET);
         avio_wb32(pb, (uint32_t)(file_size - 24));
-        url_fseek(pb, file_size, SEEK_SET);
+        avio_seek(pb, file_size, SEEK_SET);
 
         put_flush_packet(pb);
     }
@@ -147,7 +147,7 @@ static int au_read_header(AVFormatContext *s,
 
     if (size >= 24) {
         /* skip unused data */
-        url_fseek(pb, size - 24, SEEK_CUR);
+        avio_seek(pb, size - 24, SEEK_CUR);
     }
 
     /* now we are ready: build format streams */
diff --git a/libavformat/avidec.c b/libavformat/avidec.c
index b2db2dc36d..a0f86adea5 100644
--- a/libavformat/avidec.c
+++ b/libavformat/avidec.c
@@ -205,13 +205,13 @@ static int read_braindead_odml_indx(AVFormatContext *s, int frame_num){
                 return -1;
             }
 
-            url_fseek(pb, offset+8, SEEK_SET);
+            avio_seek(pb, offset+8, SEEK_SET);
             avi->odml_depth++;
             read_braindead_odml_indx(s, frame_num);
             avi->odml_depth--;
             frame_num += duration;
 
-            url_fseek(pb, pos, SEEK_SET);
+            avio_seek(pb, pos, SEEK_SET);
         }
     }
     avi->index_loaded=1;
@@ -668,7 +668,7 @@ static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
             if(!url_is_streamed(pb) && !(s->flags & AVFMT_FLAG_IGNIDX)){
                 read_braindead_odml_indx(s, 0);
             }
-            url_fseek(pb, i+size, SEEK_SET);
+            avio_seek(pb, i+size, SEEK_SET);
             break;
         case MKTAG('v', 'p', 'r', 'p'):
             if(stream_index < (unsigned)s->nb_streams && size > 9*4){
@@ -693,7 +693,7 @@ static int avi_read_header(AVFormatContext *s, AVFormatParameters *ap)
                 }
                 size -= 9*4;
             }
-            url_fseek(pb, size, SEEK_CUR);
+            avio_seek(pb, size, SEEK_CUR);
             break;
         case MKTAG('s', 't', 'r', 'n'):
             if(s->nb_streams){
@@ -892,7 +892,7 @@ static int avi_read_packet(AVFormatContext *s, AVPacket *pkt)
         if(i>=0){
             int64_t pos= best_st->index_entries[i].pos;
             pos += best_ast->packet_size - best_ast->remaining;
-            url_fseek(s->pb, pos + 8, SEEK_SET);
+            avio_seek(s->pb, pos + 8, SEEK_SET);
 //        av_log(s, AV_LOG_DEBUG, "pos=%"PRId64"\n", pos);
 
             assert(best_ast->remaining <= best_ast->packet_size);
@@ -1174,7 +1174,7 @@ static int guess_ni_flag(AVFormatContext *s){
 
         if(n >= 2){
             int64_t pos= st->index_entries[0].pos;
-            url_fseek(s->pb, pos + 4, SEEK_SET);
+            avio_seek(s->pb, pos + 4, SEEK_SET);
             size= avio_rl32(s->pb);
             if(pos + size > st->index_entries[1].pos)
                 last_start= INT64_MAX;
@@ -1185,7 +1185,7 @@ static int guess_ni_flag(AVFormatContext *s){
         if(st->index_entries[n-1].pos < first_end)
             first_end= st->index_entries[n-1].pos;
     }
-    url_fseek(s->pb, oldpos, SEEK_SET);
+    avio_seek(s->pb, oldpos, SEEK_SET);
     return last_start > first_end;
 }
 
@@ -1197,7 +1197,7 @@ static int avi_load_index(AVFormatContext *s)
     int64_t pos= url_ftell(pb);
     int ret = -1;
 
-    if (url_fseek(pb, avi->movi_end, SEEK_SET) < 0)
+    if (avio_seek(pb, avi->movi_end, SEEK_SET) < 0)
         goto the_end; // maybe truncated file
 #ifdef DEBUG_SEEK
     printf("movi_end=0x%"PRIx64"\n", avi->movi_end);
@@ -1225,13 +1225,13 @@ static int avi_load_index(AVFormatContext *s)
         default:
         skip:
             size += (size & 1);
-            if (url_fseek(pb, size, SEEK_CUR) < 0)
+            if (avio_seek(pb, size, SEEK_CUR) < 0)
                 goto the_end; // something is wrong here
             break;
         }
     }
  the_end:
-    url_fseek(pb, pos, SEEK_SET);
+    avio_seek(pb, pos, SEEK_SET);
     return ret;
 }
 
@@ -1282,7 +1282,7 @@ static int avi_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp
         /* DV demux so it can synthesize correct timestamps.        */
         dv_offset_reset(avi->dv_demux, timestamp);
 
-        url_fseek(s->pb, pos, SEEK_SET);
+        avio_seek(s->pb, pos, SEEK_SET);
         avi->stream_index= -1;
         return 0;
     }
@@ -1324,7 +1324,7 @@ static int avi_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp
     }
 
     /* do the seek */
-    url_fseek(s->pb, pos, SEEK_SET);
+    avio_seek(s->pb, pos, SEEK_SET);
     avi->stream_index= -1;
     return 0;
 }
diff --git a/libavformat/avienc.c b/libavformat/avienc.c
index c161133342..49585b685b 100644
--- a/libavformat/avienc.c
+++ b/libavformat/avienc.c
@@ -130,7 +130,7 @@ static int avi_write_counters(AVFormatContext* s, int riff_id)
 
         assert(avist->frames_hdr_strm);
         stream = s->streams[n]->codec;
-        url_fseek(pb, avist->frames_hdr_strm, SEEK_SET);
+        avio_seek(pb, avist->frames_hdr_strm, SEEK_SET);
         ff_parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale);
         if(au_ssize == 0) {
             avio_wl32(pb, avist->packet_count);
@@ -142,10 +142,10 @@ static int avi_write_counters(AVFormatContext* s, int riff_id)
     }
     if(riff_id == 1) {
         assert(avi->frames_hdr_all);
-        url_fseek(pb, avi->frames_hdr_all, SEEK_SET);
+        avio_seek(pb, avi->frames_hdr_all, SEEK_SET);
         avio_wl32(pb, nb_frames);
     }
-    url_fseek(pb, file_size, SEEK_SET);
+    avio_seek(pb, file_size, SEEK_SET);
 
     return 0;
 }
@@ -442,7 +442,7 @@ static int avi_write_ix(AVFormatContext *s)
          pos = url_ftell(pb);
 
          /* Updating one entry in the AVI OpenDML master index */
-         url_fseek(pb, avist->indexes.indx_start - 8, SEEK_SET);
+         avio_seek(pb, avist->indexes.indx_start - 8, SEEK_SET);
          ffio_wfourcc(pb, "indx");            /* enabling this entry */
          url_fskip(pb, 8);
          avio_wl32(pb, avi->riff_id);         /* nEntriesInUse */
@@ -451,7 +451,7 @@ static int avi_write_ix(AVFormatContext *s)
          avio_wl32(pb, pos - ix);             /* dwSize */
          avio_wl32(pb, avist->indexes.entry); /* dwDuration */
 
-         url_fseek(pb, pos, SEEK_SET);
+         avio_seek(pb, pos, SEEK_SET);
     }
     return 0;
 }
@@ -601,7 +601,7 @@ static int avi_write_trailer(AVFormatContext *s)
             ff_end_tag(pb, avi->riff_start);
 
             file_size = url_ftell(pb);
-            url_fseek(pb, avi->odml_list - 8, SEEK_SET);
+            avio_seek(pb, avi->odml_list - 8, SEEK_SET);
             ffio_wfourcc(pb, "LIST"); /* Making this AVI OpenDML one */
             url_fskip(pb, 16);
 
@@ -619,7 +619,7 @@ static int avi_write_trailer(AVFormatContext *s)
                 }
             }
             avio_wl32(pb, nb_frames);
-            url_fseek(pb, file_size, SEEK_SET);
+            avio_seek(pb, file_size, SEEK_SET);
 
             avi_write_counters(s, avi->riff_id);
         }
diff --git a/libavformat/avio.h b/libavformat/avio.h
index 613d77d240..568bdd346a 100644
--- a/libavformat/avio.h
+++ b/libavformat/avio.h
@@ -420,6 +420,7 @@ attribute_deprecated void         put_tag(AVIOContext *s, const char *tag);
  */
 attribute_deprecated int url_fopen( AVIOContext **s, const char *url, int flags);
 attribute_deprecated int url_fclose(AVIOContext *s);
+attribute_deprecated int64_t url_fseek(AVIOContext *s, int64_t offset, int whence);
 /**
  * @}
  */
@@ -465,7 +466,7 @@ int avio_put_str16le(AVIOContext *s, const char *str);
  * fseek() equivalent for AVIOContext.
  * @return new position or AVERROR.
  */
-int64_t url_fseek(AVIOContext *s, int64_t offset, int whence);
+int64_t avio_seek(AVIOContext *s, int64_t offset, int whence);
 
 /**
  * Skip given number of bytes forward.
diff --git a/libavformat/aviobuf.c b/libavformat/aviobuf.c
index f53ec562f5..a74ad21604 100644
--- a/libavformat/aviobuf.c
+++ b/libavformat/aviobuf.c
@@ -176,7 +176,7 @@ void put_flush_packet(AVIOContext *s)
     s->must_flush = 0;
 }
 
-int64_t url_fseek(AVIOContext *s, int64_t offset, int whence)
+int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
 {
     int64_t offset1;
     int64_t pos;
@@ -235,13 +235,13 @@ int64_t url_fseek(AVIOContext *s, int64_t offset, int whence)
 
 int url_fskip(AVIOContext *s, int64_t offset)
 {
-    int64_t ret = url_fseek(s, offset, SEEK_CUR);
+    int64_t ret = avio_seek(s, offset, SEEK_CUR);
     return ret < 0 ? ret : 0;
 }
 
 int64_t url_ftell(AVIOContext *s)
 {
-    return url_fseek(s, 0, SEEK_CUR);
+    return avio_seek(s, 0, SEEK_CUR);
 }
 
 int64_t url_fsize(AVIOContext *s)
@@ -365,6 +365,10 @@ int url_fclose(AVIOContext *s)
 {
     return avio_close(s);
 }
+int64_t url_fseek(AVIOContext *s, int64_t offset, int whence)
+{
+    return avio_seek(s, offset, whence);
+}
 #endif
 
 int avio_put_str(AVIOContext *s, const char *str)
diff --git a/libavformat/bethsoftvid.c b/libavformat/bethsoftvid.c
index 40d0e6296a..00b3ea2ae3 100644
--- a/libavformat/bethsoftvid.c
+++ b/libavformat/bethsoftvid.c
@@ -67,7 +67,7 @@ static int vid_read_header(AVFormatContext *s,
     *    bytes: 'V' 'I' 'D'
     *    int16s: always_512, nframes, width, height, delay, always_14
     */
-    url_fseek(pb, 5, SEEK_CUR);
+    avio_seek(pb, 5, SEEK_CUR);
     vid->nframes = avio_rl16(pb);
 
     stream = av_new_stream(s, 0);
@@ -146,7 +146,7 @@ static int read_frame(BVID_DemuxContext *vid, AVIOContext *pb, AVPacket *pkt,
         if(bytes_copied == npixels){ // sometimes no stop character is given, need to keep track of bytes copied
             // may contain a 0 byte even if read all pixels
             if(avio_r8(pb))
-                url_fseek(pb, -1, SEEK_CUR);
+                avio_seek(pb, -1, SEEK_CUR);
             break;
         }
         if(bytes_copied > npixels)
@@ -185,7 +185,7 @@ static int vid_read_packet(AVFormatContext *s,
     block_type = avio_r8(pb);
     switch(block_type){
         case PALETTE_BLOCK:
-            url_fseek(pb, -1, SEEK_CUR);     // include block type
+            avio_seek(pb, -1, SEEK_CUR);     // include block type
             ret_value = av_get_packet(pb, pkt, 3 * 256 + 1);
             if(ret_value != 3 * 256 + 1){
                 av_free_packet(pkt);
diff --git a/libavformat/bfi.c b/libavformat/bfi.c
index 7313e7b337..4d0bd097a9 100644
--- a/libavformat/bfi.c
+++ b/libavformat/bfi.c
@@ -98,7 +98,7 @@ static int bfi_read_header(AVFormatContext * s, AVFormatParameters * ap)
     astream->codec->bits_per_coded_sample = 8;
     astream->codec->bit_rate        =
         astream->codec->sample_rate * astream->codec->bits_per_coded_sample;
-    url_fseek(pb, chunk_header - 3, SEEK_SET);
+    avio_seek(pb, chunk_header - 3, SEEK_SET);
     av_set_pts_info(astream, 64, 1, astream->codec->sample_rate);
     return 0;
 }
diff --git a/libavformat/bink.c b/libavformat/bink.c
index 79c3a25ec5..f76d7b987a 100644
--- a/libavformat/bink.c
+++ b/libavformat/bink.c
@@ -225,7 +225,7 @@ static int read_packet(AVFormatContext *s, AVPacket *pkt)
                     AV_RL32(pkt->data) / (2 * s->streams[bink->current_track]->codec->channels);
             return 0;
         } else {
-            url_fseek(pb, audio_size, SEEK_CUR);
+            avio_seek(pb, audio_size, SEEK_CUR);
         }
     }
 
@@ -251,7 +251,7 @@ static int read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, in
         return -1;
 
     /* seek to the first frame */
-    url_fseek(s->pb, vst->index_entries[0].pos, SEEK_SET);
+    avio_seek(s->pb, vst->index_entries[0].pos, SEEK_SET);
     bink->video_pts = 0;
     memset(bink->audio_pts, 0, sizeof(bink->audio_pts));
     bink->current_track = -1;
diff --git a/libavformat/c93.c b/libavformat/c93.c
index 3e3cd9cb0f..84cf65c73e 100644
--- a/libavformat/c93.c
+++ b/libavformat/c93.c
@@ -140,13 +140,13 @@ static int read_packet(AVFormatContext *s, AVPacket *pkt)
     }
 
     if (c93->current_frame == 0) {
-        url_fseek(pb, br->index * 2048, SEEK_SET);
+        avio_seek(pb, br->index * 2048, SEEK_SET);
         for (i = 0; i < 32; i++) {
             c93->frame_offsets[i] = avio_rl32(pb);
         }
     }
 
-    url_fseek(pb,br->index * 2048 +
+    avio_seek(pb,br->index * 2048 +
             c93->frame_offsets[c93->current_frame], SEEK_SET);
     datasize = avio_rl16(pb); /* video frame size */
 
diff --git a/libavformat/cafdec.c b/libavformat/cafdec.c
index 86f1005fdc..8532946c5c 100644
--- a/libavformat/cafdec.c
+++ b/libavformat/cafdec.c
@@ -292,7 +292,7 @@ static int read_header(AVFormatContext *s,
 
     /* position the stream at the start of data */
     if (caf->data_size >= 0)
-        url_fseek(pb, caf->data_start, SEEK_SET);
+        avio_seek(pb, caf->data_start, SEEK_SET);
 
     return 0;
 }
@@ -377,7 +377,7 @@ static int read_seek(AVFormatContext *s, int stream_index,
         return -1;
     }
 
-    url_fseek(s->pb, pos + caf->data_start, SEEK_SET);
+    avio_seek(s->pb, pos + caf->data_start, SEEK_SET);
     return 0;
 }
 
diff --git a/libavformat/dv.c b/libavformat/dv.c
index 0598607ff4..cdc5f76923 100644
--- a/libavformat/dv.c
+++ b/libavformat/dv.c
@@ -419,7 +419,7 @@ static int dv_read_header(AVFormatContext *s,
         if (state == 0x003f0700 || state == 0xff3f0700)
             marker_pos = url_ftell(s->pb);
         if (state == 0xff3f0701 && url_ftell(s->pb) - marker_pos == 80) {
-            url_fseek(s->pb, -163, SEEK_CUR);
+            avio_seek(s->pb, -163, SEEK_CUR);
             state = avio_rb32(s->pb);
             break;
         }
@@ -428,7 +428,7 @@ static int dv_read_header(AVFormatContext *s,
     AV_WB32(c->buf, state);
 
     if (avio_read(s->pb, c->buf + 4, DV_PROFILE_BYTES - 4) <= 0 ||
-        url_fseek(s->pb, -DV_PROFILE_BYTES, SEEK_CUR) < 0)
+        avio_seek(s->pb, -DV_PROFILE_BYTES, SEEK_CUR) < 0)
         return AVERROR(EIO);
 
     c->dv_demux->sys = ff_dv_frame_profile(c->dv_demux->sys, c->buf, DV_PROFILE_BYTES);
@@ -473,7 +473,7 @@ static int dv_read_seek(AVFormatContext *s, int stream_index,
 
     dv_offset_reset(c, offset / c->sys->frame_size);
 
-    offset = url_fseek(s->pb, offset, SEEK_SET);
+    offset = avio_seek(s->pb, offset, SEEK_SET);
     return (offset < 0) ? offset : 0;
 }
 
diff --git a/libavformat/dxa.c b/libavformat/dxa.c
index 188fc29d63..60ae92a048 100644
--- a/libavformat/dxa.c
+++ b/libavformat/dxa.c
@@ -115,7 +115,7 @@ static int dxa_read_header(AVFormatContext *s, AVFormatParameters *ap)
             c->bpc = ((c->bpc + ast->codec->block_align - 1) / ast->codec->block_align) * ast->codec->block_align;
         c->bytes_left = fsize;
         c->wavpos = url_ftell(pb);
-        url_fseek(pb, c->vidpos, SEEK_SET);
+        avio_seek(pb, c->vidpos, SEEK_SET);
     }
 
     /* now we are ready: build format streams */
@@ -151,7 +151,7 @@ static int dxa_read_packet(AVFormatContext *s, AVPacket *pkt)
 
     if(!c->readvid && c->has_sound && c->bytes_left){
         c->readvid = 1;
-        url_fseek(s->pb, c->wavpos, SEEK_SET);
+        avio_seek(s->pb, c->wavpos, SEEK_SET);
         size = FFMIN(c->bytes_left, c->bpc);
         ret = av_get_packet(s->pb, pkt, size);
         pkt->stream_index = 1;
@@ -161,7 +161,7 @@ static int dxa_read_packet(AVFormatContext *s, AVPacket *pkt)
         c->wavpos = url_ftell(s->pb);
         return 0;
     }
-    url_fseek(s->pb, c->vidpos, SEEK_SET);
+    avio_seek(s->pb, c->vidpos, SEEK_SET);
     while(!url_feof(s->pb) && c->frames){
         avio_read(s->pb, buf, 4);
         switch(AV_RL32(buf)){
diff --git a/libavformat/electronicarts.c b/libavformat/electronicarts.c
index 6179d22e60..9f79897b85 100644
--- a/libavformat/electronicarts.c
+++ b/libavformat/electronicarts.c
@@ -369,10 +369,10 @@ static int process_ea_header(AVFormatContext *s) {
             return err;
         }
 
-        url_fseek(pb, startpos + size, SEEK_SET);
+        avio_seek(pb, startpos + size, SEEK_SET);
     }
 
-    url_fseek(pb, 0, SEEK_SET);
+    avio_seek(pb, 0, SEEK_SET);
 
     return 1;
 }
@@ -536,12 +536,12 @@ static int ea_read_packet(AVFormatContext *s,
         case fVGT_TAG:
         case MADm_TAG:
         case MADe_TAG:
-            url_fseek(pb, -8, SEEK_CUR);     // include chunk preamble
+            avio_seek(pb, -8, SEEK_CUR);     // include chunk preamble
             chunk_size += 8;
             goto get_video_packet;
 
         case mTCD_TAG:
-            url_fseek(pb, 8, SEEK_CUR);  // skip ea dct header
+            avio_seek(pb, 8, SEEK_CUR);  // skip ea dct header
             chunk_size -= 8;
             goto get_video_packet;
 
@@ -560,7 +560,7 @@ get_video_packet:
             break;
 
         default:
-            url_fseek(pb, chunk_size, SEEK_CUR);
+            avio_seek(pb, chunk_size, SEEK_CUR);
             break;
         }
     }
diff --git a/libavformat/ffmdec.c b/libavformat/ffmdec.c
index 1ae1422ea2..764d55c60a 100644
--- a/libavformat/ffmdec.c
+++ b/libavformat/ffmdec.c
@@ -118,7 +118,7 @@ static int ffm_read_data(AVFormatContext *s,
             len = size;
         if (len == 0) {
             if (url_ftell(pb) == ffm->file_size)
-                url_fseek(pb, ffm->packet_size, SEEK_SET);
+                avio_seek(pb, ffm->packet_size, SEEK_SET);
     retry_read:
             id = avio_rb16(pb); /* PACKET_ID */
             if (id != PACKET_ID)
@@ -137,7 +137,7 @@ static int ffm_read_data(AVFormatContext *s,
                 if (!frame_offset) {
                     /* This packet has no frame headers in it */
                     if (url_ftell(pb) >= ffm->packet_size * 3) {
-                        url_fseek(pb, -ffm->packet_size * 2, SEEK_CUR);
+                        avio_seek(pb, -ffm->packet_size * 2, SEEK_CUR);
                         goto retry_read;
                     }
                     /* This is bad, we cannot find a valid frame header */
@@ -178,7 +178,7 @@ static void ffm_seek1(AVFormatContext *s, int64_t pos1)
 #ifdef DEBUG_SEEK
     av_log(s, AV_LOG_DEBUG, "seek to %"PRIx64" -> %"PRIx64"\n", pos1, pos);
 #endif
-    url_fseek(pb, pos, SEEK_SET);
+    avio_seek(pb, pos, SEEK_SET);
 }
 
 static int64_t get_dts(AVFormatContext *s, int64_t pos)
@@ -248,7 +248,7 @@ static void adjust_write_index(AVFormatContext *s)
     //printf("pts range %0.6f - %0.6f\n", get_dts(s, 0) / 1000000. , get_dts(s, ffm->file_size - 2 * FFM_PACKET_SIZE) / 1000000. );
 
  end:
-    url_fseek(pb, ptr, SEEK_SET);
+    avio_seek(pb, ptr, SEEK_SET);
 }
 
 
diff --git a/libavformat/filmstripdec.c b/libavformat/filmstripdec.c
index 87219c83ff..8a0770e688 100644
--- a/libavformat/filmstripdec.c
+++ b/libavformat/filmstripdec.c
@@ -43,7 +43,7 @@ static int read_header(AVFormatContext *s,
     if (url_is_streamed(s->pb))
         return AVERROR(EIO);
 
-    url_fseek(pb, url_fsize(pb) - 36, SEEK_SET);
+    avio_seek(pb, url_fsize(pb) - 36, SEEK_SET);
     if (avio_rb32(pb) != RAND_TAG) {
         av_log(s, AV_LOG_ERROR, "magic number not found");
         return AVERROR_INVALIDDATA;
@@ -69,7 +69,7 @@ static int read_header(AVFormatContext *s,
     film->leading         = avio_rb16(pb);
     av_set_pts_info(st, 64, 1, avio_rb16(pb));
 
-    url_fseek(pb, 0, SEEK_SET);
+    avio_seek(pb, 0, SEEK_SET);
 
     return 0;
 }
@@ -94,7 +94,7 @@ static int read_packet(AVFormatContext *s,
 static int read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
 {
     AVStream *st = s->streams[stream_index];
-    url_fseek(s->pb, FFMAX(timestamp, 0) * st->codec->width * st->codec->height * 4, SEEK_SET);
+    avio_seek(s->pb, FFMAX(timestamp, 0) * st->codec->width * st->codec->height * 4, SEEK_SET);
     return 0;
 }
 
diff --git a/libavformat/flacdec.c b/libavformat/flacdec.c
index bed9863f9a..73eeacb422 100644
--- a/libavformat/flacdec.c
+++ b/libavformat/flacdec.c
@@ -41,7 +41,7 @@ static int flac_read_header(AVFormatContext *s,
 
     /* if fLaC marker is not found, assume there is no header */
     if (avio_rl32(s->pb) != MKTAG('f','L','a','C')) {
-        url_fseek(s->pb, -4, SEEK_CUR);
+        avio_seek(s->pb, -4, SEEK_CUR);
         return 0;
     }
 
@@ -65,7 +65,7 @@ static int flac_read_header(AVFormatContext *s,
             break;
         /* skip metadata block for unsupported types */
         default:
-            ret = url_fseek(s->pb, metadata_size, SEEK_CUR);
+            ret = avio_seek(s->pb, metadata_size, SEEK_CUR);
             if (ret < 0)
                 return ret;
         }
diff --git a/libavformat/flacenc.c b/libavformat/flacenc.c
index d11d75d27d..cfd9e09499 100644
--- a/libavformat/flacenc.c
+++ b/libavformat/flacenc.c
@@ -101,9 +101,9 @@ static int flac_write_trailer(struct AVFormatContext *s)
     if (!url_is_streamed(pb)) {
         /* rewrite the STREAMINFO header block data */
         file_size = url_ftell(pb);
-        url_fseek(pb, 8, SEEK_SET);
+        avio_seek(pb, 8, SEEK_SET);
         avio_write(pb, streaminfo, FLAC_STREAMINFO_SIZE);
-        url_fseek(pb, file_size, SEEK_SET);
+        avio_seek(pb, file_size, SEEK_SET);
         put_flush_packet(pb);
     } else {
         av_log(s, AV_LOG_WARNING, "unable to rewrite FLAC header.\n");
diff --git a/libavformat/flic.c b/libavformat/flic.c
index 2f6e218357..cdbd9c80eb 100644
--- a/libavformat/flic.c
+++ b/libavformat/flic.c
@@ -135,7 +135,7 @@ static int flic_read_header(AVFormatContext *s,
         return AVERROR(EIO);
     }
 
-    url_fseek(pb, -FLIC_PREAMBLE_SIZE, SEEK_CUR);
+    avio_seek(pb, -FLIC_PREAMBLE_SIZE, SEEK_CUR);
 
     /* Time to figure out the framerate:
      * If the first preamble's magic number is 0xAAAA then this file is from
@@ -173,7 +173,7 @@ static int flic_read_header(AVFormatContext *s,
         av_set_pts_info(st, 64, FLIC_MC_SPEED, 70);
 
         /* rewind the stream since the first chunk is at offset 12 */
-        url_fseek(pb, 12, SEEK_SET);
+        avio_seek(pb, 12, SEEK_SET);
 
         /* send over abbreviated FLIC header chunk */
         av_free(st->codec->extradata);
@@ -239,7 +239,7 @@ static int flic_read_packet(AVFormatContext *s,
             }
 
             /* skip useless 10B sub-header (yes, it's not accounted for in the chunk header) */
-            url_fseek(pb, 10, SEEK_CUR);
+            avio_seek(pb, 10, SEEK_CUR);
 
             pkt->stream_index = flic->audio_stream_index;
             pkt->pos = url_ftell(pb);
@@ -253,7 +253,7 @@ static int flic_read_packet(AVFormatContext *s,
             packet_read = 1;
         } else {
             /* not interested in this chunk */
-            url_fseek(pb, size - 6, SEEK_CUR);
+            avio_seek(pb, size - 6, SEEK_CUR);
         }
     }
 
diff --git a/libavformat/flvdec.c b/libavformat/flvdec.c
index e42598d98e..05f1ab558a 100644
--- a/libavformat/flvdec.c
+++ b/libavformat/flvdec.c
@@ -277,7 +277,7 @@ static int flv_read_header(AVFormatContext *s,
     }
 
     offset = avio_rb32(s->pb);
-    url_fseek(s->pb, offset, SEEK_SET);
+    avio_seek(s->pb, offset, SEEK_SET);
     url_fskip(s->pb, 4);
 
     s->start_time = 0;
@@ -337,7 +337,7 @@ static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
         else /* skip packet */
             av_log(s, AV_LOG_DEBUG, "skipping flv packet: type %d, size %d, flags %d\n", type, size, flags);
     skip:
-        url_fseek(s->pb, next, SEEK_SET);
+        avio_seek(s->pb, next, SEEK_SET);
         continue;
     }
 
@@ -361,7 +361,7 @@ static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
        ||(st->discard >= AVDISCARD_BIDIR  &&  ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_DISP_INTER && !is_audio))
        || st->discard >= AVDISCARD_ALL
        ){
-        url_fseek(s->pb, next, SEEK_SET);
+        avio_seek(s->pb, next, SEEK_SET);
         continue;
     }
     if ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY)
@@ -374,15 +374,15 @@ static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
         int size;
         const int64_t pos= url_ftell(s->pb);
         const int64_t fsize= url_fsize(s->pb);
-        url_fseek(s->pb, fsize-4, SEEK_SET);
+        avio_seek(s->pb, fsize-4, SEEK_SET);
         size= avio_rb32(s->pb);
-        url_fseek(s->pb, fsize-3-size, SEEK_SET);
+        avio_seek(s->pb, fsize-3-size, SEEK_SET);
         if(size == avio_rb24(s->pb) + 11){
             uint32_t ts = avio_rb24(s->pb);
             ts |= avio_r8(s->pb) << 24;
             s->duration = ts * (int64_t)AV_TIME_BASE / 1000;
         }
-        url_fseek(s->pb, pos, SEEK_SET);
+        avio_seek(s->pb, pos, SEEK_SET);
     }
 
     if(is_audio){
diff --git a/libavformat/flvenc.c b/libavformat/flvenc.c
index 4d49a966e9..7dd47da8a4 100644
--- a/libavformat/flvenc.c
+++ b/libavformat/flvenc.c
@@ -289,9 +289,9 @@ static int flv_write_header(AVFormatContext *s)
 
     /* write total size of tag */
     data_size= url_ftell(pb) - metadata_size_pos - 10;
-    url_fseek(pb, metadata_size_pos, SEEK_SET);
+    avio_seek(pb, metadata_size_pos, SEEK_SET);
     avio_wb24(pb, data_size);
-    url_fseek(pb, data_size + 10 - 3, SEEK_CUR);
+    avio_seek(pb, data_size + 10 - 3, SEEK_CUR);
     avio_wb32(pb, data_size + 11);
 
     for (i = 0; i < s->nb_streams; i++) {
@@ -316,9 +316,9 @@ static int flv_write_header(AVFormatContext *s)
                 ff_isom_write_avcc(pb, enc->extradata, enc->extradata_size);
             }
             data_size = url_ftell(pb) - pos;
-            url_fseek(pb, -data_size - 10, SEEK_CUR);
+            avio_seek(pb, -data_size - 10, SEEK_CUR);
             avio_wb24(pb, data_size);
-            url_fseek(pb, data_size + 10 - 3, SEEK_CUR);
+            avio_seek(pb, data_size + 10 - 3, SEEK_CUR);
             avio_wb32(pb, data_size + 11); // previous tag size
         }
     }
@@ -346,12 +346,12 @@ static int flv_write_trailer(AVFormatContext *s)
     file_size = url_ftell(pb);
 
     /* update informations */
-    url_fseek(pb, flv->duration_offset, SEEK_SET);
+    avio_seek(pb, flv->duration_offset, SEEK_SET);
     put_amf_double(pb, flv->duration / (double)1000);
-    url_fseek(pb, flv->filesize_offset, SEEK_SET);
+    avio_seek(pb, flv->filesize_offset, SEEK_SET);
     put_amf_double(pb, file_size);
 
-    url_fseek(pb, file_size, SEEK_SET);
+    avio_seek(pb, file_size, SEEK_SET);
     return 0;
 }
 
diff --git a/libavformat/gxf.c b/libavformat/gxf.c
index 5b8b33c5f2..b290035c90 100644
--- a/libavformat/gxf.c
+++ b/libavformat/gxf.c
@@ -397,10 +397,10 @@ start:
     if (tmp != 1)
         goto start;
     last_pos = url_ftell(pb);
-    if (url_fseek(pb, -5, SEEK_CUR) < 0)
+    if (avio_seek(pb, -5, SEEK_CUR) < 0)
         goto out;
     if (!parse_packet_header(pb, &type, &len) || type != PKT_MEDIA) {
-        if (url_fseek(pb, last_pos, SEEK_SET) < 0)
+        if (avio_seek(pb, last_pos, SEEK_SET) < 0)
             goto out;
         goto start;
     }
@@ -409,12 +409,12 @@ start:
     cur_timestamp = avio_rb32(pb);
     last_found_pos = url_ftell(pb) - 16 - 6;
     if ((track >= 0 && track != cur_track) || (timestamp >= 0 && timestamp > cur_timestamp)) {
-        if (url_fseek(pb, last_pos, SEEK_SET) >= 0)
+        if (avio_seek(pb, last_pos, SEEK_SET) >= 0)
             goto start;
     }
 out:
     if (last_found_pos)
-        url_fseek(pb, last_found_pos, SEEK_SET);
+        avio_seek(pb, last_found_pos, SEEK_SET);
     return cur_timestamp;
 }
 
@@ -495,7 +495,7 @@ static int gxf_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int
     if (idx < st->nb_index_entries - 2)
         maxlen = st->index_entries[idx + 2].pos - pos;
     maxlen = FFMAX(maxlen, 200 * 1024);
-    res = url_fseek(s->pb, pos, SEEK_SET);
+    res = avio_seek(s->pb, pos, SEEK_SET);
     if (res < 0)
         return res;
     found = gxf_resync_media(s, maxlen, -1, timestamp);
@@ -508,7 +508,7 @@ static int64_t gxf_read_timestamp(AVFormatContext *s, int stream_index,
                                   int64_t *pos, int64_t pos_limit) {
     AVIOContext *pb = s->pb;
     int64_t res;
-    if (url_fseek(pb, *pos, SEEK_SET) < 0)
+    if (avio_seek(pb, *pos, SEEK_SET) < 0)
         return AV_NOPTS_VALUE;
     res = gxf_resync_media(s, pos_limit - *pos, -1, -1);
     *pos = url_ftell(pb);
diff --git a/libavformat/gxfenc.c b/libavformat/gxfenc.c
index 1b12f41e22..66accb3e08 100644
--- a/libavformat/gxfenc.c
+++ b/libavformat/gxfenc.c
@@ -131,9 +131,9 @@ static int64_t updatePacketSize(AVIOContext *pb, int64_t pos)
         size = url_ftell(pb) - pos;
     }
     curpos = url_ftell(pb);
-    url_fseek(pb, pos + 6, SEEK_SET);
+    avio_seek(pb, pos + 6, SEEK_SET);
     avio_wb32(pb, size);
-    url_fseek(pb, curpos, SEEK_SET);
+    avio_seek(pb, curpos, SEEK_SET);
     return curpos - pos;
 }
 
@@ -142,9 +142,9 @@ static int64_t updateSize(AVIOContext *pb, int64_t pos)
     int64_t curpos;
 
     curpos = url_ftell(pb);
-    url_fseek(pb, pos, SEEK_SET);
+    avio_seek(pb, pos, SEEK_SET);
     avio_wb16(pb, curpos - pos - 2);
-    url_fseek(pb, curpos, SEEK_SET);
+    avio_seek(pb, curpos, SEEK_SET);
     return curpos - pos;
 }
 
@@ -581,9 +581,9 @@ static int gxf_write_umf_media_description(AVFormatContext *s)
         }
 
         curpos = url_ftell(pb);
-        url_fseek(pb, startpos, SEEK_SET);
+        avio_seek(pb, startpos, SEEK_SET);
         avio_wl16(pb, curpos - startpos);
-        url_fseek(pb, curpos, SEEK_SET);
+        avio_seek(pb, curpos, SEEK_SET);
     }
     return url_ftell(pb) - pos;
 }
@@ -776,7 +776,7 @@ static int gxf_write_trailer(AVFormatContext *s)
 
     gxf_write_eos_packet(pb);
     end = url_ftell(pb);
-    url_fseek(pb, 0, SEEK_SET);
+    avio_seek(pb, 0, SEEK_SET);
     /* overwrite map, flt and umf packets with new values */
     gxf_write_map_packet(s, 1);
     gxf_write_flt_packet(s);
@@ -784,12 +784,12 @@ static int gxf_write_trailer(AVFormatContext *s)
     put_flush_packet(pb);
     /* update duration in all map packets */
     for (i = 1; i < gxf->map_offsets_nb; i++) {
-        url_fseek(pb, gxf->map_offsets[i], SEEK_SET);
+        avio_seek(pb, gxf->map_offsets[i], SEEK_SET);
         gxf_write_map_packet(s, 1);
         put_flush_packet(pb);
     }
 
-    url_fseek(pb, end, SEEK_SET);
+    avio_seek(pb, end, SEEK_SET);
 
     av_freep(&gxf->flt_entries);
     av_freep(&gxf->map_offsets);
diff --git a/libavformat/id3v1.c b/libavformat/id3v1.c
index 35199d89f8..e17e785ad5 100644
--- a/libavformat/id3v1.c
+++ b/libavformat/id3v1.c
@@ -232,12 +232,12 @@ void ff_id3v1_read(AVFormatContext *s)
         /* XXX: change that */
         filesize = url_fsize(s->pb);
         if (filesize > 128) {
-            url_fseek(s->pb, filesize - 128, SEEK_SET);
+            avio_seek(s->pb, filesize - 128, SEEK_SET);
             ret = avio_read(s->pb, buf, ID3v1_TAG_SIZE);
             if (ret == ID3v1_TAG_SIZE) {
                 parse_tag(s, buf);
             }
-            url_fseek(s->pb, 0, SEEK_SET);
+            avio_seek(s->pb, 0, SEEK_SET);
         }
     }
 }
diff --git a/libavformat/id3v2.c b/libavformat/id3v2.c
index a3e51407e9..43a41c2d55 100644
--- a/libavformat/id3v2.c
+++ b/libavformat/id3v2.c
@@ -230,7 +230,7 @@ static void ff_id3v2_parse(AVFormatContext *s, int len, uint8_t version, uint8_t
             break;
         }
         /* Skip to end of tag */
-        url_fseek(s->pb, next, SEEK_SET);
+        avio_seek(s->pb, next, SEEK_SET);
     }
 
     if (len > 0) {
@@ -271,7 +271,7 @@ void ff_id3v2_read(AVFormatContext *s, const char *magic)
                    (buf[9] & 0x7f);
             ff_id3v2_parse(s, len, buf[3], buf[5]);
         } else {
-            url_fseek(s->pb, off, SEEK_SET);
+            avio_seek(s->pb, off, SEEK_SET);
         }
     } while (found_header);
     ff_metadata_conv(&s->metadata, NULL, ff_id3v2_34_metadata_conv);
diff --git a/libavformat/idcin.c b/libavformat/idcin.c
index 7421901a9b..1aecf86669 100644
--- a/libavformat/idcin.c
+++ b/libavformat/idcin.c
@@ -257,7 +257,7 @@ static int idcin_read_packet(AVFormatContext *s,
 
         chunk_size = avio_rl32(pb);
         /* skip the number of decoded bytes (always equal to width * height) */
-        url_fseek(pb, 4, SEEK_CUR);
+        avio_seek(pb, 4, SEEK_CUR);
         chunk_size -= 4;
         ret= av_get_packet(pb, pkt, chunk_size);
         if (ret < 0)
diff --git a/libavformat/idroqdec.c b/libavformat/idroqdec.c
index 5b18397532..71324d8803 100644
--- a/libavformat/idroqdec.c
+++ b/libavformat/idroqdec.c
@@ -136,14 +136,14 @@ static int roq_read_packet(AVFormatContext *s,
                 break;
             }
             /* don't care about this chunk anymore */
-            url_fseek(pb, RoQ_CHUNK_PREAMBLE_SIZE, SEEK_CUR);
+            avio_seek(pb, RoQ_CHUNK_PREAMBLE_SIZE, SEEK_CUR);
             break;
 
         case RoQ_QUAD_CODEBOOK:
             /* packet needs to contain both this codebook and next VQ chunk */
             codebook_offset = url_ftell(pb) - RoQ_CHUNK_PREAMBLE_SIZE;
             codebook_size = chunk_size;
-            url_fseek(pb, codebook_size, SEEK_CUR);
+            avio_seek(pb, codebook_size, SEEK_CUR);
             if (avio_read(pb, preamble, RoQ_CHUNK_PREAMBLE_SIZE) !=
                 RoQ_CHUNK_PREAMBLE_SIZE)
                 return AVERROR(EIO);
@@ -151,7 +151,7 @@ static int roq_read_packet(AVFormatContext *s,
                 codebook_size;
 
             /* rewind */
-            url_fseek(pb, codebook_offset, SEEK_SET);
+            avio_seek(pb, codebook_offset, SEEK_SET);
 
             /* load up the packet */
             ret= av_get_packet(pb, pkt, chunk_size);
diff --git a/libavformat/iff.c b/libavformat/iff.c
index 15327c2421..a5332ab945 100644
--- a/libavformat/iff.c
+++ b/libavformat/iff.c
@@ -226,7 +226,7 @@ static int iff_read_header(AVFormatContext *s,
         url_fskip(pb, data_size - (url_ftell(pb) - orig_pos) + (data_size & 1));
     }
 
-    url_fseek(pb, iff->body_pos, SEEK_SET);
+    avio_seek(pb, iff->body_pos, SEEK_SET);
 
     switch(st->codec->codec_type) {
     case AVMEDIA_TYPE_AUDIO:
diff --git a/libavformat/ipmovie.c b/libavformat/ipmovie.c
index 6514397a1e..e02e00b15a 100644
--- a/libavformat/ipmovie.c
+++ b/libavformat/ipmovie.c
@@ -133,7 +133,7 @@ static int load_ipmovie_packet(IPMVEContext *s, AVIOContext *pb,
             s->audio_chunk_size -= 6;
         }
 
-        url_fseek(pb, s->audio_chunk_offset, SEEK_SET);
+        avio_seek(pb, s->audio_chunk_offset, SEEK_SET);
         s->audio_chunk_offset = 0;
 
         if (s->audio_chunk_size != av_get_packet(pb, pkt, s->audio_chunk_size))
@@ -163,7 +163,7 @@ static int load_ipmovie_packet(IPMVEContext *s, AVIOContext *pb,
             return CHUNK_NOMEM;
 
         pkt->pos= s->decode_map_chunk_offset;
-        url_fseek(pb, s->decode_map_chunk_offset, SEEK_SET);
+        avio_seek(pb, s->decode_map_chunk_offset, SEEK_SET);
         s->decode_map_chunk_offset = 0;
 
         if (avio_read(pb, pkt->data, s->decode_map_chunk_size) !=
@@ -172,7 +172,7 @@ static int load_ipmovie_packet(IPMVEContext *s, AVIOContext *pb,
             return CHUNK_EOF;
         }
 
-        url_fseek(pb, s->video_chunk_offset, SEEK_SET);
+        avio_seek(pb, s->video_chunk_offset, SEEK_SET);
         s->video_chunk_offset = 0;
 
         if (avio_read(pb, pkt->data + s->decode_map_chunk_size,
@@ -193,7 +193,7 @@ static int load_ipmovie_packet(IPMVEContext *s, AVIOContext *pb,
 
     } else {
 
-        url_fseek(pb, s->next_chunk_offset, SEEK_SET);
+        avio_seek(pb, s->next_chunk_offset, SEEK_SET);
         chunk_type = CHUNK_DONE;
 
     }
@@ -299,12 +299,12 @@ static int process_ipmovie_chunk(IPMVEContext *s, AVIOContext *pb,
 
         case OPCODE_END_OF_STREAM:
             debug_ipmovie("end of stream\n");
-            url_fseek(pb, opcode_size, SEEK_CUR);
+            avio_seek(pb, opcode_size, SEEK_CUR);
             break;
 
         case OPCODE_END_OF_CHUNK:
             debug_ipmovie("end of chunk\n");
-            url_fseek(pb, opcode_size, SEEK_CUR);
+            avio_seek(pb, opcode_size, SEEK_CUR);
             break;
 
         case OPCODE_CREATE_TIMER:
@@ -359,7 +359,7 @@ static int process_ipmovie_chunk(IPMVEContext *s, AVIOContext *pb,
 
         case OPCODE_START_STOP_AUDIO:
             debug_ipmovie("start/stop audio\n");
-            url_fseek(pb, opcode_size, SEEK_CUR);
+            avio_seek(pb, opcode_size, SEEK_CUR);
             break;
 
         case OPCODE_INIT_VIDEO_BUFFERS:
@@ -393,12 +393,12 @@ static int process_ipmovie_chunk(IPMVEContext *s, AVIOContext *pb,
         case OPCODE_UNKNOWN_14:
         case OPCODE_UNKNOWN_15:
             debug_ipmovie("unknown (but documented) opcode %02X\n", opcode_type);
-            url_fseek(pb, opcode_size, SEEK_CUR);
+            avio_seek(pb, opcode_size, SEEK_CUR);
             break;
 
         case OPCODE_SEND_BUFFER:
             debug_ipmovie("send buffer\n");
-            url_fseek(pb, opcode_size, SEEK_CUR);
+            avio_seek(pb, opcode_size, SEEK_CUR);
             break;
 
         case OPCODE_AUDIO_FRAME:
@@ -407,22 +407,22 @@ static int process_ipmovie_chunk(IPMVEContext *s, AVIOContext *pb,
             /* log position and move on for now */
             s->audio_chunk_offset = url_ftell(pb);
             s->audio_chunk_size = opcode_size;
-            url_fseek(pb, opcode_size, SEEK_CUR);
+            avio_seek(pb, opcode_size, SEEK_CUR);
             break;
 
         case OPCODE_SILENCE_FRAME:
             debug_ipmovie("silence frame\n");
-            url_fseek(pb, opcode_size, SEEK_CUR);
+            avio_seek(pb, opcode_size, SEEK_CUR);
             break;
 
         case OPCODE_INIT_VIDEO_MODE:
             debug_ipmovie("initialize video mode\n");
-            url_fseek(pb, opcode_size, SEEK_CUR);
+            avio_seek(pb, opcode_size, SEEK_CUR);
             break;
 
         case OPCODE_CREATE_GRADIENT:
             debug_ipmovie("create gradient\n");
-            url_fseek(pb, opcode_size, SEEK_CUR);
+            avio_seek(pb, opcode_size, SEEK_CUR);
             break;
 
         case OPCODE_SET_PALETTE:
@@ -464,7 +464,7 @@ static int process_ipmovie_chunk(IPMVEContext *s, AVIOContext *pb,
 
         case OPCODE_SET_PALETTE_COMPRESSED:
             debug_ipmovie("set palette compressed\n");
-            url_fseek(pb, opcode_size, SEEK_CUR);
+            avio_seek(pb, opcode_size, SEEK_CUR);
             break;
 
         case OPCODE_SET_DECODING_MAP:
@@ -473,7 +473,7 @@ static int process_ipmovie_chunk(IPMVEContext *s, AVIOContext *pb,
             /* log position and move on for now */
             s->decode_map_chunk_offset = url_ftell(pb);
             s->decode_map_chunk_size = opcode_size;
-            url_fseek(pb, opcode_size, SEEK_CUR);
+            avio_seek(pb, opcode_size, SEEK_CUR);
             break;
 
         case OPCODE_VIDEO_DATA:
@@ -482,7 +482,7 @@ static int process_ipmovie_chunk(IPMVEContext *s, AVIOContext *pb,
             /* log position and move on for now */
             s->video_chunk_offset = url_ftell(pb);
             s->video_chunk_size = opcode_size;
-            url_fseek(pb, opcode_size, SEEK_CUR);
+            avio_seek(pb, opcode_size, SEEK_CUR);
             break;
 
         default:
@@ -553,7 +553,7 @@ static int ipmovie_read_header(AVFormatContext *s,
         CHUNK_PREAMBLE_SIZE)
         return AVERROR(EIO);
     chunk_type = AV_RL16(&chunk_preamble[2]);
-    url_fseek(pb, -CHUNK_PREAMBLE_SIZE, SEEK_CUR);
+    avio_seek(pb, -CHUNK_PREAMBLE_SIZE, SEEK_CUR);
 
     if (chunk_type == CHUNK_VIDEO)
         ipmovie->audio_type = CODEC_ID_NONE;  /* no audio */
diff --git a/libavformat/libnut.c b/libavformat/libnut.c
index af94d8c30e..467ca9c4a5 100644
--- a/libavformat/libnut.c
+++ b/libavformat/libnut.c
@@ -182,7 +182,7 @@ static off_t av_seek(void * h, long long pos, int whence) {
         pos = url_fsize(bc) + pos;
         whence = SEEK_SET;
     }
-    return url_fseek(bc, pos, whence);
+    return avio_seek(bc, pos, whence);
 }
 
 static int nut_read_header(AVFormatContext * avf, AVFormatParameters * ap) {
diff --git a/libavformat/matroskadec.c b/libavformat/matroskadec.c
index 4488dd6c50..72abfc1d56 100644
--- a/libavformat/matroskadec.c
+++ b/libavformat/matroskadec.c
@@ -831,7 +831,7 @@ static int ebml_parse_elem(MatroskaDemuxContext *matroska,
                      return ebml_parse_nest(matroska, syntax->def.n, data);
     case EBML_PASS:  return ebml_parse_id(matroska, syntax->def.n, id, data);
     case EBML_STOP:  return 1;
-    default:         return url_fseek(pb,length,SEEK_CUR)<0 ? AVERROR(EIO) : 0;
+    default:         return avio_seek(pb,length,SEEK_CUR)<0 ? AVERROR(EIO) : 0;
     }
     if (res == AVERROR_INVALIDDATA)
         av_log(matroska->ctx, AV_LOG_ERROR, "Invalid element\n");
@@ -1130,7 +1130,7 @@ static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
             continue;
 
         /* seek */
-        if (url_fseek(matroska->ctx->pb, offset, SEEK_SET) != offset)
+        if (avio_seek(matroska->ctx->pb, offset, SEEK_SET) != offset)
             continue;
 
         /* We don't want to lose our seekhead level, so we add
@@ -1159,7 +1159,7 @@ static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
     }
 
     /* seek back */
-    url_fseek(matroska->ctx->pb, before_pos, SEEK_SET);
+    avio_seek(matroska->ctx->pb, before_pos, SEEK_SET);
     matroska->level_up = level_up;
     matroska->current_id = saved_id;
 }
@@ -1889,7 +1889,7 @@ static int matroska_read_seek(AVFormatContext *s, int stream_index,
     timestamp = FFMAX(timestamp, st->index_entries[0].timestamp);
 
     if ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
-        url_fseek(s->pb, st->index_entries[st->nb_index_entries-1].pos, SEEK_SET);
+        avio_seek(s->pb, st->index_entries[st->nb_index_entries-1].pos, SEEK_SET);
         while ((index = av_index_search_timestamp(st, timestamp, flags)) < 0) {
             matroska_clear_queue(matroska);
             if (matroska_parse_cluster(matroska) < 0)
@@ -1914,7 +1914,7 @@ static int matroska_read_seek(AVFormatContext *s, int stream_index,
         }
     }
 
-    url_fseek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
+    avio_seek(s->pb, st->index_entries[index_min].pos, SEEK_SET);
     matroska->skip_to_keyframe = !(flags & AVSEEK_FLAG_ANY);
     matroska->skip_to_timecode = st->index_entries[index].timestamp;
     matroska->done = 0;
diff --git a/libavformat/matroskaenc.c b/libavformat/matroskaenc.c
index 2f075942ec..6f752204cc 100644
--- a/libavformat/matroskaenc.c
+++ b/libavformat/matroskaenc.c
@@ -231,10 +231,10 @@ static void end_ebml_master(AVIOContext *pb, ebml_master master)
 {
     int64_t pos = url_ftell(pb);
 
-    if (url_fseek(pb, master.pos - master.sizebytes, SEEK_SET) < 0)
+    if (avio_seek(pb, master.pos - master.sizebytes, SEEK_SET) < 0)
         return;
     put_ebml_num(pb, pos - master.pos, master.sizebytes);
-    url_fseek(pb, pos, SEEK_SET);
+    avio_seek(pb, pos, SEEK_SET);
 }
 
 static void put_xiph_size(AVIOContext *pb, int size)
@@ -313,7 +313,7 @@ static int64_t mkv_write_seekhead(AVIOContext *pb, mkv_seekhead *seekhead)
     currentpos = url_ftell(pb);
 
     if (seekhead->reserved_size > 0)
-        if (url_fseek(pb, seekhead->filepos, SEEK_SET) < 0)
+        if (avio_seek(pb, seekhead->filepos, SEEK_SET) < 0)
             return -1;
 
     metaseek = start_ebml_master(pb, MATROSKA_ID_SEEKHEAD, seekhead->reserved_size);
@@ -334,7 +334,7 @@ static int64_t mkv_write_seekhead(AVIOContext *pb, mkv_seekhead *seekhead)
     if (seekhead->reserved_size > 0) {
         uint64_t remaining = seekhead->filepos + seekhead->reserved_size - url_ftell(pb);
         put_ebml_void(pb, remaining);
-        url_fseek(pb, currentpos, SEEK_SET);
+        avio_seek(pb, currentpos, SEEK_SET);
 
         currentpos = seekhead->filepos;
     }
@@ -1163,10 +1163,10 @@ static int mkv_write_trailer(AVFormatContext *s)
         // update the duration
         av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
         currentpos = url_ftell(pb);
-        url_fseek(pb, mkv->duration_offset, SEEK_SET);
+        avio_seek(pb, mkv->duration_offset, SEEK_SET);
         put_ebml_float(pb, MATROSKA_ID_DURATION, mkv->duration);
 
-        url_fseek(pb, currentpos, SEEK_SET);
+        avio_seek(pb, currentpos, SEEK_SET);
     }
 
     end_ebml_master(pb, mkv->segment);
diff --git a/libavformat/mm.c b/libavformat/mm.c
index 2c0d215abf..699daac5e9 100644
--- a/libavformat/mm.c
+++ b/libavformat/mm.c
@@ -102,7 +102,7 @@ static int read_header(AVFormatContext *s,
     avio_rl16(pb);   /* ibm-pc video bios mode */
     width = avio_rl16(pb);
     height = avio_rl16(pb);
-    url_fseek(pb, length - 10, SEEK_CUR);  /* unknown data */
+    avio_seek(pb, length - 10, SEEK_CUR);  /* unknown data */
 
     /* video stream */
     st = av_new_stream(s, 0);
@@ -181,7 +181,7 @@ static int read_packet(AVFormatContext *s,
 
         default :
             av_log(s, AV_LOG_INFO, "unknown chunk type 0x%x\n", type);
-            url_fseek(pb, length, SEEK_CUR);
+            avio_seek(pb, length, SEEK_CUR);
         }
     }
 
diff --git a/libavformat/mmf.c b/libavformat/mmf.c
index bcb862c4b5..a68870c1c2 100644
--- a/libavformat/mmf.c
+++ b/libavformat/mmf.c
@@ -53,9 +53,9 @@ static void end_tag_be(AVIOContext *pb, int64_t start)
     int64_t pos;
 
     pos = url_ftell(pb);
-    url_fseek(pb, start - 4, SEEK_SET);
+    avio_seek(pb, start - 4, SEEK_SET);
     avio_wb32(pb, (uint32_t)(pos - start));
-    url_fseek(pb, pos, SEEK_SET);
+    avio_seek(pb, pos, SEEK_SET);
 }
 
 static int mmf_write_header(AVFormatContext *s)
@@ -143,7 +143,7 @@ static int mmf_write_trailer(AVFormatContext *s)
         size = pos - mmf->awapos;
 
         /* Fill Atsq chunk */
-        url_fseek(pb, mmf->atsqpos, SEEK_SET);
+        avio_seek(pb, mmf->atsqpos, SEEK_SET);
 
         /* "play wav" */
         avio_w8(pb, 0); /* start time */
@@ -158,7 +158,7 @@ static int mmf_write_trailer(AVFormatContext *s)
         /* "end of sequence" */
         avio_write(pb, "\x00\x00\x00\x00", 4);
 
-        url_fseek(pb, pos, SEEK_SET);
+        avio_seek(pb, pos, SEEK_SET);
 
         put_flush_packet(pb);
     }
@@ -195,7 +195,7 @@ static int mmf_read_header(AVFormatContext *s,
     file_size = avio_rb32(pb);
 
     /* Skip some unused chunks that may or may not be present */
-    for(;; url_fseek(pb, size, SEEK_CUR)) {
+    for(;; avio_seek(pb, size, SEEK_CUR)) {
         tag = avio_rl32(pb);
         size = avio_rb32(pb);
         if(tag == MKTAG('C','N','T','I')) continue;
@@ -226,7 +226,7 @@ static int mmf_read_header(AVFormatContext *s,
     avio_r8(pb); /* time base g */
 
     /* Skip some unused chunks that may or may not be present */
-    for(;; url_fseek(pb, size, SEEK_CUR)) {
+    for(;; avio_seek(pb, size, SEEK_CUR)) {
         tag = avio_rl32(pb);
         size = avio_rb32(pb);
         if(tag == MKTAG('A','t','s','q')) continue;
diff --git a/libavformat/mov.c b/libavformat/mov.c
index 6becc77c0c..f8360c6e61 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -419,7 +419,7 @@ static int mov_read_dref(MOVContext *c, AVIOContext *pb, MOVAtom atom)
                     url_fskip(pb, len);
             }
         }
-        url_fseek(pb, next, SEEK_SET);
+        avio_seek(pb, next, SEEK_SET);
     }
     return 0;
 }
@@ -1840,7 +1840,7 @@ static int mov_read_meta(MOVContext *c, AVIOContext *pb, MOVAtom atom)
         uint32_t tag = avio_rl32(pb);
         atom.size -= 4;
         if (tag == MKTAG('h','d','l','r')) {
-            url_fseek(pb, -8, SEEK_CUR);
+            avio_seek(pb, -8, SEEK_CUR);
             atom.size += 8;
             return mov_read_default(c, pb, atom);
         }
@@ -2308,7 +2308,7 @@ static void mov_read_chapters(AVFormatContext *s)
         uint16_t ch;
         int len, title_len;
 
-        if (url_fseek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
+        if (avio_seek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
             av_log(s, AV_LOG_ERROR, "Chapter %d not found in file\n", i);
             goto finish;
         }
@@ -2338,7 +2338,7 @@ static void mov_read_chapters(AVFormatContext *s)
         av_freep(&title);
     }
 finish:
-    url_fseek(sc->pb, cur_pos, SEEK_SET);
+    avio_seek(sc->pb, cur_pos, SEEK_SET);
 }
 
 static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)
@@ -2421,7 +2421,7 @@ static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)
     sc->current_sample++;
 
     if (st->discard != AVDISCARD_ALL) {
-        if (url_fseek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
+        if (avio_seek(sc->pb, sample->pos, SEEK_SET) != sample->pos) {
             av_log(mov->fc, AV_LOG_ERROR, "stream %d, offset 0x%"PRIx64": partial file\n",
                    sc->ffindex, sample->pos);
             return -1;
diff --git a/libavformat/movenc.c b/libavformat/movenc.c
index de16b5b190..030cbda467 100644
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@@ -40,9 +40,9 @@
 static int64_t updateSize(AVIOContext *pb, int64_t pos)
 {
     int64_t curpos = url_ftell(pb);
-    url_fseek(pb, pos, SEEK_SET);
+    avio_seek(pb, pos, SEEK_SET);
     avio_wb32(pb, curpos - pos); /* rewrite size */
-    url_fseek(pb, curpos, SEEK_SET);
+    avio_seek(pb, curpos, SEEK_SET);
 
     return curpos - pos;
 }
@@ -130,9 +130,9 @@ static int mov_write_stsc_tag(AVIOContext *pb, MOVTrack *track)
         }
     }
     curpos = url_ftell(pb);
-    url_fseek(pb, entryPos, SEEK_SET);
+    avio_seek(pb, entryPos, SEEK_SET);
     avio_wb32(pb, index); // rewrite size
-    url_fseek(pb, curpos, SEEK_SET);
+    avio_seek(pb, curpos, SEEK_SET);
 
     return updateSize(pb, pos);
 }
@@ -155,9 +155,9 @@ static int mov_write_stss_tag(AVIOContext *pb, MOVTrack *track, uint32_t flag)
         }
     }
     curpos = url_ftell(pb);
-    url_fseek(pb, entryPos, SEEK_SET);
+    avio_seek(pb, entryPos, SEEK_SET);
     avio_wb32(pb, index); // rewrite size
-    url_fseek(pb, curpos, SEEK_SET);
+    avio_seek(pb, curpos, SEEK_SET);
     return updateSize(pb, pos);
 }
 
@@ -2235,16 +2235,16 @@ static int mov_write_trailer(AVFormatContext *s)
 
     /* Write size of mdat tag */
     if (mov->mdat_size+8 <= UINT32_MAX) {
-        url_fseek(pb, mov->mdat_pos, SEEK_SET);
+        avio_seek(pb, mov->mdat_pos, SEEK_SET);
         avio_wb32(pb, mov->mdat_size+8);
     } else {
         /* overwrite 'wide' placeholder atom */
-        url_fseek(pb, mov->mdat_pos - 8, SEEK_SET);
+        avio_seek(pb, mov->mdat_pos - 8, SEEK_SET);
         avio_wb32(pb, 1); /* special value: real atom size will be 64 bit value after tag field */
         ffio_wfourcc(pb, "mdat");
         avio_wb64(pb, mov->mdat_size+16);
     }
-    url_fseek(pb, moov_pos, SEEK_SET);
+    avio_seek(pb, moov_pos, SEEK_SET);
 
     mov_write_moov_tag(pb, mov, s);
 
diff --git a/libavformat/movenchint.c b/libavformat/movenchint.c
index fbc7faace6..e6f74cdb0f 100644
--- a/libavformat/movenchint.c
+++ b/libavformat/movenchint.c
@@ -372,15 +372,15 @@ static int write_hint_packets(AVIOContext *out, const uint8_t *data,
         size -= packet_len;
 
         curpos = url_ftell(out);
-        url_fseek(out, entries_pos, SEEK_SET);
+        avio_seek(out, entries_pos, SEEK_SET);
         avio_wb16(out, entries);
-        url_fseek(out, curpos, SEEK_SET);
+        avio_seek(out, curpos, SEEK_SET);
     }
 
     curpos = url_ftell(out);
-    url_fseek(out, count_pos, SEEK_SET);
+    avio_seek(out, count_pos, SEEK_SET);
     avio_wb16(out, count);
-    url_fseek(out, curpos, SEEK_SET);
+    avio_seek(out, curpos, SEEK_SET);
     return count;
 }
 
diff --git a/libavformat/mp3dec.c b/libavformat/mp3dec.c
index a71638ee13..f90348c114 100644
--- a/libavformat/mp3dec.c
+++ b/libavformat/mp3dec.c
@@ -90,7 +90,7 @@ static int mp3_parse_vbr_tags(AVFormatContext *s, AVStream *st, int64_t base)
         return -1;
 
     /* Check for Xing / Info tag */
-    url_fseek(s->pb, xing_offtbl[c.lsf == 1][c.nb_channels == 1], SEEK_CUR);
+    avio_seek(s->pb, xing_offtbl[c.lsf == 1][c.nb_channels == 1], SEEK_CUR);
     v = avio_rb32(s->pb);
     if(v == MKBETAG('X', 'i', 'n', 'g') || v == MKBETAG('I', 'n', 'f', 'o')) {
         v = avio_rb32(s->pb);
@@ -101,13 +101,13 @@ static int mp3_parse_vbr_tags(AVFormatContext *s, AVStream *st, int64_t base)
     }
 
     /* Check for VBRI tag (always 32 bytes after end of mpegaudio header) */
-    url_fseek(s->pb, base + 4 + 32, SEEK_SET);
+    avio_seek(s->pb, base + 4 + 32, SEEK_SET);
     v = avio_rb32(s->pb);
     if(v == MKBETAG('V', 'B', 'R', 'I')) {
         /* Check tag version */
         if(avio_rb16(s->pb) == 1) {
             /* skip delay and quality */
-            url_fseek(s->pb, 4, SEEK_CUR);
+            avio_seek(s->pb, 4, SEEK_CUR);
             frames = avio_rb32(s->pb);
             size = avio_rb32(s->pb);
         }
@@ -117,7 +117,7 @@ static int mp3_parse_vbr_tags(AVFormatContext *s, AVStream *st, int64_t base)
         return -1;
 
     /* Skip the vbr tag frame */
-    url_fseek(s->pb, base + vbrtag_size, SEEK_SET);
+    avio_seek(s->pb, base + vbrtag_size, SEEK_SET);
 
     spf = c.lsf ? 576 : 1152; /* Samples per frame, layer 3 */
     if(frames)
@@ -153,7 +153,7 @@ static int mp3_read_header(AVFormatContext *s,
         ff_id3v1_read(s);
 
     if (mp3_parse_vbr_tags(s, st, off) < 0)
-        url_fseek(s->pb, off, SEEK_SET);
+        avio_seek(s->pb, off, SEEK_SET);
 
     /* the parameters will be extracted from the compressed bitstream */
     return 0;
diff --git a/libavformat/mp3enc.c b/libavformat/mp3enc.c
index 0635228f61..c465420691 100644
--- a/libavformat/mp3enc.c
+++ b/libavformat/mp3enc.c
@@ -238,9 +238,9 @@ static int mp3_write_header(struct AVFormatContext *s)
     }
 
     cur_pos = url_ftell(s->pb);
-    url_fseek(s->pb, size_pos, SEEK_SET);
+    avio_seek(s->pb, size_pos, SEEK_SET);
     id3v2_put_size(s, totlen);
-    url_fseek(s->pb, cur_pos, SEEK_SET);
+    avio_seek(s->pb, cur_pos, SEEK_SET);
 
     return 0;
 }
diff --git a/libavformat/mpc.c b/libavformat/mpc.c
index 73217a31ea..c22938366b 100644
--- a/libavformat/mpc.c
+++ b/libavformat/mpc.c
@@ -98,7 +98,7 @@ static int mpc_read_header(AVFormatContext *s, AVFormatParameters *ap)
         ff_ape_parse_tag(s);
         if (!av_metadata_get(s->metadata, "", NULL, AV_METADATA_IGNORE_SUFFIX))
             ff_id3v1_read(s);
-        url_fseek(s->pb, pos, SEEK_SET);
+        avio_seek(s->pb, pos, SEEK_SET);
     }
 
     return 0;
@@ -114,7 +114,7 @@ static int mpc_read_packet(AVFormatContext *s, AVPacket *pkt)
         return -1;
 
     if(c->curframe != c->lastframe + 1){
-        url_fseek(s->pb, c->frames[c->curframe].pos, SEEK_SET);
+        avio_seek(s->pb, c->frames[c->curframe].pos, SEEK_SET);
         c->curbits = c->frames[c->curframe].skip;
     }
     c->lastframe = c->curframe;
@@ -129,7 +129,7 @@ static int mpc_read_packet(AVFormatContext *s, AVPacket *pkt)
         size2 = (tmp >> (44 - curbits)) & 0xFFFFF;
     }
     curbits += 20;
-    url_fseek(s->pb, pos, SEEK_SET);
+    avio_seek(s->pb, pos, SEEK_SET);
 
     size = ((size2 + curbits + 31) & ~31) >> 3;
     if(cur == c->frames_noted){
@@ -153,7 +153,7 @@ static int mpc_read_packet(AVFormatContext *s, AVPacket *pkt)
     pkt->pts = cur;
     ret = avio_read(s->pb, pkt->data + 4, size);
     if(c->curbits)
-        url_fseek(s->pb, -4, SEEK_CUR);
+        avio_seek(s->pb, -4, SEEK_CUR);
     if(ret < size){
         av_free_packet(pkt);
         return AVERROR(EIO);
diff --git a/libavformat/mpc8.c b/libavformat/mpc8.c
index 22439f94a0..893fb6b191 100644
--- a/libavformat/mpc8.c
+++ b/libavformat/mpc8.c
@@ -135,7 +135,7 @@ static void mpc8_parse_seektable(AVFormatContext *s, int64_t off)
     int i, t, seekd;
     GetBitContext gb;
 
-    url_fseek(s->pb, off, SEEK_SET);
+    avio_seek(s->pb, off, SEEK_SET);
     mpc8_get_chunk_header(s->pb, &tag, &size);
     if(tag != TAG_SEEKTABLE){
         av_log(s, AV_LOG_ERROR, "No seek table at given position\n");
@@ -179,7 +179,7 @@ static void mpc8_handle_chunk(AVFormatContext *s, int tag, int64_t chunk_pos, in
         pos = url_ftell(pb) + size;
         off = ff_get_v(pb);
         mpc8_parse_seektable(s, chunk_pos + off);
-        url_fseek(pb, pos, SEEK_SET);
+        avio_seek(pb, pos, SEEK_SET);
         break;
     default:
         url_fskip(pb, size);
@@ -273,7 +273,7 @@ static int mpc8_read_seek(AVFormatContext *s, int stream_index, int64_t timestam
     int index = av_index_search_timestamp(st, timestamp, flags);
 
     if(index < 0) return -1;
-    url_fseek(s->pb, st->index_entries[index].pos, SEEK_SET);
+    avio_seek(s->pb, st->index_entries[index].pos, SEEK_SET);
     c->frame = st->index_entries[index].timestamp;
     return 0;
 }
diff --git a/libavformat/mpeg.c b/libavformat/mpeg.c
index c5b6bfc727..6c7481e79c 100644
--- a/libavformat/mpeg.c
+++ b/libavformat/mpeg.c
@@ -175,7 +175,7 @@ static int find_prev_start_code(AVIOContext *pb, int *size_ptr)
     pos = pos_start - 16386;
     if (pos < 0)
         pos = 0;
-    url_fseek(pb, pos, SEEK_SET);
+    avio_seek(pb, pos, SEEK_SET);
     avio_r8(pb);
 
     pos = pos_start;
@@ -185,7 +185,7 @@ static int find_prev_start_code(AVIOContext *pb, int *size_ptr)
             start_code = -1;
             goto the_end;
         }
-        url_fseek(pb, pos, SEEK_SET);
+        avio_seek(pb, pos, SEEK_SET);
         start_code = avio_rb32(pb);
         if ((start_code & 0xffffff00) == 0x100)
             break;
@@ -244,7 +244,7 @@ static int mpegps_read_pes_header(AVFormatContext *s,
     int64_t last_sync= url_ftell(s->pb);
 
  error_redo:
-        url_fseek(s->pb, last_sync, SEEK_SET);
+        avio_seek(s->pb, last_sync, SEEK_SET);
  redo:
         /* next start code (should be immediately after) */
         m->header_state = 0xff;
@@ -475,7 +475,7 @@ static int mpegps_read_packet(AVFormatContext *s,
         static const unsigned char avs_seqh[4] = { 0, 0, 1, 0xb0 };
         unsigned char buf[8];
         avio_read(s->pb, buf, 8);
-        url_fseek(s->pb, -8, SEEK_CUR);
+        avio_seek(s->pb, -8, SEEK_CUR);
         if(!memcmp(buf, avs_seqh, 4) && (buf[6] != 0 || buf[7] != 1))
             codec_id = CODEC_ID_CAVS;
         else
@@ -587,7 +587,7 @@ static int64_t mpegps_read_dts(AVFormatContext *s, int stream_index,
 #ifdef DEBUG_SEEK
     printf("read_dts: pos=0x%"PRIx64" next=%d -> ", pos, find_next);
 #endif
-    if (url_fseek(s->pb, pos, SEEK_SET) < 0)
+    if (avio_seek(s->pb, pos, SEEK_SET) < 0)
         return AV_NOPTS_VALUE;
 
     for(;;) {
diff --git a/libavformat/mpegts.c b/libavformat/mpegts.c
index 3307685b41..6a1b77301b 100644
--- a/libavformat/mpegts.c
+++ b/libavformat/mpegts.c
@@ -1316,7 +1316,7 @@ static int mpegts_resync(AVFormatContext *s)
         if (c < 0)
             return -1;
         if (c == 0x47) {
-            url_fseek(pb, -1, SEEK_CUR);
+            avio_seek(pb, -1, SEEK_CUR);
             return 0;
         }
     }
@@ -1338,7 +1338,7 @@ static int read_packet(AVFormatContext *s, uint8_t *buf, int raw_packet_size)
         /* check paquet sync byte */
         if (buf[0] != 0x47) {
             /* find a new packet start */
-            url_fseek(pb, -TS_PACKET_SIZE, SEEK_CUR);
+            avio_seek(pb, -TS_PACKET_SIZE, SEEK_CUR);
             if (mpegts_resync(s) < 0)
                 return AVERROR(EAGAIN);
             else
@@ -1468,7 +1468,7 @@ static int mpegts_read_header(AVFormatContext *s,
         /* normal demux */
 
         /* first do a scaning to get all the services */
-        if (url_fseek(pb, pos, SEEK_SET) < 0)
+        if (avio_seek(pb, pos, SEEK_SET) < 0)
             av_log(s, AV_LOG_ERROR, "Unable to seek back to the start\n");
 
         mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
@@ -1533,7 +1533,7 @@ static int mpegts_read_header(AVFormatContext *s,
 #endif
     }
 
-    url_fseek(pb, pos, SEEK_SET);
+    avio_seek(pb, pos, SEEK_SET);
     return 0;
  fail:
     return -1;
@@ -1564,7 +1564,7 @@ static int mpegts_raw_read_packet(AVFormatContext *s,
             /* we read the next PCR (XXX: optimize it by using a bigger buffer */
             pos = url_ftell(s->pb);
             for(i = 0; i < MAX_PACKET_READAHEAD; i++) {
-                url_fseek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET);
+                avio_seek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET);
                 avio_read(s->pb, pcr_buf, 12);
                 if (parse_pcr(&next_pcr_h, &next_pcr_l, pcr_buf) == 0) {
                     /* XXX: not precise enough */
@@ -1573,7 +1573,7 @@ static int mpegts_raw_read_packet(AVFormatContext *s,
                     break;
                 }
             }
-            url_fseek(s->pb, pos, SEEK_SET);
+            avio_seek(s->pb, pos, SEEK_SET);
             /* no next PCR found: we use previous increment */
             ts->cur_pcr = pcr_h * 300 + pcr_l;
         }
@@ -1649,7 +1649,7 @@ static int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
     pos = ((*ppos  + ts->raw_packet_size - 1 - ts->pos47) / ts->raw_packet_size) * ts->raw_packet_size + ts->pos47;
     if (find_next) {
         for(;;) {
-            url_fseek(s->pb, pos, SEEK_SET);
+            avio_seek(s->pb, pos, SEEK_SET);
             if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
                 return AV_NOPTS_VALUE;
             if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
@@ -1663,7 +1663,7 @@ static int64_t mpegts_get_pcr(AVFormatContext *s, int stream_index,
             pos -= ts->raw_packet_size;
             if (pos < 0)
                 return AV_NOPTS_VALUE;
-            url_fseek(s->pb, pos, SEEK_SET);
+            avio_seek(s->pb, pos, SEEK_SET);
             if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
                 return AV_NOPTS_VALUE;
             if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
@@ -1774,14 +1774,14 @@ static int read_seek(AVFormatContext *s, int stream_index, int64_t target_ts, in
     pos= url_ftell(s->pb);
 
     for(;;) {
-        url_fseek(s->pb, pos, SEEK_SET);
+        avio_seek(s->pb, pos, SEEK_SET);
         if (avio_read(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
             return -1;
 //        pid = AV_RB16(buf + 1) & 0x1fff;
         if(buf[1] & 0x40) break;
         pos += ts->raw_packet_size;
     }
-    url_fseek(s->pb, pos, SEEK_SET);
+    avio_seek(s->pb, pos, SEEK_SET);
 
     return 0;
 }
diff --git a/libavformat/mtv.c b/libavformat/mtv.c
index 94d8aff548..af1a8f01ce 100644
--- a/libavformat/mtv.c
+++ b/libavformat/mtv.c
@@ -146,7 +146,7 @@ static int mtv_read_header(AVFormatContext *s, AVFormatParameters *ap)
 
     // Jump over header
 
-    if(url_fseek(pb, MTV_HEADER_SIZE, SEEK_SET) != MTV_HEADER_SIZE)
+    if(avio_seek(pb, MTV_HEADER_SIZE, SEEK_SET) != MTV_HEADER_SIZE)
         return AVERROR(EIO);
 
     return 0;
diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c
index 9f694e30ff..3810c0cc63 100644
--- a/libavformat/mxfdec.c
+++ b/libavformat/mxfdec.c
@@ -897,7 +897,7 @@ static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, MXFMetadataReadF
         else if (read_child(ctx, pb, tag, size, uid) < 0)
             return -1;
 
-        url_fseek(pb, next, SEEK_SET);
+        avio_seek(pb, next, SEEK_SET);
     }
     if (ctx_size) ctx->type = type;
     return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
@@ -912,7 +912,7 @@ static int mxf_read_header(AVFormatContext *s, AVFormatParameters *ap)
         av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
         return -1;
     }
-    url_fseek(s->pb, -14, SEEK_CUR);
+    avio_seek(s->pb, -14, SEEK_CUR);
     mxf->fc = s;
     while (!url_feof(s->pb)) {
         const MXFMetadataReadTableEntry *metadata;
@@ -924,7 +924,7 @@ static int mxf_read_header(AVFormatContext *s, AVFormatParameters *ap)
         if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
             IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
             /* FIXME avoid seek */
-            url_fseek(s->pb, klv.offset, SEEK_SET);
+            avio_seek(s->pb, klv.offset, SEEK_SET);
             break;
         }
 
@@ -1009,7 +1009,7 @@ static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_ti
     if (sample_time < 0)
         sample_time = 0;
     seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
-    url_fseek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET);
+    avio_seek(s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET);
     av_update_cur_dts(s, st, sample_time);
     return 0;
 }
diff --git a/libavformat/mxfenc.c b/libavformat/mxfenc.c
index 9e63531388..395d7c392d 100644
--- a/libavformat/mxfenc.c
+++ b/libavformat/mxfenc.c
@@ -1267,9 +1267,9 @@ static void mxf_write_partition(AVFormatContext *s, int bodysid,
         header_byte_count = pos - start + klv_fill_size(pos);
 
         // update header_byte_count
-        url_fseek(pb, header_byte_count_offset, SEEK_SET);
+        avio_seek(pb, header_byte_count_offset, SEEK_SET);
         avio_wb64(pb, header_byte_count);
-        url_fseek(pb, pos, SEEK_SET);
+        avio_seek(pb, pos, SEEK_SET);
     }
 
     put_flush_packet(pb);
@@ -1785,7 +1785,7 @@ static int mxf_write_footer(AVFormatContext *s)
     mxf_write_random_index_pack(s);
 
     if (!url_is_streamed(s->pb)) {
-        url_fseek(pb, 0, SEEK_SET);
+        avio_seek(pb, 0, SEEK_SET);
         if (mxf->edit_unit_byte_count) {
             mxf_write_partition(s, 1, 2, header_closed_partition_key, 1);
             mxf_write_klv_fill(s);
diff --git a/libavformat/nsvdec.c b/libavformat/nsvdec.c
index 6ac8866144..dfd5e0fc78 100644
--- a/libavformat/nsvdec.c
+++ b/libavformat/nsvdec.c
@@ -364,7 +364,7 @@ static int nsv_parse_NSVf_header(AVFormatContext *s, AVFormatParameters *ap)
     av_dlog(s, "NSV [dataoffset][fileoffset]\n", table_entries);
     for (i = 0; i < table_entries; i++) {
         unsigned char b[8];
-        url_fseek(pb, size + nsv->nsvs_file_offset[i], SEEK_SET);
+        avio_seek(pb, size + nsv->nsvs_file_offset[i], SEEK_SET);
         avio_read(pb, b, 8);
         av_dlog(s, "NSV [0x%08lx][0x%08lx]: %02x %02x %02x %02x %02x %02x %02x %02x"
            "%c%c%c%c%c%c%c%c\n",
@@ -372,11 +372,11 @@ static int nsv_parse_NSVf_header(AVFormatContext *s, AVFormatParameters *ap)
            b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7],
            V(b[0]), V(b[1]), V(b[2]), V(b[3]), V(b[4]), V(b[5]), V(b[6]), V(b[7]) );
     }
-    //url_fseek(pb, size, SEEK_SET); /* go back to end of header */
+    //avio_seek(pb, size, SEEK_SET); /* go back to end of header */
 #undef V
 #endif
 
-    url_fseek(pb, nsv->base_offset + size, SEEK_SET); /* required for dumbdriving-271.nsv (2 extra bytes) */
+    avio_seek(pb, nsv->base_offset + size, SEEK_SET); /* required for dumbdriving-271.nsv (2 extra bytes) */
 
     if (url_feof(pb))
         return -1;
@@ -700,7 +700,7 @@ static int nsv_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp
     if(index < 0)
         return -1;
 
-    url_fseek(s->pb, st->index_entries[index].pos, SEEK_SET);
+    avio_seek(s->pb, st->index_entries[index].pos, SEEK_SET);
     nst->frame_offset = st->index_entries[index].timestamp;
     nsv->state = NSV_UNSYNC;
     return 0;
diff --git a/libavformat/nutdec.c b/libavformat/nutdec.c
index a2e6ec17f1..7920b0d13f 100644
--- a/libavformat/nutdec.c
+++ b/libavformat/nutdec.c
@@ -119,7 +119,7 @@ static uint64_t find_any_startcode(AVIOContext *bc, int64_t pos){
     uint64_t state=0;
 
     if(pos >= 0)
-        url_fseek(bc, pos, SEEK_SET); //note, this may fail if the stream is not seekable, but that should not matter, as in this case we simply start where we currently are
+        avio_seek(bc, pos, SEEK_SET); //note, this may fail if the stream is not seekable, but that should not matter, as in this case we simply start where we currently are
 
     while(!url_feof(bc)){
         state= (state<<8) | avio_r8(bc);
@@ -178,7 +178,7 @@ static int nut_probe(AVProbeData *p){
 static int skip_reserved(AVIOContext *bc, int64_t pos){
     pos -= url_ftell(bc);
     if(pos<0){
-        url_fseek(bc, pos, SEEK_CUR);
+        avio_seek(bc, pos, SEEK_CUR);
         return -1;
     }else{
         while(pos--)
@@ -513,8 +513,8 @@ static int find_and_decode_index(NUTContext *nut){
     int8_t *has_keyframe;
     int ret= -1;
 
-    url_fseek(bc, filesize-12, SEEK_SET);
-    url_fseek(bc, filesize-avio_rb64(bc), SEEK_SET);
+    avio_seek(bc, filesize-12, SEEK_SET);
+    avio_seek(bc, filesize-avio_rb64(bc), SEEK_SET);
     if(avio_rb64(bc) != INDEX_STARTCODE){
         av_log(s, AV_LOG_ERROR, "no index at the end\n");
         return -1;
@@ -655,7 +655,7 @@ static int nut_read_header(AVFormatContext *s, AVFormatParameters *ap)
     if(!url_is_streamed(bc)){
         int64_t orig_pos= url_ftell(bc);
         find_and_decode_index(nut);
-        url_fseek(bc, orig_pos, SEEK_SET);
+        avio_seek(bc, orig_pos, SEEK_SET);
     }
     assert(nut->next_startcode == SYNCPOINT_STARTCODE);
 
@@ -803,7 +803,7 @@ static int nut_read_packet(AVFormatContext *s, AVPacket *pkt)
         case STREAM_STARTCODE:
         case INDEX_STARTCODE:
             skip= get_packetheader(nut, bc, 0, tmp);
-            url_fseek(bc, skip, SEEK_CUR);
+            avio_seek(bc, skip, SEEK_CUR);
             break;
         case INFO_STARTCODE:
             if(decode_info_header(nut)<0)
@@ -900,7 +900,7 @@ static int read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flag
     }
     av_log(NULL, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos2);
     pos= find_startcode(s->pb, SYNCPOINT_STARTCODE, pos2);
-    url_fseek(s->pb, pos, SEEK_SET);
+    avio_seek(s->pb, pos, SEEK_SET);
     av_log(NULL, AV_LOG_DEBUG, "SP: %"PRId64"\n", pos);
     if(pos2 > pos || pos2 + 15 < pos){
         av_log(NULL, AV_LOG_ERROR, "no syncpoint at backptr pos\n");
diff --git a/libavformat/oggdec.c b/libavformat/oggdec.c
index a79cd3ef9d..af9860bf53 100644
--- a/libavformat/oggdec.c
+++ b/libavformat/oggdec.c
@@ -97,7 +97,7 @@ ogg_restore (AVFormatContext * s, int discard)
         for (i = 0; i < ogg->nstreams; i++)
             av_free (ogg->streams[i].buf);
 
-        url_fseek (bc, ost->pos, SEEK_SET);
+        avio_seek (bc, ost->pos, SEEK_SET);
         ogg->curidx = ost->curidx;
         ogg->nstreams = ost->nstreams;
         memcpy(ogg->streams, ost->streams,
@@ -468,7 +468,7 @@ ogg_get_length (AVFormatContext * s)
     end = size > MAX_PAGE_SIZE? size - MAX_PAGE_SIZE: 0;
 
     ogg_save (s);
-    url_fseek (s->pb, end, SEEK_SET);
+    avio_seek (s->pb, end, SEEK_SET);
 
     while (!ogg_read_page (s, &i)){
         if (ogg->streams[i].granule != -1 && ogg->streams[i].granule != 0 &&
@@ -604,7 +604,7 @@ ogg_read_timestamp (AVFormatContext * s, int stream_index, int64_t * pos_arg,
     AVIOContext *bc = s->pb;
     int64_t pts = AV_NOPTS_VALUE;
     int i;
-    url_fseek(bc, *pos_arg, SEEK_SET);
+    avio_seek(bc, *pos_arg, SEEK_SET);
     ogg_reset(ogg);
 
     while (url_ftell(bc) < pos_limit && !ogg_packet(s, &i, NULL, NULL, pos_arg)) {
diff --git a/libavformat/oggenc.c b/libavformat/oggenc.c
index fc4010d3b8..92591dde12 100644
--- a/libavformat/oggenc.c
+++ b/libavformat/oggenc.c
@@ -69,9 +69,9 @@ static void ogg_update_checksum(AVFormatContext *s, AVIOContext *pb, int64_t crc
 {
     int64_t pos = url_ftell(pb);
     uint32_t checksum = get_checksum(pb);
-    url_fseek(pb, crc_offset, SEEK_SET);
+    avio_seek(pb, crc_offset, SEEK_SET);
     avio_wb32(pb, checksum);
-    url_fseek(pb, pos, SEEK_SET);
+    avio_seek(pb, pos, SEEK_SET);
 }
 
 static int ogg_write_page(AVFormatContext *s, OGGPage *page, int extra_flags)
diff --git a/libavformat/pcm.c b/libavformat/pcm.c
index 5de23af1cb..def183c5b2 100644
--- a/libavformat/pcm.c
+++ b/libavformat/pcm.c
@@ -49,7 +49,7 @@ int pcm_read_seek(AVFormatContext *s,
 
     /* recompute exact position */
     st->cur_dts = av_rescale(pos, st->time_base.den, byte_rate * (int64_t)st->time_base.num);
-    if ((ret = url_fseek(s->pb, pos + s->data_offset, SEEK_SET)) < 0)
+    if ((ret = avio_seek(s->pb, pos + s->data_offset, SEEK_SET)) < 0)
         return ret;
     return 0;
 }
diff --git a/libavformat/psxstr.c b/libavformat/psxstr.c
index 69013c5f58..a0dc531ae6 100644
--- a/libavformat/psxstr.c
+++ b/libavformat/psxstr.c
@@ -112,7 +112,7 @@ static int str_read_header(AVFormatContext *s,
     else
         start = 0;
 
-    url_fseek(pb, start, SEEK_SET);
+    avio_seek(pb, start, SEEK_SET);
 
     for(i=0; i<32; i++){
         str->channels[i].video_stream_index=
diff --git a/libavformat/pva.c b/libavformat/pva.c
index ea7db47c76..f781026c1c 100644
--- a/libavformat/pva.c
+++ b/libavformat/pva.c
@@ -182,7 +182,7 @@ static int64_t pva_read_timestamp(struct AVFormatContext *s, int stream_index,
 
     while (*pos < pos_limit) {
         res = AV_NOPTS_VALUE;
-        url_fseek(pb, *pos, SEEK_SET);
+        avio_seek(pb, *pos, SEEK_SET);
 
         pvactx->continue_pes = 0;
         if (read_part_of_packet(s, &res, &length, &streamid, 0)) {
diff --git a/libavformat/r3d.c b/libavformat/r3d.c
index bb39e03e50..63ed26cee3 100644
--- a/libavformat/r3d.c
+++ b/libavformat/r3d.c
@@ -180,7 +180,7 @@ static int r3d_read_header(AVFormatContext *s, AVFormatParameters *ap)
     if (url_is_streamed(s->pb))
         return 0;
     // find REOB/REOF/REOS to load index
-    url_fseek(s->pb, url_fsize(s->pb)-48-8, SEEK_SET);
+    avio_seek(s->pb, url_fsize(s->pb)-48-8, SEEK_SET);
     if (read_atom(s, &atom) < 0)
         av_log(s, AV_LOG_ERROR, "error reading end atom\n");
 
@@ -192,7 +192,7 @@ static int r3d_read_header(AVFormatContext *s, AVFormatParameters *ap)
     r3d_read_reos(s);
 
     if (r3d->rdvo_offset) {
-        url_fseek(s->pb, r3d->rdvo_offset, SEEK_SET);
+        avio_seek(s->pb, r3d->rdvo_offset, SEEK_SET);
         if (read_atom(s, &atom) < 0)
             av_log(s, AV_LOG_ERROR, "error reading 'rdvo' atom\n");
         if (atom.tag == MKTAG('R','D','V','O')) {
@@ -202,7 +202,7 @@ static int r3d_read_header(AVFormatContext *s, AVFormatParameters *ap)
     }
 
  out:
-    url_fseek(s->pb, s->data_offset, SEEK_SET);
+    avio_seek(s->pb, s->data_offset, SEEK_SET);
     return 0;
 }
 
@@ -359,7 +359,7 @@ static int r3d_seek(AVFormatContext *s, int stream_index, int64_t sample_time, i
     av_dlog(s, "seek frame num %d timestamp %lld\n", frame_num, sample_time);
 
     if (frame_num < r3d->video_offsets_count) {
-        url_fseek(s->pb, r3d->video_offsets_count, SEEK_SET);
+        avio_seek(s->pb, r3d->video_offsets_count, SEEK_SET);
     } else {
         av_log(s, AV_LOG_ERROR, "could not seek to frame %d\n", frame_num);
         return -1;
diff --git a/libavformat/rdt.c b/libavformat/rdt.c
index ad84a6cbe5..022cb720ac 100644
--- a/libavformat/rdt.c
+++ b/libavformat/rdt.c
@@ -174,7 +174,7 @@ rdt_load_mdpr (PayloadContext *rdt, AVStream *st, int rule_nr)
         size = avio_rb32(&pb);
     } else {
         size = rdt->mlti_data_size;
-        url_fseek(&pb, 0, SEEK_SET);
+        avio_seek(&pb, 0, SEEK_SET);
     }
     if (ff_rm_read_mdpr_codecdata(rdt->rmctx, &pb, st, rdt->rmst[st->index], size) < 0)
         return -1;
diff --git a/libavformat/riff.c b/libavformat/riff.c
index 4e21b1c841..9fd5c50609 100644
--- a/libavformat/riff.c
+++ b/libavformat/riff.c
@@ -332,9 +332,9 @@ void ff_end_tag(AVIOContext *pb, int64_t start)
     int64_t pos;
 
     pos = url_ftell(pb);
-    url_fseek(pb, start - 4, SEEK_SET);
+    avio_seek(pb, start - 4, SEEK_SET);
     avio_wl32(pb, (uint32_t)(pos - start));
-    url_fseek(pb, pos, SEEK_SET);
+    avio_seek(pb, pos, SEEK_SET);
 }
 
 /* WAVEFORMATEX header */
diff --git a/libavformat/rl2.c b/libavformat/rl2.c
index 16e029f679..eb1ef1285e 100644
--- a/libavformat/rl2.c
+++ b/libavformat/rl2.c
@@ -237,7 +237,7 @@ static int rl2_read_packet(AVFormatContext *s,
     ++rl2->index_pos[stream_id];
 
     /** position the stream (will probably be there anyway) */
-    url_fseek(pb, sample->pos, SEEK_SET);
+    avio_seek(pb, sample->pos, SEEK_SET);
 
     /** fill the packet */
     ret = av_get_packet(pb, pkt, sample->size);
diff --git a/libavformat/rmdec.c b/libavformat/rmdec.c
index c34d128e40..4d7c763db4 100644
--- a/libavformat/rmdec.c
+++ b/libavformat/rmdec.c
@@ -363,7 +363,7 @@ static int rm_read_index(AVFormatContext *s)
 
 skip:
         if (next_off && url_ftell(pb) != next_off &&
-            url_fseek(pb, next_off, SEEK_SET) < 0)
+            avio_seek(pb, next_off, SEEK_SET) < 0)
             return -1;
     } while (next_off);
 
@@ -482,9 +482,9 @@ static int rm_read_header(AVFormatContext *s, AVFormatParameters *ap)
     if (!data_off)
         data_off = url_ftell(pb) - 18;
     if (indx_off && !url_is_streamed(pb) && !(s->flags & AVFMT_FLAG_IGNIDX) &&
-        url_fseek(pb, indx_off, SEEK_SET) >= 0) {
+        avio_seek(pb, indx_off, SEEK_SET) >= 0) {
         rm_read_index(s);
-        url_fseek(pb, data_off + 18, SEEK_SET);
+        avio_seek(pb, data_off + 18, SEEK_SET);
     }
 
     return 0;
@@ -904,7 +904,7 @@ static int64_t rm_read_dts(AVFormatContext *s, int stream_index,
     if(rm->old_format)
         return AV_NOPTS_VALUE;
 
-    url_fseek(s->pb, pos, SEEK_SET);
+    avio_seek(s->pb, pos, SEEK_SET);
     rm->remaining_len=0;
     for(;;){
         int seq=1;
diff --git a/libavformat/rmenc.c b/libavformat/rmenc.c
index 29a6a35d18..8a608861f5 100644
--- a/libavformat/rmenc.c
+++ b/libavformat/rmenc.c
@@ -436,7 +436,7 @@ static int rm_write_trailer(AVFormatContext *s)
 
     if (!url_is_streamed(s->pb)) {
         /* end of file: finish to write header */
-        index_pos = url_fseek(pb, 0, SEEK_CUR);
+        index_pos = avio_seek(pb, 0, SEEK_CUR);
         data_size = index_pos - rm->data_pos;
 
         /* FIXME: write index */
@@ -445,7 +445,7 @@ static int rm_write_trailer(AVFormatContext *s)
         avio_wb32(pb, 0);
         avio_wb32(pb, 0);
 
-        url_fseek(pb, 0, SEEK_SET);
+        avio_seek(pb, 0, SEEK_SET);
         for(i=0;i<s->nb_streams;i++)
             rm->streams[i].total_frames = rm->streams[i].nb_frames;
         rv10_write_header(s, data_size, 0);
diff --git a/libavformat/rpl.c b/libavformat/rpl.c
index 5c0a21fe90..9702fc7035 100644
--- a/libavformat/rpl.c
+++ b/libavformat/rpl.c
@@ -250,7 +250,7 @@ static int rpl_read_header(AVFormatContext *s, AVFormatParameters *ap)
     error |= read_line(pb, line, sizeof(line));  // offset to key frame list
 
     // Read the index
-    url_fseek(pb, chunk_catalog_offset, SEEK_SET);
+    avio_seek(pb, chunk_catalog_offset, SEEK_SET);
     total_audio_size = 0;
     for (i = 0; i < number_of_chunks; i++) {
         int64_t offset, video_size, audio_size;
@@ -292,7 +292,7 @@ static int rpl_read_packet(AVFormatContext *s, AVPacket *pkt)
     index_entry = &stream->index_entries[rpl->chunk_number];
 
     if (rpl->frame_in_part == 0)
-        if (url_fseek(pb, index_entry->pos, SEEK_SET) < 0)
+        if (avio_seek(pb, index_entry->pos, SEEK_SET) < 0)
             return AVERROR(EIO);
 
     if (stream->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
@@ -303,7 +303,7 @@ static int rpl_read_packet(AVFormatContext *s, AVPacket *pkt)
 
         frame_flags = avio_rl32(pb);
         frame_size = avio_rl32(pb);
-        if (url_fseek(pb, -8, SEEK_CUR) < 0)
+        if (avio_seek(pb, -8, SEEK_CUR) < 0)
             return AVERROR(EIO);
 
         ret = av_get_packet(pb, pkt, frame_size);
diff --git a/libavformat/rsoenc.c b/libavformat/rsoenc.c
index 9c5ee9bd62..c776a1ac2a 100644
--- a/libavformat/rsoenc.c
+++ b/libavformat/rsoenc.c
@@ -91,9 +91,9 @@ static int rso_write_trailer(AVFormatContext *s)
     }
 
     /* update file size */
-    url_fseek(pb, 2, SEEK_SET);
+    avio_seek(pb, 2, SEEK_SET);
     avio_wb16(pb, coded_file_size);
-    url_fseek(pb, file_size, SEEK_SET);
+    avio_seek(pb, file_size, SEEK_SET);
 
     put_flush_packet(pb);
 
diff --git a/libavformat/rtpdec_qt.c b/libavformat/rtpdec_qt.c
index 24052a2357..7476bb944e 100644
--- a/libavformat/rtpdec_qt.c
+++ b/libavformat/rtpdec_qt.c
@@ -103,7 +103,7 @@ static int qt_rtp_parse_packet(AVFormatContext *s, PayloadContext *qt,
         skip_bits(&gb, 12); // reserved
         data_len = get_bits(&gb, 16);
 
-        url_fseek(&pb, pos + 4, SEEK_SET);
+        avio_seek(&pb, pos + 4, SEEK_SET);
         tag = avio_rl32(&pb);
         if ((st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
                  tag != MKTAG('v','i','d','e')) ||
@@ -157,7 +157,7 @@ static int qt_rtp_parse_packet(AVFormatContext *s, PayloadContext *qt,
         /* 32-bit alignment */
         url_fskip(&pb, ((url_ftell(&pb) + 3) & ~3) - url_ftell(&pb));
     } else
-        url_fseek(&pb, 4, SEEK_SET);
+        avio_seek(&pb, 4, SEEK_SET);
 
     if (has_packet_info) {
         av_log_missing_feature(s, "RTP-X-QT with packet specific info", 1);
diff --git a/libavformat/sauce.c b/libavformat/sauce.c
index e861b14e16..f4ebc2fe68 100644
--- a/libavformat/sauce.c
+++ b/libavformat/sauce.c
@@ -35,7 +35,7 @@ int ff_sauce_read(AVFormatContext *avctx, uint64_t *fsize, int *got_width, int g
     int datatype, filetype, t1, t2, nb_comments, flags;
     uint64_t start_pos = url_fsize(pb) - 128;
 
-    url_fseek(pb, start_pos, SEEK_SET);
+    avio_seek(pb, start_pos, SEEK_SET);
     if (avio_read(pb, buf, 7) != 7)
         return -1;
     if (memcmp(buf, "SAUCE00", 7))
@@ -82,7 +82,7 @@ int ff_sauce_read(AVFormatContext *avctx, uint64_t *fsize, int *got_width, int g
     *fsize -= 128;
 
     if (nb_comments > 0) {
-        url_fseek(pb, start_pos - 64*nb_comments - 5, SEEK_SET);
+        avio_seek(pb, start_pos - 64*nb_comments - 5, SEEK_SET);
         if (avio_read(pb, buf, 5) == 5 && !memcmp(buf, "COMNT", 5)) {
             int i;
             char *str = av_malloc(65*nb_comments + 1);
diff --git a/libavformat/seek.c b/libavformat/seek.c
index 26b622f035..9fee91101c 100644
--- a/libavformat/seek.c
+++ b/libavformat/seek.c
@@ -313,7 +313,7 @@ int64_t ff_gen_syncpoint_search(AVFormatContext *s,
     step = s->pb->buffer_size;
     curpos = FFMAX(pos - step / 2, 0);
     for (;;) {
-        url_fseek(s->pb, curpos, SEEK_SET);
+        avio_seek(s->pb, curpos, SEEK_SET);
         search_hi_lo_keyframes(s,
                                ts, time_base,
                                flags,
@@ -385,7 +385,7 @@ int64_t ff_gen_syncpoint_search(AVFormatContext *s,
         }
     }
 
-    url_fseek(s->pb, pos, SEEK_SET);
+    avio_seek(s->pb, pos, SEEK_SET);
     av_free(sync);
     return pos;
 }
@@ -456,7 +456,7 @@ void ff_restore_parser_state(AVFormatContext *s, AVParserState *state)
     if (!state)
         return;
 
-    url_fseek(s->pb, state->fpos, SEEK_SET);
+    avio_seek(s->pb, state->fpos, SEEK_SET);
 
     // copy context structures
     s->cur_st                           = state->cur_st;
diff --git a/libavformat/segafilm.c b/libavformat/segafilm.c
index 906cb915ad..7b689906cc 100644
--- a/libavformat/segafilm.c
+++ b/libavformat/segafilm.c
@@ -217,7 +217,7 @@ static int film_read_packet(AVFormatContext *s,
     sample = &film->sample_table[film->current_sample];
 
     /* position the stream (will probably be there anyway) */
-    url_fseek(pb, sample->sample_offset, SEEK_SET);
+    avio_seek(pb, sample->sample_offset, SEEK_SET);
 
     /* do a special song and dance when loading FILM Cinepak chunks */
     if ((sample->stream == film->video_stream_index) &&
diff --git a/libavformat/sierravmd.c b/libavformat/sierravmd.c
index 323938639c..778746594a 100644
--- a/libavformat/sierravmd.c
+++ b/libavformat/sierravmd.c
@@ -95,7 +95,7 @@ static int vmd_read_header(AVFormatContext *s,
     int sound_buffers;
 
     /* fetch the main header, including the 2 header length bytes */
-    url_fseek(pb, 0, SEEK_SET);
+    avio_seek(pb, 0, SEEK_SET);
     if (avio_read(pb, vmd->vmd_header, VMD_HEADER_SIZE) != VMD_HEADER_SIZE)
         return AVERROR(EIO);
 
@@ -155,7 +155,7 @@ static int vmd_read_header(AVFormatContext *s,
     toc_offset = AV_RL32(&vmd->vmd_header[812]);
     vmd->frame_count = AV_RL16(&vmd->vmd_header[6]);
     vmd->frames_per_block = AV_RL16(&vmd->vmd_header[18]);
-    url_fseek(pb, toc_offset, SEEK_SET);
+    avio_seek(pb, toc_offset, SEEK_SET);
 
     raw_frame_table = NULL;
     vmd->frame_table = NULL;
@@ -243,7 +243,7 @@ static int vmd_read_packet(AVFormatContext *s,
 
     frame = &vmd->frame_table[vmd->current_frame];
     /* position the stream (will probably be there already) */
-    url_fseek(pb, frame->frame_offset, SEEK_SET);
+    avio_seek(pb, frame->frame_offset, SEEK_SET);
 
     if (av_new_packet(pkt, frame->frame_size + BYTES_PER_FRAME_RECORD))
         return AVERROR(ENOMEM);
diff --git a/libavformat/smacker.c b/libavformat/smacker.c
index 42d3672d79..8feb4e5f69 100644
--- a/libavformat/smacker.c
+++ b/libavformat/smacker.c
@@ -240,7 +240,7 @@ static int smacker_read_packet(AVFormatContext *s, AVPacket *pkt)
 
     /* if we demuxed all streams, pass another frame */
     if(smk->curstream < 0) {
-        url_fseek(s->pb, smk->nextpos, 0);
+        avio_seek(s->pb, smk->nextpos, 0);
         frame_size = smk->frm_size[smk->cur_frame] & (~3);
         flags = smk->frm_flags[smk->cur_frame];
         /* handle palette change event */
@@ -279,7 +279,7 @@ static int smacker_read_packet(AVFormatContext *s, AVPacket *pkt)
                     sz++;
                 }
             }
-            url_fseek(s->pb, pos, 0);
+            avio_seek(s->pb, pos, 0);
             palchange |= 1;
         }
         flags >>= 1;
diff --git a/libavformat/soxenc.c b/libavformat/soxenc.c
index 9c06dd7ea3..dbb2972ead 100644
--- a/libavformat/soxenc.c
+++ b/libavformat/soxenc.c
@@ -100,12 +100,12 @@ static int sox_write_trailer(AVFormatContext *s)
         /* update number of samples */
         int64_t file_size = url_ftell(pb);
         int64_t num_samples = (file_size - sox->header_size - 4LL) >> 2LL;
-        url_fseek(pb, 8, SEEK_SET);
+        avio_seek(pb, 8, SEEK_SET);
         if (enc->codec_id == CODEC_ID_PCM_S32LE) {
             avio_wl64(pb, num_samples);
         } else
             avio_wb64(pb, num_samples);
-        url_fseek(pb, file_size, SEEK_SET);
+        avio_seek(pb, file_size, SEEK_SET);
 
         put_flush_packet(pb);
     }
diff --git a/libavformat/swfenc.c b/libavformat/swfenc.c
index 296b9c27d9..c898c0ec5f 100644
--- a/libavformat/swfenc.c
+++ b/libavformat/swfenc.c
@@ -50,7 +50,7 @@ static void put_swf_end_tag(AVFormatContext *s)
     pos = url_ftell(pb);
     tag_len = pos - swf->tag_pos - 2;
     tag = swf->tag;
-    url_fseek(pb, swf->tag_pos, SEEK_SET);
+    avio_seek(pb, swf->tag_pos, SEEK_SET);
     if (tag & TAG_LONG) {
         tag &= ~TAG_LONG;
         avio_wl16(pb, (tag << 6) | 0x3f);
@@ -59,7 +59,7 @@ static void put_swf_end_tag(AVFormatContext *s)
         assert(tag_len < 0x3f);
         avio_wl16(pb, (tag << 6) | tag_len);
     }
-    url_fseek(pb, pos, SEEK_SET);
+    avio_seek(pb, pos, SEEK_SET);
 }
 
 static inline void max_nbits(int *nbits_ptr, int val)
@@ -494,13 +494,13 @@ static int swf_write_trailer(AVFormatContext *s)
     /* patch file size and number of frames if not streamed */
     if (!url_is_streamed(s->pb) && video_enc) {
         file_size = url_ftell(pb);
-        url_fseek(pb, 4, SEEK_SET);
+        avio_seek(pb, 4, SEEK_SET);
         avio_wl32(pb, file_size);
-        url_fseek(pb, swf->duration_pos, SEEK_SET);
+        avio_seek(pb, swf->duration_pos, SEEK_SET);
         avio_wl16(pb, swf->video_frame_number);
-        url_fseek(pb, swf->vframes_pos, SEEK_SET);
+        avio_seek(pb, swf->vframes_pos, SEEK_SET);
         avio_wl16(pb, swf->video_frame_number);
-        url_fseek(pb, file_size, SEEK_SET);
+        avio_seek(pb, file_size, SEEK_SET);
     }
     return 0;
 }
diff --git a/libavformat/thp.c b/libavformat/thp.c
index 39a8bc2c35..2d1f74e38b 100644
--- a/libavformat/thp.c
+++ b/libavformat/thp.c
@@ -81,7 +81,7 @@ static int thp_read_header(AVFormatContext *s,
     thp->next_frame      = thp->first_frame;
 
     /* Read the component structure.  */
-    url_fseek (pb, thp->compoff, SEEK_SET);
+    avio_seek (pb, thp->compoff, SEEK_SET);
     thp->compcount       = avio_rb32(pb);
 
     /* Read the list of component types.  */
@@ -149,7 +149,7 @@ static int thp_read_packet(AVFormatContext *s,
         if (thp->frame >= thp->framecnt)
             return AVERROR(EIO);
 
-        url_fseek(pb, thp->next_frame, SEEK_SET);
+        avio_seek(pb, thp->next_frame, SEEK_SET);
 
         /* Locate the next frame and read out its size.  */
         thp->next_frame += thp->next_framesz;
diff --git a/libavformat/tiertexseq.c b/libavformat/tiertexseq.c
index e368b17959..f8a5db1813 100644
--- a/libavformat/tiertexseq.c
+++ b/libavformat/tiertexseq.c
@@ -83,7 +83,7 @@ static int seq_init_frame_buffers(SeqDemuxContext *seq, AVIOContext *pb)
     int i, sz;
     TiertexSeqFrameBuffer *seq_buffer;
 
-    url_fseek(pb, 256, SEEK_SET);
+    avio_seek(pb, 256, SEEK_SET);
 
     for (i = 0; i < SEQ_NUM_FRAME_BUFFERS; i++) {
         sz = avio_rl16(pb);
@@ -113,7 +113,7 @@ static int seq_fill_buffer(SeqDemuxContext *seq, AVIOContext *pb, int buffer_num
     if (seq_buffer->fill_size + data_size > seq_buffer->data_size || data_size <= 0)
         return AVERROR_INVALIDDATA;
 
-    url_fseek(pb, seq->current_frame_offs + data_offs, SEEK_SET);
+    avio_seek(pb, seq->current_frame_offs + data_offs, SEEK_SET);
     if (avio_read(pb, seq_buffer->data + seq_buffer->fill_size, data_size) != data_size)
         return AVERROR(EIO);
 
@@ -128,7 +128,7 @@ static int seq_parse_frame_data(SeqDemuxContext *seq, AVIOContext *pb)
     int i, e, err;
 
     seq->current_frame_offs += SEQ_FRAME_SIZE;
-    url_fseek(pb, seq->current_frame_offs, SEEK_SET);
+    avio_seek(pb, seq->current_frame_offs, SEEK_SET);
 
     /* sound data */
     seq->current_audio_data_offs = avio_rl16(pb);
@@ -256,7 +256,7 @@ static int seq_read_packet(AVFormatContext *s, AVPacket *pkt)
             pkt->data[0] = 0;
             if (seq->current_pal_data_size) {
                 pkt->data[0] |= 1;
-                url_fseek(pb, seq->current_frame_offs + seq->current_pal_data_offs, SEEK_SET);
+                avio_seek(pb, seq->current_frame_offs + seq->current_pal_data_offs, SEEK_SET);
                 if (avio_read(pb, &pkt->data[1], seq->current_pal_data_size) != seq->current_pal_data_size)
                     return AVERROR(EIO);
             }
@@ -279,7 +279,7 @@ static int seq_read_packet(AVFormatContext *s, AVPacket *pkt)
     if (seq->current_audio_data_offs == 0) /* end of data reached */
         return AVERROR(EIO);
 
-    url_fseek(pb, seq->current_frame_offs + seq->current_audio_data_offs, SEEK_SET);
+    avio_seek(pb, seq->current_frame_offs + seq->current_audio_data_offs, SEEK_SET);
     rc = av_get_packet(pb, pkt, seq->current_audio_data_size);
     if (rc < 0)
         return rc;
diff --git a/libavformat/tmv.c b/libavformat/tmv.c
index 3fe9e65dcc..7b0691db0f 100644
--- a/libavformat/tmv.c
+++ b/libavformat/tmv.c
@@ -173,7 +173,7 @@ static int tmv_read_seek(AVFormatContext *s, int stream_index,
     pos = timestamp *
           (tmv->audio_chunk_size + tmv->video_chunk_size + tmv->padding);
 
-    url_fseek(s->pb, pos + TMV_HEADER_SIZE, SEEK_SET);
+    avio_seek(s->pb, pos + TMV_HEADER_SIZE, SEEK_SET);
     tmv->stream_index = 0;
     return 0;
 }
diff --git a/libavformat/tta.c b/libavformat/tta.c
index 61a41df90b..42d551de35 100644
--- a/libavformat/tta.c
+++ b/libavformat/tta.c
@@ -106,7 +106,7 @@ static int tta_read_header(AVFormatContext *s, AVFormatParameters *ap)
         return -1;
     }
     st->codec->extradata = av_mallocz(st->codec->extradata_size+FF_INPUT_BUFFER_PADDING_SIZE);
-    url_fseek(s->pb, start_offset, SEEK_SET);
+    avio_seek(s->pb, start_offset, SEEK_SET);
     avio_read(s->pb, st->codec->extradata, st->codec->extradata_size);
 
     return 0;
@@ -138,7 +138,7 @@ static int tta_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp
         return -1;
 
     c->currentframe = index;
-    url_fseek(s->pb, st->index_entries[index].pos, SEEK_SET);
+    avio_seek(s->pb, st->index_entries[index].pos, SEEK_SET);
 
     return 0;
 }
diff --git a/libavformat/tty.c b/libavformat/tty.c
index 767006b5a3..74750584c1 100644
--- a/libavformat/tty.c
+++ b/libavformat/tty.c
@@ -46,7 +46,7 @@ static int efi_read(AVFormatContext *avctx, uint64_t start_pos)
     char buf[37];
     int len;
 
-    url_fseek(pb, start_pos, SEEK_SET);
+    avio_seek(pb, start_pos, SEEK_SET);
     if (avio_r8(pb) != 0x1A)
         return -1;
 
@@ -95,7 +95,7 @@ static int read_header(AVFormatContext *avctx,
         if (ff_sauce_read(avctx, &s->fsize, 0, 0) < 0)
             efi_read(avctx, s->fsize - 51);
 
-        url_fseek(avctx->pb, 0, SEEK_SET);
+        avio_seek(avctx->pb, 0, SEEK_SET);
     }
 
     return 0;
diff --git a/libavformat/utils.c b/libavformat/utils.c
index 1f0164ffac..70da4ca147 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -1531,7 +1531,7 @@ int av_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts
         return -1;
 
     /* do the seek */
-    if ((ret = url_fseek(s->pb, pos, SEEK_SET)) < 0)
+    if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0)
         return ret;
 
     av_update_cur_dts(s, st, ts);
@@ -1671,7 +1671,7 @@ static int av_seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos,
     if     (pos < pos_min) pos= pos_min;
     else if(pos > pos_max) pos= pos_max;
 
-    url_fseek(s->pb, pos, SEEK_SET);
+    avio_seek(s->pb, pos, SEEK_SET);
 
 #if 0
     av_update_cur_dts(s, st, ts);
@@ -1701,11 +1701,11 @@ static int av_seek_frame_generic(AVFormatContext *s,
         if(st->nb_index_entries){
             assert(st->index_entries);
             ie= &st->index_entries[st->nb_index_entries-1];
-            if ((ret = url_fseek(s->pb, ie->pos, SEEK_SET)) < 0)
+            if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
                 return ret;
             av_update_cur_dts(s, st, ie->timestamp);
         }else{
-            if ((ret = url_fseek(s->pb, s->data_offset, SEEK_SET)) < 0)
+            if ((ret = avio_seek(s->pb, s->data_offset, SEEK_SET)) < 0)
                 return ret;
         }
         for(i=0;; i++) {
@@ -1732,7 +1732,7 @@ static int av_seek_frame_generic(AVFormatContext *s,
             return 0;
     }
     ie = &st->index_entries[index];
-    if ((ret = url_fseek(s->pb, ie->pos, SEEK_SET)) < 0)
+    if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
         return ret;
     av_update_cur_dts(s, st, ie->timestamp);
 
@@ -1956,7 +1956,7 @@ static void av_estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset
     if (offset < 0)
         offset = 0;
 
-    url_fseek(ic->pb, offset, SEEK_SET);
+    avio_seek(ic->pb, offset, SEEK_SET);
     read_size = 0;
     for(;;) {
         if (read_size >= DURATION_MAX_READ_SIZE<<(FFMAX(retry-1,0)))
@@ -1991,7 +1991,7 @@ static void av_estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset
 
     fill_all_stream_timings(ic);
 
-    url_fseek(ic->pb, old_offset, SEEK_SET);
+    avio_seek(ic->pb, old_offset, SEEK_SET);
     for (i=0; i<ic->nb_streams; i++) {
         st= ic->streams[i];
         st->cur_dts= st->first_dts;
diff --git a/libavformat/vc1testenc.c b/libavformat/vc1testenc.c
index 65889fc55c..65ac6029ac 100644
--- a/libavformat/vc1testenc.c
+++ b/libavformat/vc1testenc.c
@@ -74,7 +74,7 @@ static int vc1test_write_trailer(AVFormatContext *s)
     AVIOContext *pb = s->pb;
 
     if (!url_is_streamed(s->pb)) {
-        url_fseek(pb, 0, SEEK_SET);
+        avio_seek(pb, 0, SEEK_SET);
         avio_wl24(pb, ctx->frames);
         put_flush_packet(pb);
     }
diff --git a/libavformat/vqf.c b/libavformat/vqf.c
index 8a3d170574..dfa1a156d0 100644
--- a/libavformat/vqf.c
+++ b/libavformat/vqf.c
@@ -240,7 +240,7 @@ static int vqf_read_seek(AVFormatContext *s,
     st->cur_dts = av_rescale(pos, st->time_base.den,
                              st->codec->bit_rate * (int64_t)st->time_base.num);
 
-    if ((ret = url_fseek(s->pb, ((pos-7) >> 3) + s->data_offset, SEEK_SET)) < 0)
+    if ((ret = avio_seek(s->pb, ((pos-7) >> 3) + s->data_offset, SEEK_SET)) < 0)
         return ret;
 
     c->remaining_bits = -7 - ((pos-7)&7);
diff --git a/libavformat/wav.c b/libavformat/wav.c
index a574b3b16f..54f9ff7d87 100644
--- a/libavformat/wav.c
+++ b/libavformat/wav.c
@@ -103,9 +103,9 @@ static int wav_write_trailer(AVFormatContext *s)
 
         /* update file size */
         file_size = url_ftell(pb);
-        url_fseek(pb, 4, SEEK_SET);
+        avio_seek(pb, 4, SEEK_SET);
         avio_wl32(pb, (uint32_t)(file_size - 8));
-        url_fseek(pb, file_size, SEEK_SET);
+        avio_seek(pb, file_size, SEEK_SET);
 
         put_flush_packet(pb);
 
@@ -115,9 +115,9 @@ static int wav_write_trailer(AVFormatContext *s)
             number_of_samples = av_rescale(wav->maxpts - wav->minpts + wav->last_duration,
                                            s->streams[0]->codec->sample_rate * (int64_t)s->streams[0]->time_base.num,
                                            s->streams[0]->time_base.den);
-            url_fseek(pb, wav->data-12, SEEK_SET);
+            avio_seek(pb, wav->data-12, SEEK_SET);
             avio_wl32(pb, number_of_samples);
-            url_fseek(pb, file_size, SEEK_SET);
+            avio_seek(pb, file_size, SEEK_SET);
             put_flush_packet(pb);
         }
     }
@@ -160,7 +160,7 @@ static int64_t find_tag(AVIOContext *pb, uint32_t tag1)
         size = next_tag(pb, &tag);
         if (tag == tag1)
             break;
-        url_fseek(pb, size, SEEK_CUR);
+        avio_seek(pb, size, SEEK_CUR);
     }
     return size;
 }
@@ -243,7 +243,7 @@ static int wav_read_header(AVFormatContext *s,
             sample_count = avio_rl32(pb);
             size -= 4;
         }
-        url_fseek(pb, size, SEEK_CUR);
+        avio_seek(pb, size, SEEK_CUR);
     }
     if (rf64)
         size = data_size;
diff --git a/libavformat/wc3movie.c b/libavformat/wc3movie.c
index 478b46f913..a4dd26b442 100644
--- a/libavformat/wc3movie.c
+++ b/libavformat/wc3movie.c
@@ -101,7 +101,7 @@ static int wc3_read_header(AVFormatContext *s,
     wc3->vpkt.data = NULL; wc3->vpkt.size = 0;
 
     /* skip the first 3 32-bit numbers */
-    url_fseek(pb, 12, SEEK_CUR);
+    avio_seek(pb, 12, SEEK_CUR);
 
     /* traverse through the chunks and load the header information before
      * the first BRCH tag */
@@ -114,12 +114,12 @@ static int wc3_read_header(AVFormatContext *s,
         case SOND_TAG:
         case INDX_TAG:
             /* SOND unknown, INDX unnecessary; ignore both */
-            url_fseek(pb, size, SEEK_CUR);
+            avio_seek(pb, size, SEEK_CUR);
             break;
 
         case PC__TAG:
             /* number of palettes, unneeded */
-            url_fseek(pb, 12, SEEK_CUR);
+            avio_seek(pb, 12, SEEK_CUR);
             break;
 
         case BNAM_TAG:
@@ -142,7 +142,7 @@ static int wc3_read_header(AVFormatContext *s,
 
         case PALT_TAG:
             /* one of several palettes */
-            url_fseek(pb, -8, SEEK_CUR);
+            avio_seek(pb, -8, SEEK_CUR);
             av_append_packet(pb, &wc3->vpkt, 8 + PALETTE_SIZE);
             break;
 
@@ -219,13 +219,13 @@ static int wc3_read_packet(AVFormatContext *s,
 
         case SHOT_TAG:
             /* load up new palette */
-            url_fseek(pb, -8, SEEK_CUR);
+            avio_seek(pb, -8, SEEK_CUR);
             av_append_packet(pb, &wc3->vpkt, 8 + 4);
             break;
 
         case VGA__TAG:
             /* send out video chunk */
-            url_fseek(pb, -8, SEEK_CUR);
+            avio_seek(pb, -8, SEEK_CUR);
             ret= av_append_packet(pb, &wc3->vpkt, 8 + size);
             // ignore error if we have some data
             if (wc3->vpkt.size > 0)
@@ -240,7 +240,7 @@ static int wc3_read_packet(AVFormatContext *s,
         case TEXT_TAG:
             /* subtitle chunk */
 #if 0
-            url_fseek(pb, size, SEEK_CUR);
+            avio_seek(pb, size, SEEK_CUR);
 #else
             if ((unsigned)size > sizeof(text) || (ret = avio_read(pb, text, size)) != size)
                 ret = AVERROR(EIO);
diff --git a/libavformat/westwood.c b/libavformat/westwood.c
index b923fef79c..adb35319e2 100644
--- a/libavformat/westwood.c
+++ b/libavformat/westwood.c
@@ -231,7 +231,7 @@ static int wsvqa_read_header(AVFormatContext *s,
     st->codec->codec_tag = 0;  /* no fourcc */
 
     /* skip to the start of the VQA header */
-    url_fseek(pb, 20, SEEK_SET);
+    avio_seek(pb, 20, SEEK_SET);
 
     /* the VQA header needs to go to the decoder */
     st->codec->extradata_size = VQA_HEADER_SIZE;
@@ -303,7 +303,7 @@ static int wsvqa_read_header(AVFormatContext *s,
             break;
         }
 
-        url_fseek(pb, chunk_size, SEEK_CUR);
+        avio_seek(pb, chunk_size, SEEK_CUR);
     } while (chunk_tag != FINF_TAG);
 
     return 0;
@@ -348,7 +348,7 @@ static int wsvqa_read_packet(AVFormatContext *s,
             }
             /* stay on 16-bit alignment */
             if (skip_byte)
-                url_fseek(pb, 1, SEEK_CUR);
+                avio_seek(pb, 1, SEEK_CUR);
 
             return ret;
         } else {
@@ -359,7 +359,7 @@ static int wsvqa_read_packet(AVFormatContext *s,
             default:
                 av_log(s, AV_LOG_INFO, "Skipping unknown chunk 0x%08X\n", chunk_type);
             }
-            url_fseek(pb, chunk_size + skip_byte, SEEK_CUR);
+            avio_seek(pb, chunk_size + skip_byte, SEEK_CUR);
         }
     }
 
diff --git a/libavformat/wtv.c b/libavformat/wtv.c
index 0ed06aaa58..6c9993b15b 100644
--- a/libavformat/wtv.c
+++ b/libavformat/wtv.c
@@ -98,7 +98,7 @@ static int wtvfile_read_packet(void *opaque, uint8_t *buf, int buf_size)
             int i = wf->position >> wf->sector_bits;
             if (i >= wf->nb_sectors ||
                 (wf->sectors[i] != wf->sectors[i - 1] + (1 << (wf->sector_bits - WTV_SECTOR_BITS)) &&
-                url_fseek(pb, (int64_t)wf->sectors[i] << WTV_SECTOR_BITS, SEEK_SET) < 0)) {
+                avio_seek(pb, (int64_t)wf->sectors[i] << WTV_SECTOR_BITS, SEEK_SET) < 0)) {
                 wf->error = 1;
                 break;
             }
@@ -123,7 +123,7 @@ static int64_t wtvfile_seek(void *opaque, int64_t offset, int whence)
         offset = wf->length;
 
     wf->error = offset < 0 || offset >= wf->length ||
-                url_fseek(pb, ((int64_t)wf->sectors[offset >> wf->sector_bits] << WTV_SECTOR_BITS)
+                avio_seek(pb, ((int64_t)wf->sectors[offset >> wf->sector_bits] << WTV_SECTOR_BITS)
                               + (offset & ((1 << wf->sector_bits) - 1)), SEEK_SET) < 0;
     wf->position = offset;
     return offset;
@@ -159,7 +159,7 @@ static AVIOContext * wtvfile_open_sector(int first_sector, uint64_t length, int
     WtvFile *wf;
     uint8_t *buffer;
 
-    if (url_fseek(s->pb, first_sector << WTV_SECTOR_BITS, SEEK_SET) < 0)
+    if (avio_seek(s->pb, first_sector << WTV_SECTOR_BITS, SEEK_SET) < 0)
         return NULL;
 
     wf = av_mallocz(sizeof(WtvFile));
@@ -195,7 +195,7 @@ static AVIOContext * wtvfile_open_sector(int first_sector, uint64_t length, int
         }
         wf->nb_sectors = 0;
         for (i = 0; i < nb_sectors1; i++) {
-            if (url_fseek(s->pb, (int64_t)sectors1[i] << WTV_SECTOR_BITS, SEEK_SET) < 0)
+            if (avio_seek(s->pb, (int64_t)sectors1[i] << WTV_SECTOR_BITS, SEEK_SET) < 0)
                 break;
             wf->nb_sectors += read_ints(s->pb, wf->sectors + i * WTV_SECTOR_SIZE / 4, WTV_SECTOR_SIZE / 4);
         }
@@ -222,7 +222,7 @@ static AVIOContext * wtvfile_open_sector(int first_sector, uint64_t length, int
 
     /* seek to intial sector */
     wf->position = 0;
-    if (url_fseek(s->pb, (int64_t)wf->sectors[0] << WTV_SECTOR_BITS, SEEK_SET) < 0) {
+    if (avio_seek(s->pb, (int64_t)wf->sectors[0] << WTV_SECTOR_BITS, SEEK_SET) < 0) {
         av_free(wf->sectors);
         av_free(wf);
         return NULL;
@@ -492,7 +492,7 @@ static void get_attachment(AVFormatContext *s, AVIOContext *pb, int length)
     st->codec->extradata_size = filesize;
     avio_read(pb, st->codec->extradata, filesize);
 done:
-    url_fseek(pb, pos + length, SEEK_SET);
+    avio_seek(pb, pos + length, SEEK_SET);
 }
 
 static void get_tag(AVFormatContext *s, AVIOContext *pb, const char *key, int type, int length)
@@ -665,7 +665,7 @@ static AVStream * parse_media_type(AVFormatContext *s, AVStream *st, int sid,
         url_fskip(pb, size - 32);
         ff_get_guid(pb, &actual_subtype);
         ff_get_guid(pb, &actual_formattype);
-        url_fseek(pb, -size, SEEK_CUR);
+        avio_seek(pb, -size, SEEK_CUR);
 
         st = parse_media_type(s, st, sid, mediatype, actual_subtype, actual_formattype, size - 32);
         url_fskip(pb, 32);
@@ -963,7 +963,7 @@ static int read_header(AVFormatContext *s, AVFormatParameters *ap)
     url_fskip(s->pb, 4);
     root_sector = avio_rl32(s->pb);
 
-    url_fseek(s->pb, root_sector << WTV_SECTOR_BITS, SEEK_SET);
+    avio_seek(s->pb, root_sector << WTV_SECTOR_BITS, SEEK_SET);
     root_size = avio_read(s->pb, root, root_size);
     if (root_size < 0)
         return AVERROR_INVALIDDATA;
@@ -978,7 +978,7 @@ static int read_header(AVFormatContext *s, AVFormatParameters *ap)
     ret = parse_chunks(s, SEEK_TO_DATA, 0, 0);
     if (ret < 0)
         return ret;
-    url_fseek(wtv->pb, -32, SEEK_CUR);
+    avio_seek(wtv->pb, -32, SEEK_CUR);
 
     timeline_pos = url_ftell(s->pb); // save before opening another file
 
@@ -1028,7 +1028,7 @@ static int read_header(AVFormatContext *s, AVFormatParameters *ap)
         }
     }
 
-    url_fseek(s->pb, timeline_pos, SEEK_SET);
+    avio_seek(s->pb, timeline_pos, SEEK_SET);
     return 0;
 }
 
@@ -1072,9 +1072,9 @@ static int read_seek(AVFormatContext *s, int stream_index,
     i = ff_index_search_timestamp(wtv->index_entries, wtv->nb_index_entries, ts_relative, flags);
     if (i < 0) {
         if (wtv->last_valid_pts == AV_NOPTS_VALUE || ts < wtv->last_valid_pts)
-            url_fseek(pb, 0, SEEK_SET);
+            avio_seek(pb, 0, SEEK_SET);
         else if (st->duration != AV_NOPTS_VALUE && ts_relative > st->duration && wtv->nb_index_entries)
-            url_fseek(pb, wtv->index_entries[wtv->nb_index_entries - 1].pos, SEEK_SET);
+            avio_seek(pb, wtv->index_entries[wtv->nb_index_entries - 1].pos, SEEK_SET);
         if (parse_chunks(s, SEEK_TO_PTS, ts, 0) < 0)
             return AVERROR(ERANGE);
         return 0;
@@ -1083,7 +1083,7 @@ static int read_seek(AVFormatContext *s, int stream_index,
     if (wtv->epoch != AV_NOPTS_VALUE)
         wtv->pts += wtv->epoch;
     wtv->last_valid_pts = wtv->pts;
-    url_fseek(pb, wtv->index_entries[i].pos, SEEK_SET);
+    avio_seek(pb, wtv->index_entries[i].pos, SEEK_SET);
     return 0;
 }
 
diff --git a/libavformat/wv.c b/libavformat/wv.c
index fca35b818b..c2ef8d6356 100644
--- a/libavformat/wv.c
+++ b/libavformat/wv.c
@@ -175,7 +175,7 @@ static int wv_read_block_header(AVFormatContext *ctx, AVIOContext *pb, int appen
             av_log(ctx, AV_LOG_ERROR, "Cannot determine custom sampling rate\n");
             return -1;
         }
-        url_fseek(pb, block_end - wc->blksize + 24, SEEK_SET);
+        avio_seek(pb, block_end - wc->blksize + 24, SEEK_SET);
     }
     if(!wc->bpp) wc->bpp = bpp;
     if(!wc->chan) wc->chan = chan;
@@ -228,7 +228,7 @@ static int wv_read_header(AVFormatContext *s,
         ff_ape_parse_tag(s);
         if(!av_metadata_get(s->metadata, "", NULL, AV_METADATA_IGNORE_SUFFIX))
             ff_id3v1_read(s);
-        url_fseek(s->pb, cur, SEEK_SET);
+        avio_seek(s->pb, cur, SEEK_SET);
     }
 
     return 0;
@@ -320,7 +320,7 @@ static int wv_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp,
     /* if found, seek there */
     if (index >= 0){
         wc->block_parsed = 1;
-        url_fseek(s->pb, st->index_entries[index].pos, SEEK_SET);
+        avio_seek(s->pb, st->index_entries[index].pos, SEEK_SET);
         return 0;
     }
     /* if timestamp is out of bounds, return error */
@@ -331,7 +331,7 @@ static int wv_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp,
     do{
         ret = av_read_frame(s, pkt);
         if (ret < 0){
-            url_fseek(s->pb, pos, SEEK_SET);
+            avio_seek(s->pb, pos, SEEK_SET);
             return -1;
         }
         pts = pkt->pts;
diff --git a/libavformat/yop.c b/libavformat/yop.c
index 2e58cc660a..0c87724c53 100644
--- a/libavformat/yop.c
+++ b/libavformat/yop.c
@@ -104,7 +104,7 @@ static int yop_read_header(AVFormatContext *s, AVFormatParameters *ap)
         return AVERROR_INVALIDDATA;
     }
 
-    url_fseek(pb, 2048, SEEK_SET);
+    avio_seek(pb, 2048, SEEK_SET);
 
     av_set_pts_info(video_stream, 32, 1, frame_rate);
 
@@ -198,7 +198,7 @@ static int yop_read_seek(AVFormatContext *s, int stream_index,
     frame_pos      = timestamp * yop->frame_size + pos_min;
     yop->odd_frame = timestamp & 1;
 
-    url_fseek(s->pb, frame_pos, SEEK_SET);
+    avio_seek(s->pb, frame_pos, SEEK_SET);
     return 0;
 }