/* * Copyright (c) 2012 Martin Storsjo * * This file is part of Libav. * * Libav is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * Libav is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /* * To create a simple file for smooth streaming: * avconv <normal input/transcoding options> -movflags frag_keyframe foo.ismv * ismindex -n foo foo.ismv * This step creates foo.ism and foo.ismc that is required by IIS for * serving it. * * With -ismf, it also creates foo.ismf, which maps fragment names to * start-end offsets in the ismv, for use in your own streaming server. * * By adding -path-prefix path/, the produced foo.ism will refer to the * files foo.ismv as "path/foo.ismv" - the prefix for the generated ismc * file can be set with the -ismc-prefix option similarly. * * To pre-split files for serving as static files by a web server without * any extra server support, create the ismv file as above, and split it: * ismindex -split foo.ismv * This step creates a file Manifest and directories QualityLevel(...), * that can be read directly by a smooth streaming player. * * The -output dir option can be used to request that output files * (both .ism/.ismc, or Manifest/QualityLevels* when splitting) * should be written to this directory instead of in the current directory. * (The directory itself isn't created if it doesn't already exist.) */ #include <stdio.h> #include <string.h> #include "libavformat/avformat.h" #include "libavformat/isom.h" #include "libavformat/os_support.h" #include "libavutil/intreadwrite.h" #include "libavutil/mathematics.h" static int usage(const char *argv0, int ret) { fprintf(stderr, "%s [-split] [-ismf] [-n basename] [-path-prefix prefix] " "[-ismc-prefix prefix] [-output dir] file1 [file2] ...\n", argv0); return ret; } struct MoofOffset { int64_t time; int64_t offset; int64_t duration; }; struct Track { const char *name; int64_t duration; int bitrate; int track_id; int is_audio, is_video; int width, height; int chunks; int sample_rate, channels; uint8_t *codec_private; int codec_private_size; struct MoofOffset *offsets; int timescale; const char *fourcc; int blocksize; int tag; }; struct Tracks { int nb_tracks; int64_t duration; struct Track **tracks; int video_track, audio_track; int nb_video_tracks, nb_audio_tracks; }; static int expect_tag(int32_t got_tag, int32_t expected_tag) { if (got_tag != expected_tag) { char got_tag_str[4], expected_tag_str[4]; AV_WB32(got_tag_str, got_tag); AV_WB32(expected_tag_str, expected_tag); fprintf(stderr, "wanted tag %.4s, got %.4s\n", expected_tag_str, got_tag_str); return -1; } return 0; } static int copy_tag(AVIOContext *in, AVIOContext *out, int32_t tag_name) { int32_t size, tag; size = avio_rb32(in); tag = avio_rb32(in); avio_wb32(out, size); avio_wb32(out, tag); if (expect_tag(tag, tag_name) != 0) return -1; size -= 8; while (size > 0) { char buf[1024]; int len = FFMIN(sizeof(buf), size); int got; if ((got = avio_read(in, buf, len)) != len) { fprintf(stderr, "short read, wanted %d, got %d\n", len, got); break; } avio_write(out, buf, len); size -= len; } return 0; } static int skip_tag(AVIOContext *in, int32_t tag_name) { int64_t pos = avio_tell(in); int32_t size, tag; size = avio_rb32(in); tag = avio_rb32(in); if (expect_tag(tag, tag_name) != 0) return -1; avio_seek(in, pos + size, SEEK_SET); return 0; } static int write_fragment(const char *filename, AVIOContext *in) { AVIOContext *out = NULL; int ret; if ((ret = avio_open2(&out, filename, AVIO_FLAG_WRITE, NULL, NULL)) < 0) { char errbuf[100]; av_strerror(ret, errbuf, sizeof(errbuf)); fprintf(stderr, "Unable to open %s: %s\n", filename, errbuf); return ret; } ret = copy_tag(in, out, MKBETAG('m', 'o', 'o', 'f')); if (!ret) ret = copy_tag(in, out, MKBETAG('m', 'd', 'a', 't')); avio_flush(out); avio_close(out); return ret; } static int skip_fragment(AVIOContext *in) { int ret; ret = skip_tag(in, MKBETAG('m', 'o', 'o', 'f')); if (!ret) ret = skip_tag(in, MKBETAG('m', 'd', 'a', 't')); return ret; } static int write_fragments(struct Tracks *tracks, int start_index, AVIOContext *in, const char *basename, int split, int ismf, const char* output_prefix) { char dirname[2048], filename[2048], idxname[2048]; int i, j, ret = 0, fragment_ret; FILE* out = NULL; if (ismf) { snprintf(idxname, sizeof(idxname), "%s%s.ismf", output_prefix, basename); out = fopen(idxname, "w"); if (!out) { ret = AVERROR(errno); perror(idxname); goto fail; } } for (i = start_index; i < tracks->nb_tracks; i++) { struct Track *track = tracks->tracks[i]; const char *type = track->is_video ? "video" : "audio"; snprintf(dirname, sizeof(dirname), "%sQualityLevels(%d)", output_prefix, track->bitrate); if (split) { if (mkdir(dirname, 0777) == -1 && errno != EEXIST) { ret = AVERROR(errno); perror(dirname); goto fail; } } for (j = 0; j < track->chunks; j++) { snprintf(filename, sizeof(filename), "%s/Fragments(%s=%"PRId64")", dirname, type, track->offsets[j].time); avio_seek(in, track->offsets[j].offset, SEEK_SET); if (ismf) fprintf(out, "%s %"PRId64, filename, avio_tell(in)); if (split) fragment_ret = write_fragment(filename, in); else fragment_ret = skip_fragment(in); if (ismf) fprintf(out, " %"PRId64"\n", avio_tell(in)); if (fragment_ret != 0) { fprintf(stderr, "failed fragment %d in track %d (%s)\n", j, track->track_id, track->name); ret = fragment_ret; } } } fail: if (out) fclose(out); return ret; } static int64_t read_trun_duration(AVIOContext *in, int default_duration, int64_t end) { int64_t dts = 0; int64_t pos; int flags, i; int entries; int64_t first_pts = 0; int64_t max_pts = 0; avio_r8(in); /* version */ flags = avio_rb24(in); if (default_duration <= 0 && !(flags & MOV_TRUN_SAMPLE_DURATION)) { fprintf(stderr, "No sample duration in trun flags\n"); return -1; } entries = avio_rb32(in); if (flags & MOV_TRUN_DATA_OFFSET) avio_rb32(in); if (flags & MOV_TRUN_FIRST_SAMPLE_FLAGS) avio_rb32(in); pos = avio_tell(in); for (i = 0; i < entries && pos < end; i++) { int sample_duration = default_duration; int64_t pts = dts; if (flags & MOV_TRUN_SAMPLE_DURATION) sample_duration = avio_rb32(in); if (flags & MOV_TRUN_SAMPLE_SIZE) avio_rb32(in); if (flags & MOV_TRUN_SAMPLE_FLAGS) avio_rb32(in); if (flags & MOV_TRUN_SAMPLE_CTS) pts += avio_rb32(in); if (sample_duration < 0) { fprintf(stderr, "Negative sample duration %d\n", sample_duration); return -1; } if (i == 0) first_pts = pts; max_pts = FFMAX(max_pts, pts + sample_duration); dts += sample_duration; pos = avio_tell(in); } return max_pts - first_pts; } static int64_t read_moof_duration(AVIOContext *in, int64_t offset) { int64_t ret = -1; int32_t moof_size, size, tag; int64_t pos = 0; int default_duration = 0; avio_seek(in, offset, SEEK_SET); moof_size = avio_rb32(in); tag = avio_rb32(in); if (expect_tag(tag, MKBETAG('m', 'o', 'o', 'f')) != 0) goto fail; while (pos < offset + moof_size) { pos = avio_tell(in); size = avio_rb32(in); tag = avio_rb32(in); if (tag == MKBETAG('t', 'r', 'a', 'f')) { int64_t traf_pos = pos; int64_t traf_size = size; while (pos < traf_pos + traf_size) { pos = avio_tell(in); size = avio_rb32(in); tag = avio_rb32(in); if (tag == MKBETAG('t', 'f', 'h', 'd')) { int flags = 0; avio_r8(in); /* version */ flags = avio_rb24(in); avio_rb32(in); /* track_id */ if (flags & MOV_TFHD_BASE_DATA_OFFSET) avio_rb64(in); if (flags & MOV_TFHD_STSD_ID) avio_rb32(in); if (flags & MOV_TFHD_DEFAULT_DURATION) default_duration = avio_rb32(in); } if (tag == MKBETAG('t', 'r', 'u', 'n')) { return read_trun_duration(in, default_duration, pos + size); } avio_seek(in, pos + size, SEEK_SET); } fprintf(stderr, "Couldn't find trun\n"); goto fail; } avio_seek(in, pos + size, SEEK_SET); } fprintf(stderr, "Couldn't find traf\n"); fail: return ret; } static int read_tfra(struct Tracks *tracks, int start_index, AVIOContext *f) { int ret = AVERROR_EOF, track_id; int version, fieldlength, i, j; int64_t pos = avio_tell(f); uint32_t size = avio_rb32(f); struct Track *track = NULL; if (avio_rb32(f) != MKBETAG('t', 'f', 'r', 'a')) goto fail; version = avio_r8(f); avio_rb24(f); track_id = avio_rb32(f); /* track id */ for (i = start_index; i < tracks->nb_tracks && !track; i++) if (tracks->tracks[i]->track_id == track_id) track = tracks->tracks[i]; if (!track) { /* Ok, continue parsing the next atom */ ret = 0; goto fail; } fieldlength = avio_rb32(f); track->chunks = avio_rb32(f); track->offsets = av_mallocz(sizeof(*track->offsets) * track->chunks); if (!track->offsets) { ret = AVERROR(ENOMEM); goto fail; } // The duration here is always the difference between consecutive // start times. for (i = 0; i < track->chunks; i++) { if (version == 1) { track->offsets[i].time = avio_rb64(f); track->offsets[i].offset = avio_rb64(f); } else { track->offsets[i].time = avio_rb32(f); track->offsets[i].offset = avio_rb32(f); } for (j = 0; j < ((fieldlength >> 4) & 3) + 1; j++) avio_r8(f); for (j = 0; j < ((fieldlength >> 2) & 3) + 1; j++) avio_r8(f); for (j = 0; j < ((fieldlength >> 0) & 3) + 1; j++) avio_r8(f); if (i > 0) track->offsets[i - 1].duration = track->offsets[i].time - track->offsets[i - 1].time; } if (track->chunks > 0) { track->offsets[track->chunks - 1].duration = track->offsets[0].time + track->duration - track->offsets[track->chunks - 1].time; } // Now try and read the actual durations from the trun sample data. for (i = 0; i < track->chunks; i++) { int64_t duration = read_moof_duration(f, track->offsets[i].offset); if (duration > 0 && llabs(duration - track->offsets[i].duration) > 3) { // 3 allows for integer duration to drift a few units, // e.g., for 1/3 durations track->offsets[i].duration = duration; } } if (track->chunks > 0) { if (track->offsets[track->chunks - 1].duration <= 0) { fprintf(stderr, "Calculated last chunk duration for track %d " "was non-positive (%"PRId64"), probably due to missing " "fragments ", track->track_id, track->offsets[track->chunks - 1].duration); if (track->chunks > 1) { track->offsets[track->chunks - 1].duration = track->offsets[track->chunks - 2].duration; } else { track->offsets[track->chunks - 1].duration = 1; } fprintf(stderr, "corrected to %"PRId64"\n", track->offsets[track->chunks - 1].duration); track->duration = track->offsets[track->chunks - 1].time + track->offsets[track->chunks - 1].duration - track->offsets[0].time; fprintf(stderr, "Track duration corrected to %"PRId64"\n", track->duration); } } ret = 0; fail: avio_seek(f, pos + size, SEEK_SET); return ret; } static int read_mfra(struct Tracks *tracks, int start_index, const char *file, int split, int ismf, const char *basename, const char* output_prefix) { int err = 0; const char* err_str = ""; AVIOContext *f = NULL; int32_t mfra_size; if ((err = avio_open2(&f, file, AVIO_FLAG_READ, NULL, NULL)) < 0) goto fail; avio_seek(f, avio_size(f) - 4, SEEK_SET); mfra_size = avio_rb32(f); avio_seek(f, -mfra_size, SEEK_CUR); if (avio_rb32(f) != mfra_size) { err = AVERROR_INVALIDDATA; err_str = "mfra size mismatch"; goto fail; } if (avio_rb32(f) != MKBETAG('m', 'f', 'r', 'a')) { err = AVERROR_INVALIDDATA; err_str = "mfra tag mismatch"; goto fail; } while (!read_tfra(tracks, start_index, f)) { /* Empty */ } if (split || ismf) err = write_fragments(tracks, start_index, f, basename, split, ismf, output_prefix); err_str = "error in write_fragments"; fail: if (f) avio_close(f); if (err) fprintf(stderr, "Unable to read the MFRA atom in %s (%s)\n", file, err_str); return err; } static int get_private_data(struct Track *track, AVCodecParameters *codecpar) { track->codec_private_size = codecpar->extradata_size; track->codec_private = av_mallocz(codecpar->extradata_size); if (!track->codec_private) return AVERROR(ENOMEM); memcpy(track->codec_private, codecpar->extradata, codecpar->extradata_size); return 0; } static int get_video_private_data(struct Track *track, AVCodecParameters *codecpar) { AVIOContext *io = NULL; uint16_t sps_size, pps_size; int err; if (codecpar->codec_id == AV_CODEC_ID_VC1) return get_private_data(track, codecpar); if ((err = avio_open_dyn_buf(&io)) < 0) goto fail; err = AVERROR(EINVAL); if (codecpar->extradata_size < 11 || codecpar->extradata[0] != 1) goto fail; sps_size = AV_RB16(&codecpar->extradata[6]); if (11 + sps_size > codecpar->extradata_size) goto fail; avio_wb32(io, 0x00000001); avio_write(io, &codecpar->extradata[8], sps_size); pps_size = AV_RB16(&codecpar->extradata[9 + sps_size]); if (11 + sps_size + pps_size > codecpar->extradata_size) goto fail; avio_wb32(io, 0x00000001); avio_write(io, &codecpar->extradata[11 + sps_size], pps_size); err = 0; fail: track->codec_private_size = avio_close_dyn_buf(io, &track->codec_private); return err; } static int handle_file(struct Tracks *tracks, const char *file, int split, int ismf, const char *basename, const char* output_prefix) { AVFormatContext *ctx = NULL; int err = 0, i, orig_tracks = tracks->nb_tracks; char errbuf[50], *ptr; struct Track *track; err = avformat_open_input(&ctx, file, NULL, NULL); if (err < 0) { av_strerror(err, errbuf, sizeof(errbuf)); fprintf(stderr, "Unable to open %s: %s\n", file, errbuf); return 1; } err = avformat_find_stream_info(ctx, NULL); if (err < 0) { av_strerror(err, errbuf, sizeof(errbuf)); fprintf(stderr, "Unable to identify %s: %s\n", file, errbuf); goto fail; } if (ctx->nb_streams < 1) { fprintf(stderr, "No streams found in %s\n", file); goto fail; } for (i = 0; i < ctx->nb_streams; i++) { struct Track **temp; AVStream *st = ctx->streams[i]; if (st->codecpar->bit_rate == 0) { fprintf(stderr, "Skipping track %d in %s as it has zero bitrate\n", st->id, file); continue; } track = av_mallocz(sizeof(*track)); if (!track) { err = AVERROR(ENOMEM); goto fail; } temp = av_realloc(tracks->tracks, sizeof(*tracks->tracks) * (tracks->nb_tracks + 1)); if (!temp) { av_free(track); err = AVERROR(ENOMEM); goto fail; } tracks->tracks = temp; tracks->tracks[tracks->nb_tracks] = track; track->name = file; if ((ptr = strrchr(file, '/'))) track->name = ptr + 1; track->bitrate = st->codecpar->bit_rate; track->track_id = st->id; track->timescale = st->time_base.den; track->duration = st->duration; track->is_audio = st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO; track->is_video = st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO; if (!track->is_audio && !track->is_video) { fprintf(stderr, "Track %d in %s is neither video nor audio, skipping\n", track->track_id, file); av_freep(&tracks->tracks[tracks->nb_tracks]); continue; } tracks->duration = FFMAX(tracks->duration, av_rescale_rnd(track->duration, AV_TIME_BASE, track->timescale, AV_ROUND_UP)); if (track->is_audio) { if (tracks->audio_track < 0) tracks->audio_track = tracks->nb_tracks; tracks->nb_audio_tracks++; track->channels = st->codecpar->channels; track->sample_rate = st->codecpar->sample_rate; if (st->codecpar->codec_id == AV_CODEC_ID_AAC) { track->fourcc = "AACL"; track->tag = 255; track->blocksize = 4; } else if (st->codecpar->codec_id == AV_CODEC_ID_WMAPRO) { track->fourcc = "WMAP"; track->tag = st->codecpar->codec_tag; track->blocksize = st->codecpar->block_align; } get_private_data(track, st->codecpar); } if (track->is_video) { if (tracks->video_track < 0) tracks->video_track = tracks->nb_tracks; tracks->nb_video_tracks++; track->width = st->codecpar->width; track->height = st->codecpar->height; if (st->codecpar->codec_id == AV_CODEC_ID_H264) track->fourcc = "H264"; else if (st->codecpar->codec_id == AV_CODEC_ID_VC1) track->fourcc = "WVC1"; get_video_private_data(track, st->codecpar); } tracks->nb_tracks++; } avformat_close_input(&ctx); err = read_mfra(tracks, orig_tracks, file, split, ismf, basename, output_prefix); fail: if (ctx) avformat_close_input(&ctx); return err; } static void output_server_manifest(struct Tracks *tracks, const char *basename, const char *output_prefix, const char *path_prefix, const char *ismc_prefix) { char filename[1000]; FILE *out; int i; snprintf(filename, sizeof(filename), "%s%s.ism", output_prefix, basename); out = fopen(filename, "w"); if (!out) { perror(filename); return; } fprintf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"); fprintf(out, "<smil xmlns=\"http://www.w3.org/2001/SMIL20/Language\">\n"); fprintf(out, "\t<head>\n"); fprintf(out, "\t\t<meta name=\"clientManifestRelativePath\" " "content=\"%s%s.ismc\" />\n", ismc_prefix, basename); fprintf(out, "\t</head>\n"); fprintf(out, "\t<body>\n"); fprintf(out, "\t\t<switch>\n"); for (i = 0; i < tracks->nb_tracks; i++) { struct Track *track = tracks->tracks[i]; const char *type = track->is_video ? "video" : "audio"; fprintf(out, "\t\t\t<%s src=\"%s%s\" systemBitrate=\"%d\">\n", type, path_prefix, track->name, track->bitrate); fprintf(out, "\t\t\t\t<param name=\"trackID\" value=\"%d\" " "valueType=\"data\" />\n", track->track_id); fprintf(out, "\t\t\t</%s>\n", type); } fprintf(out, "\t\t</switch>\n"); fprintf(out, "\t</body>\n"); fprintf(out, "</smil>\n"); fclose(out); } static void print_track_chunks(FILE *out, struct Tracks *tracks, int main, const char *type) { int i, j; int64_t pos = 0; struct Track *track = tracks->tracks[main]; int should_print_time_mismatch = 1; for (i = 0; i < track->chunks; i++) { for (j = main + 1; j < tracks->nb_tracks; j++) { if (tracks->tracks[j]->is_audio == track->is_audio) { if (track->offsets[i].duration != tracks->tracks[j]->offsets[i].duration) { fprintf(stderr, "Mismatched duration of %s chunk %d in %s (%d) and %s (%d)\n", type, i, track->name, main, tracks->tracks[j]->name, j); should_print_time_mismatch = 1; } if (track->offsets[i].time != tracks->tracks[j]->offsets[i].time) { if (should_print_time_mismatch) fprintf(stderr, "Mismatched (start) time of %s chunk %d in %s (%d) and %s (%d)\n", type, i, track->name, main, tracks->tracks[j]->name, j); should_print_time_mismatch = 0; } } } fprintf(out, "\t\t<c n=\"%d\" d=\"%"PRId64"\" ", i, track->offsets[i].duration); if (pos != track->offsets[i].time) { fprintf(out, "t=\"%"PRId64"\" ", track->offsets[i].time); pos = track->offsets[i].time; } pos += track->offsets[i].duration; fprintf(out, "/>\n"); } } static void output_client_manifest(struct Tracks *tracks, const char *basename, const char *output_prefix, int split) { char filename[1000]; FILE *out; int i, j; if (split) snprintf(filename, sizeof(filename), "%sManifest", output_prefix); else snprintf(filename, sizeof(filename), "%s%s.ismc", output_prefix, basename); out = fopen(filename, "w"); if (!out) { perror(filename); return; } fprintf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"); fprintf(out, "<SmoothStreamingMedia MajorVersion=\"2\" MinorVersion=\"0\" " "Duration=\"%"PRId64 "\">\n", tracks->duration * 10); if (tracks->video_track >= 0) { struct Track *track = tracks->tracks[tracks->video_track]; struct Track *first_track = track; int index = 0; fprintf(out, "\t<StreamIndex Type=\"video\" QualityLevels=\"%d\" " "Chunks=\"%d\" " "Url=\"QualityLevels({bitrate})/Fragments(video={start time})\">\n", tracks->nb_video_tracks, track->chunks); for (i = 0; i < tracks->nb_tracks; i++) { track = tracks->tracks[i]; if (!track->is_video) continue; fprintf(out, "\t\t<QualityLevel Index=\"%d\" Bitrate=\"%d\" " "FourCC=\"%s\" MaxWidth=\"%d\" MaxHeight=\"%d\" " "CodecPrivateData=\"", index, track->bitrate, track->fourcc, track->width, track->height); for (j = 0; j < track->codec_private_size; j++) fprintf(out, "%02X", track->codec_private[j]); fprintf(out, "\" />\n"); index++; if (track->chunks != first_track->chunks) fprintf(stderr, "Mismatched number of video chunks in %s (id: %d, chunks %d) and %s (id: %d, chunks %d)\n", track->name, track->track_id, track->chunks, first_track->name, first_track->track_id, first_track->chunks); } print_track_chunks(out, tracks, tracks->video_track, "video"); fprintf(out, "\t</StreamIndex>\n"); } if (tracks->audio_track >= 0) { struct Track *track = tracks->tracks[tracks->audio_track]; struct Track *first_track = track; int index = 0; fprintf(out, "\t<StreamIndex Type=\"audio\" QualityLevels=\"%d\" " "Chunks=\"%d\" " "Url=\"QualityLevels({bitrate})/Fragments(audio={start time})\">\n", tracks->nb_audio_tracks, track->chunks); for (i = 0; i < tracks->nb_tracks; i++) { track = tracks->tracks[i]; if (!track->is_audio) continue; fprintf(out, "\t\t<QualityLevel Index=\"%d\" Bitrate=\"%d\" " "FourCC=\"%s\" SamplingRate=\"%d\" Channels=\"%d\" " "BitsPerSample=\"16\" PacketSize=\"%d\" " "AudioTag=\"%d\" CodecPrivateData=\"", index, track->bitrate, track->fourcc, track->sample_rate, track->channels, track->blocksize, track->tag); for (j = 0; j < track->codec_private_size; j++) fprintf(out, "%02X", track->codec_private[j]); fprintf(out, "\" />\n"); index++; if (track->chunks != first_track->chunks) fprintf(stderr, "Mismatched number of audio chunks in %s and %s\n", track->name, first_track->name); } print_track_chunks(out, tracks, tracks->audio_track, "audio"); fprintf(out, "\t</StreamIndex>\n"); } fprintf(out, "</SmoothStreamingMedia>\n"); fclose(out); } static void clean_tracks(struct Tracks *tracks) { int i; for (i = 0; i < tracks->nb_tracks; i++) { av_freep(&tracks->tracks[i]->codec_private); av_freep(&tracks->tracks[i]->offsets); av_freep(&tracks->tracks[i]); } av_freep(&tracks->tracks); tracks->nb_tracks = 0; } int main(int argc, char **argv) { const char *basename = NULL; const char *path_prefix = "", *ismc_prefix = ""; const char *output_prefix = ""; char output_prefix_buf[2048]; int split = 0, ismf = 0, i; struct Tracks tracks = { 0, .video_track = -1, .audio_track = -1 }; av_register_all(); for (i = 1; i < argc; i++) { if (!strcmp(argv[i], "-n")) { basename = argv[i + 1]; i++; } else if (!strcmp(argv[i], "-path-prefix")) { path_prefix = argv[i + 1]; i++; } else if (!strcmp(argv[i], "-ismc-prefix")) { ismc_prefix = argv[i + 1]; i++; } else if (!strcmp(argv[i], "-output")) { output_prefix = argv[i + 1]; i++; if (output_prefix[strlen(output_prefix) - 1] != '/') { snprintf(output_prefix_buf, sizeof(output_prefix_buf), "%s/", output_prefix); output_prefix = output_prefix_buf; } } else if (!strcmp(argv[i], "-split")) { split = 1; } else if (!strcmp(argv[i], "-ismf")) { ismf = 1; } else if (argv[i][0] == '-') { return usage(argv[0], 1); } else { if (!basename) ismf = 0; if (handle_file(&tracks, argv[i], split, ismf, basename, output_prefix)) return 1; } } if (!tracks.nb_tracks || (!basename && !split)) return usage(argv[0], 1); if (!split) output_server_manifest(&tracks, basename, output_prefix, path_prefix, ismc_prefix); output_client_manifest(&tracks, basename, output_prefix, split); clean_tracks(&tracks); return 0; }