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authorAnton Khirnov <anton@khirnov.net>2012-02-05 14:32:10 +0100
committerAnton Khirnov <anton@khirnov.net>2012-02-07 20:11:11 +0100
commit1270e12e49c9039fa5fe18cfb45137558d127f92 (patch)
tree2ff84e541b91ef8c10db23273ff809115303e0fc
parentc9af8326238c37d1a1f0029a158c7ede33836aa3 (diff)
downloadffmpeg-1270e12e49c9039fa5fe18cfb45137558d127f92.tar.gz
avconv: rework -t handling for encoding.
Current code compares the desired recording time with InputStream.pts, which has a very unclear meaning. Change the code to use actual timestamps of the frames passed to the encoder. In several tests, one less frame is encoded, which is more correct. In the idroq test one more frame is encoded, which is again more correct. Behavior with stream copy should be unchanged.
-rw-r--r--avconv.c47
-rw-r--r--tests/ref/fate/idroq-video-encode2
-rw-r--r--tests/ref/fate/real-rv401
-rw-r--r--tests/ref/lavf/asf4
-rw-r--r--tests/ref/lavf/avi6
-rw-r--r--tests/ref/lavf/ffm4
-rw-r--r--tests/ref/lavf/mkv6
-rw-r--r--tests/ref/lavf/mpg4
-rw-r--r--tests/ref/lavf/nut6
-rw-r--r--tests/ref/lavf/ogg6
-rw-r--r--tests/ref/lavf/rm4
-rw-r--r--tests/ref/lavf/ts6
-rw-r--r--tests/ref/seek/lavf_avi6
-rw-r--r--tests/ref/seek/lavf_mkv6
-rw-r--r--tests/ref/seek/lavf_mpg6
-rw-r--r--tests/ref/seek/lavf_rm18
16 files changed, 82 insertions, 50 deletions
diff --git a/avconv.c b/avconv.c
index 876ad1996c..30782e1826 100644
--- a/avconv.c
+++ b/avconv.c
@@ -204,6 +204,9 @@ typedef struct OutputStream {
// double sync_ipts; /* dts from the AVPacket of the demuxer in second units */
struct InputStream *sync_ist; /* input stream to sync against */
int64_t sync_opts; /* output frame counter, could be changed to some true timestamp */ // FIXME look at frame_number
+ /* pts of the first frame encoded for this stream, used for limiting
+ * recording time */
+ int64_t first_pts;
AVBitStreamFilterContext *bitstream_filters;
AVCodec *enc;
int64_t max_frames;
@@ -918,6 +921,19 @@ static void write_frame(AVFormatContext *s, AVPacket *pkt, OutputStream *ost)
}
}
+static int check_recording_time(OutputStream *ost)
+{
+ OutputFile *of = &output_files[ost->file_index];
+
+ if (of->recording_time != INT64_MAX &&
+ av_compare_ts(ost->sync_opts - ost->first_pts, ost->st->codec->time_base, of->recording_time,
+ AV_TIME_BASE_Q) >= 0) {
+ ost->is_past_recording_time = 1;
+ return 0;
+ }
+ return 1;
+}
+
static void generate_silence(uint8_t* buf, enum AVSampleFormat sample_fmt, size_t size)
{
int fill_char = 0x00;
@@ -958,6 +974,11 @@ static int encode_audio_frame(AVFormatContext *s, OutputStream *ost,
av_log(NULL, AV_LOG_FATAL, "Audio encoding failed\n");
exit_program(1);
}
+
+ if (!check_recording_time(ost))
+ return 0;
+
+ ost->sync_opts += frame->nb_samples;
}
got_packet = 0;
@@ -977,9 +998,6 @@ static int encode_audio_frame(AVFormatContext *s, OutputStream *ost,
audio_size += pkt.size;
}
- if (frame)
- ost->sync_opts += frame->nb_samples;
-
return pkt.size;
}
@@ -1241,6 +1259,10 @@ static void do_subtitle_out(AVFormatContext *s,
nb = 1;
for (i = 0; i < nb; i++) {
+ ost->sync_opts = av_rescale_q(pts, ist->st->time_base, enc->time_base);
+ if (!check_recording_time(ost))
+ return;
+
sub->pts = av_rescale_q(pts, ist->st->time_base, AV_TIME_BASE_Q);
// start_display_time is required to be 0
sub->pts += av_rescale_q(sub->start_display_time, (AVRational){ 1, 1000 }, AV_TIME_BASE_Q);
@@ -1382,11 +1404,17 @@ static void do_video_out(AVFormatContext *s,
final_picture = in_picture;
#endif
+ if (!ost->frame_number)
+ ost->first_pts = ost->sync_opts;
+
/* duplicates frame if needed */
for (i = 0; i < nb_frames; i++) {
AVPacket pkt;
av_init_packet(&pkt);
+ if (!check_recording_time(ost))
+ return;
+
if (s->oformat->flags & AVFMT_RAWPICTURE &&
enc->codec->id == CODEC_ID_RAWVIDEO) {
/* raw pictures are written as AVPicture structure to
@@ -1723,13 +1751,6 @@ static int check_output_constraints(InputStream *ist, OutputStream *ost)
if (of->start_time && ist->pts < of->start_time)
return 0;
- if (of->recording_time != INT64_MAX &&
- av_compare_ts(ist->pts, AV_TIME_BASE_Q, of->recording_time + of->start_time,
- (AVRational){ 1, 1000000 }) >= 0) {
- ost->is_past_recording_time = 1;
- return 0;
- }
-
return 1;
}
@@ -1745,6 +1766,12 @@ static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *p
!ost->copy_initial_nonkeyframes)
return;
+ if (of->recording_time != INT64_MAX &&
+ ist->pts >= of->recording_time + of->start_time) {
+ ost->is_past_recording_time = 1;
+ return;
+ }
+
/* force the input stream PTS */
if (ost->st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
audio_size += pkt->size;
diff --git a/tests/ref/fate/idroq-video-encode b/tests/ref/fate/idroq-video-encode
index 4c89de8b63..f243a0d43b 100644
--- a/tests/ref/fate/idroq-video-encode
+++ b/tests/ref/fate/idroq-video-encode
@@ -1 +1 @@
-75df9ce475c1b185fc3dbc219596edd3
+72e5b060ff0ab8855da22f33a6e04bff
diff --git a/tests/ref/fate/real-rv40 b/tests/ref/fate/real-rv40
index 6159859cad..8307817021 100644
--- a/tests/ref/fate/real-rv40
+++ b/tests/ref/fate/real-rv40
@@ -238,4 +238,3 @@
0, 236, 236, 1, 276480, 0x8f316c66
0, 237, 237, 1, 276480, 0x6348ecf5
0, 238, 238, 1, 276480, 0x34b5b78a
-0, 239, 239, 1, 276480, 0xcbf66922
diff --git a/tests/ref/lavf/asf b/tests/ref/lavf/asf
index 533a3c3591..2d4788aee8 100644
--- a/tests/ref/lavf/asf
+++ b/tests/ref/lavf/asf
@@ -1,3 +1,3 @@
-c544bb40c2f4c09d44318db5228ee499 *./tests/data/lavf/lavf.asf
+98ffddfa94926558ecf20cc6f47236a6 *./tests/data/lavf/lavf.asf
333375 ./tests/data/lavf/lavf.asf
-./tests/data/lavf/lavf.asf CRC=0x9f5ab3e6
+./tests/data/lavf/lavf.asf CRC=0x51485213
diff --git a/tests/ref/lavf/avi b/tests/ref/lavf/avi
index cf47755ab7..ae85efc50b 100644
--- a/tests/ref/lavf/avi
+++ b/tests/ref/lavf/avi
@@ -1,3 +1,3 @@
-7e5e4db8c04f0acd16cff6b30e60d0e5 *./tests/data/lavf/lavf.avi
-331032 ./tests/data/lavf/lavf.avi
-./tests/data/lavf/lavf.avi CRC=0x2a83e6b0
+e056e1164236b22fafc8325de8221a58 *./tests/data/lavf/lavf.avi
+330798 ./tests/data/lavf/lavf.avi
+./tests/data/lavf/lavf.avi CRC=0xa79b84dd
diff --git a/tests/ref/lavf/ffm b/tests/ref/lavf/ffm
index 73e94ddfd6..0ae40f59d9 100644
--- a/tests/ref/lavf/ffm
+++ b/tests/ref/lavf/ffm
@@ -1,3 +1,3 @@
-4ef091d638bb20b8eaef5b3a0d6f97b7 *./tests/data/lavf/lavf.ffm
+c963591a7f9a08d48e0f988640795690 *./tests/data/lavf/lavf.ffm
376832 ./tests/data/lavf/lavf.ffm
-./tests/data/lavf/lavf.ffm CRC=0xf361ed74
+./tests/data/lavf/lavf.ffm CRC=0x88f58ba1
diff --git a/tests/ref/lavf/mkv b/tests/ref/lavf/mkv
index 05eb67dd1c..8185d15a61 100644
--- a/tests/ref/lavf/mkv
+++ b/tests/ref/lavf/mkv
@@ -1,3 +1,3 @@
-a36c2d9378b9870880556ced1cb89ecf *./tests/data/lavf/lavf.mkv
- 320478 ./tests/data/lavf/lavf.mkv
-./tests/data/lavf/lavf.mkv CRC=0x2a83e6b0
+ed1f083a7d2169c51e5894dabed061df *./tests/data/lavf/lavf.mkv
+320262 ./tests/data/lavf/lavf.mkv
+./tests/data/lavf/lavf.mkv CRC=0xa79b84dd
diff --git a/tests/ref/lavf/mpg b/tests/ref/lavf/mpg
index b81cb8a8de..1b63d753fb 100644
--- a/tests/ref/lavf/mpg
+++ b/tests/ref/lavf/mpg
@@ -1,3 +1,3 @@
-dd60652c2193670abffb8c2a123a820e *./tests/data/lavf/lavf.mpg
+f0b995c0c10b08133f5138069c3e9786 *./tests/data/lavf/lavf.mpg
372736 ./tests/data/lavf/lavf.mpg
-./tests/data/lavf/lavf.mpg CRC=0xf361ed74
+./tests/data/lavf/lavf.mpg CRC=0x88f58ba1
diff --git a/tests/ref/lavf/nut b/tests/ref/lavf/nut
index 461b18587c..e658434849 100644
--- a/tests/ref/lavf/nut
+++ b/tests/ref/lavf/nut
@@ -1,3 +1,3 @@
-16b9d2cf8effb7dae316c6b9248a49b7 *./tests/data/lavf/lavf.nut
-319888 ./tests/data/lavf/lavf.nut
-./tests/data/lavf/lavf.nut CRC=0x2a83e6b0
+7e44a8ed5ff2fe5442f758d48fe1b496 *./tests/data/lavf/lavf.nut
+319680 ./tests/data/lavf/lavf.nut
+./tests/data/lavf/lavf.nut CRC=0xa79b84dd
diff --git a/tests/ref/lavf/ogg b/tests/ref/lavf/ogg
index b90bb70276..7bc66a3657 100644
--- a/tests/ref/lavf/ogg
+++ b/tests/ref/lavf/ogg
@@ -1,3 +1,3 @@
-b55661ae1a65f99af249d8efc7619a03 *./tests/data/lavf/lavf.ogg
-13819 ./tests/data/lavf/lavf.ogg
-./tests/data/lavf/lavf.ogg CRC=0xf1ae5536
+37147a98d9a484208389efa6a1f8796f *./tests/data/lavf/lavf.ogg
+13966 ./tests/data/lavf/lavf.ogg
+./tests/data/lavf/lavf.ogg CRC=0x37a143ea
diff --git a/tests/ref/lavf/rm b/tests/ref/lavf/rm
index eae422ae4d..27054969c6 100644
--- a/tests/ref/lavf/rm
+++ b/tests/ref/lavf/rm
@@ -1,2 +1,2 @@
-2e3d6b1944c6cd2cf14e13055aecf82a *./tests/data/lavf/lavf.rm
-346706 ./tests/data/lavf/lavf.rm
+f3ce1f1850655ae43f6184ae436acb70 *./tests/data/lavf/lavf.rm
+346414 ./tests/data/lavf/lavf.rm
diff --git a/tests/ref/lavf/ts b/tests/ref/lavf/ts
index ebe6a77566..94937669e1 100644
--- a/tests/ref/lavf/ts
+++ b/tests/ref/lavf/ts
@@ -1,3 +1,3 @@
-293142d7286db15e5f4d7d1ca0d9c97c *./tests/data/lavf/lavf.ts
-406644 ./tests/data/lavf/lavf.ts
-./tests/data/lavf/lavf.ts CRC=0x133216c1
+9b59f71822c6dde18fb38b084c150285 *./tests/data/lavf/lavf.ts
+406456 ./tests/data/lavf/lavf.ts
+./tests/data/lavf/lavf.ts CRC=0x64fab4df
diff --git a/tests/ref/seek/lavf_avi b/tests/ref/seek/lavf_avi
index 964f0b8b6f..2e09ad10cc 100644
--- a/tests/ref/seek/lavf_avi
+++ b/tests/ref/seek/lavf_avi
@@ -8,7 +8,7 @@ ret: 0 st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos: 301466 size: 27864
ret:-1 st: 0 flags:1 ts:-0.320000
ret:-1 st: 1 flags:0 ts: 2.586122
ret: 0 st: 1 flags:1 ts: 1.462857
-ret: 0 st: 1 flags:1 dts: 1.018776 pts: 1.018776 pos: 329774 size: 209
+ret: 0 st: 1 flags:1 dts: 0.992653 pts: 0.992653 pos: 329556 size: 209
ret: 0 st:-1 flags:0 ts: 0.365002
ret: 0 st: 0 flags:1 dts: 0.480000 pts: 0.480000 pos: 156166 size: 27955
ret:-1 st:-1 flags:1 ts:-0.740831
@@ -18,7 +18,7 @@ ret: 0 st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos: 301466 size: 27864
ret: 0 st: 1 flags:0 ts:-0.052245
ret: 0 st: 1 flags:1 dts: 0.000000 pts: 0.000000 pos: 37784 size: 208
ret: 0 st: 1 flags:1 ts: 2.847347
-ret: 0 st: 1 flags:1 dts: 1.018776 pts: 1.018776 pos: 329774 size: 209
+ret: 0 st: 1 flags:1 dts: 0.992653 pts: 0.992653 pos: 329556 size: 209
ret:-1 st:-1 flags:0 ts: 1.730004
ret: 0 st:-1 flags:1 ts: 0.624171
ret: 0 st: 0 flags:1 dts: 0.480000 pts: 0.480000 pos: 156166 size: 27955
@@ -38,7 +38,7 @@ ret: 0 st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos: 301466 size: 27864
ret:-1 st: 0 flags:1 ts:-0.240000
ret:-1 st: 1 flags:0 ts: 2.664490
ret: 0 st: 1 flags:1 ts: 1.567347
-ret: 0 st: 1 flags:1 dts: 1.018776 pts: 1.018776 pos: 329774 size: 209
+ret: 0 st: 1 flags:1 dts: 0.992653 pts: 0.992653 pos: 329556 size: 209
ret: 0 st:-1 flags:0 ts: 0.460008
ret: 0 st: 0 flags:1 dts: 0.480000 pts: 0.480000 pos: 156166 size: 27955
ret:-1 st:-1 flags:1 ts:-0.645825
diff --git a/tests/ref/seek/lavf_mkv b/tests/ref/seek/lavf_mkv
index 9f447b3257..f2590211df 100644
--- a/tests/ref/seek/lavf_mkv
+++ b/tests/ref/seek/lavf_mkv
@@ -10,7 +10,7 @@ ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 513 size: 27837
ret: 0 st: 1 flags:0 ts: 2.577000
ret:-EOF
ret: 0 st: 1 flags:1 ts: 1.471000
-ret: 0 st: 1 flags:1 dts: 1.019000 pts: 1.019000 pos: 320207 size: 209
+ret: 0 st: 1 flags:1 dts: 0.993000 pts: 0.993000 pos: 319991 size: 209
ret: 0 st:-1 flags:0 ts: 0.365002
ret: 0 st: 0 flags:1 dts: 0.480000 pts: 0.480000 pos: 146703 size: 27925
ret: 0 st:-1 flags:1 ts:-0.740831
@@ -22,7 +22,7 @@ ret: 0 st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos: 291934 size: 27834
ret: 0 st: 1 flags:0 ts:-0.058000
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 513 size: 27837
ret: 0 st: 1 flags:1 ts: 2.836000
-ret: 0 st: 1 flags:1 dts: 1.019000 pts: 1.019000 pos: 320207 size: 209
+ret: 0 st: 1 flags:1 dts: 0.993000 pts: 0.993000 pos: 319991 size: 209
ret: 0 st:-1 flags:0 ts: 1.730004
ret:-EOF
ret: 0 st:-1 flags:1 ts: 0.624171
@@ -46,7 +46,7 @@ ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 513 size: 27837
ret: 0 st: 1 flags:0 ts: 2.672000
ret:-EOF
ret: 0 st: 1 flags:1 ts: 1.566000
-ret: 0 st: 1 flags:1 dts: 1.019000 pts: 1.019000 pos: 320207 size: 209
+ret: 0 st: 1 flags:1 dts: 0.993000 pts: 0.993000 pos: 319991 size: 209
ret: 0 st:-1 flags:0 ts: 0.460008
ret: 0 st: 0 flags:1 dts: 0.480000 pts: 0.480000 pos: 146703 size: 27925
ret: 0 st:-1 flags:1 ts:-0.645825
diff --git a/tests/ref/seek/lavf_mpg b/tests/ref/seek/lavf_mpg
index dc51195293..aad61dcae2 100644
--- a/tests/ref/seek/lavf_mpg
+++ b/tests/ref/seek/lavf_mpg
@@ -8,7 +8,7 @@ ret: 0 st: 1 flags:1 dts: 1.000000 pts: 1.000000 pos: 2048 size: 208
ret: 0 st: 0 flags:1 ts:-0.317500
ret: 0 st: 1 flags:1 dts: 1.000000 pts: 1.000000 pos: 2048 size: 208
ret: 0 st: 1 flags:0 ts: 2.576667
-ret: 0 st: 1 flags:1 dts: 2.018778 pts: 2.018778 pos: 370700 size: 235
+ret: 0 st: 1 flags:1 dts: 1.783678 pts: 1.783678 pos: 368652 size: 379
ret: 0 st: 1 flags:1 ts: 1.470833
ret: 0 st: 1 flags:1 dts: 1.261222 pts: 1.261222 pos: 145408 size: 261
ret: 0 st:-1 flags:0 ts: 0.365002
@@ -22,7 +22,7 @@ ret: 0 st: 0 flags:0 dts: 1.040000 pts: 1.080000 pos: 40960 size: 16073
ret: 0 st: 1 flags:0 ts:-0.058333
ret: 0 st: 1 flags:1 dts: 1.000000 pts: 1.000000 pos: 2048 size: 208
ret: 0 st: 1 flags:1 ts: 2.835833
-ret: 0 st: 1 flags:1 dts: 2.018778 pts: 2.018778 pos: 370700 size: 235
+ret: 0 st: 1 flags:1 dts: 1.783678 pts: 1.783678 pos: 368652 size: 379
ret: 0 st:-1 flags:0 ts: 1.730004
ret: 0 st: 0 flags:0 dts: 1.760000 pts: 1.800000 pos: 292864 size: 13170
ret: 0 st:-1 flags:1 ts: 0.624171
@@ -44,7 +44,7 @@ ret: 0 st: 1 flags:1 dts: 1.000000 pts: 1.000000 pos: 2048 size: 208
ret: 0 st: 0 flags:1 ts:-0.222489
ret: 0 st: 1 flags:1 dts: 1.000000 pts: 1.000000 pos: 2048 size: 208
ret: 0 st: 1 flags:0 ts: 2.671678
-ret: 0 st: 1 flags:1 dts: 2.018778 pts: 2.018778 pos: 370700 size: 235
+ret: 0 st: 1 flags:1 dts: 1.783678 pts: 1.783678 pos: 368652 size: 379
ret: 0 st: 1 flags:1 ts: 1.565844
ret: 0 st: 1 flags:1 dts: 1.522444 pts: 1.522444 pos: 342028 size: 314
ret: 0 st:-1 flags:0 ts: 0.460008
diff --git a/tests/ref/seek/lavf_rm b/tests/ref/seek/lavf_rm
index 188367bc90..394928086b 100644
--- a/tests/ref/seek/lavf_rm
+++ b/tests/ref/seek/lavf_rm
@@ -7,8 +7,10 @@ ret: 0 st: 0 flags:0 ts: 0.788000
ret: 0 st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos: 314982 size: 31143
ret: 0 st: 0 flags:1 ts:-0.317000
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 398 size: 31082
-ret:-1 st: 1 flags:0 ts: 2.577000
-ret:-1 st: 1 flags:1 ts: 1.471000
+ret: 0 st: 1 flags:0 ts: 2.577000
+ret: 0 st: 1 flags:1 dts: 0.975000 pts: 0.975000 pos: 346128 size: 278
+ret: 0 st: 1 flags:1 ts: 1.471000
+ret: 0 st: 1 flags:1 dts: 0.975000 pts: 0.975000 pos: 346128 size: 278
ret: 0 st:-1 flags:0 ts: 0.365002
ret: 0 st: 0 flags:1 dts: 0.480000 pts: 0.480000 pos: 158515 size: 31134
ret: 0 st:-1 flags:1 ts:-0.740831
@@ -19,7 +21,8 @@ ret: 0 st: 0 flags:1 ts: 1.048000
ret: 0 st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos: 314982 size: 31143
ret: 0 st: 1 flags:0 ts:-0.058000
ret: 0 st: 1 flags:1 dts: 0.000000 pts: 0.000000 pos: 31483 size: 278
-ret:-1 st: 1 flags:1 ts: 2.836000
+ret: 0 st: 1 flags:1 ts: 2.836000
+ret: 0 st: 1 flags:1 dts: 0.975000 pts: 0.975000 pos: 346128 size: 278
ret: 0 st:-1 flags:0 ts: 1.730004
ret: 0 st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos: 314982 size: 31143
ret: 0 st:-1 flags:1 ts: 0.624171
@@ -28,7 +31,8 @@ ret: 0 st: 0 flags:0 ts:-0.482000
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 398 size: 31082
ret: 0 st: 0 flags:1 ts: 2.413000
ret: 0 st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos: 314982 size: 31143
-ret:-1 st: 1 flags:0 ts: 1.307000
+ret: 0 st: 1 flags:0 ts: 1.307000
+ret: 0 st: 1 flags:1 dts: 0.975000 pts: 0.975000 pos: 346128 size: 278
ret: 0 st: 1 flags:1 ts: 0.201000
ret: 0 st: 1 flags:1 dts: 0.174000 pts: 0.174000 pos: 78969 size: 278
ret: 0 st:-1 flags:0 ts:-0.904994
@@ -39,8 +43,10 @@ ret: 0 st: 0 flags:0 ts: 0.883000
ret: 0 st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos: 314982 size: 31143
ret: 0 st: 0 flags:1 ts:-0.222000
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 398 size: 31082
-ret:-1 st: 1 flags:0 ts: 2.672000
-ret:-1 st: 1 flags:1 ts: 1.566000
+ret: 0 st: 1 flags:0 ts: 2.672000
+ret: 0 st: 1 flags:1 dts: 0.975000 pts: 0.975000 pos: 346128 size: 278
+ret: 0 st: 1 flags:1 ts: 1.566000
+ret: 0 st: 1 flags:1 dts: 0.975000 pts: 0.975000 pos: 346128 size: 278
ret: 0 st:-1 flags:0 ts: 0.460008
ret: 0 st: 0 flags:1 dts: 0.480000 pts: 0.480000 pos: 158515 size: 31134
ret: 0 st:-1 flags:1 ts:-0.645825