diff options
-rw-r--r-- | doc/muxers.texi | 4 | ||||
-rw-r--r-- | libavformat/movenc.c | 12 | ||||
-rw-r--r-- | libavformat/movenc.h | 1 |
3 files changed, 15 insertions, 2 deletions
diff --git a/doc/muxers.texi b/doc/muxers.texi index db905e3a05..809f88662e 100644 --- a/doc/muxers.texi +++ b/doc/muxers.texi @@ -1330,6 +1330,10 @@ more efficient), but with this option set, the muxer writes one moof/mdat pair for each track, making it easier to separate tracks. This option is implicitly set when writing ismv (Smooth Streaming) files. +@item -movflags skip_sidx +Skip writing of sidx atom. When bitrate overhead due to sidx atom is high, +this option could be used for cases where sidx atom is not mandatory. +When global_sidx flag is enabled, this option will be ignored. @item -movflags faststart Run a second pass moving the index (moov atom) to the beginning of the file. This operation can take a while, and will not work in various situations such diff --git a/libavformat/movenc.c b/libavformat/movenc.c index 6dab5193b0..28cf8b719c 100644 --- a/libavformat/movenc.c +++ b/libavformat/movenc.c @@ -75,6 +75,7 @@ static const AVOption options[] = { { "frag_discont", "Signal that the next fragment is discontinuous from earlier ones", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_FRAG_DISCONT}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" }, { "delay_moov", "Delay writing the initial moov until the first fragment is cut, or until the first fragment flush", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_DELAY_MOOV}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" }, { "global_sidx", "Write a global sidx index at the start of the file", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_GLOBAL_SIDX}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" }, + { "skip_sidx", "Skip writing of sidx atom", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_SKIP_SIDX}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" }, { "write_colr", "Write colr atom (Experimental, may be renamed or changed, do not use from scripts)", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_WRITE_COLR}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" }, { "write_gama", "Write deprecated gama atom", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_WRITE_GAMA}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" }, { "use_metadata_tags", "Use mdta atom for metadata.", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_USE_MDTA}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" }, @@ -4603,7 +4604,8 @@ static int mov_write_moof_tag(AVIOContext *pb, MOVMuxContext *mov, int tracks, mov_write_moof_tag_internal(avio_buf, mov, tracks, 0); moof_size = ffio_close_null_buf(avio_buf); - if (mov->flags & FF_MOV_FLAG_DASH && !(mov->flags & FF_MOV_FLAG_GLOBAL_SIDX)) + if (mov->flags & FF_MOV_FLAG_DASH && + !(mov->flags & (FF_MOV_FLAG_GLOBAL_SIDX | FF_MOV_FLAG_SKIP_SIDX))) mov_write_sidx_tags(pb, mov, tracks, moof_size + 8 + mdat_size); if (mov->write_prft > MOV_PRFT_NONE && mov->write_prft < MOV_PRFT_NB) @@ -5422,7 +5424,8 @@ int ff_mov_write_packet(AVFormatContext *s, AVPacket *pkt) * the next fragment. This means the cts of the first sample must * be the same in all fragments, unless end_pts was updated by * the packet causing the fragment to be written. */ - if ((mov->flags & FF_MOV_FLAG_DASH && !(mov->flags & FF_MOV_FLAG_GLOBAL_SIDX)) || + if ((mov->flags & FF_MOV_FLAG_DASH && + !(mov->flags & (FF_MOV_FLAG_GLOBAL_SIDX | FF_MOV_FLAG_SKIP_SIDX))) || mov->mode == MODE_ISM) pkt->pts = pkt->dts + trk->end_pts - trk->cluster[trk->entry].dts; } else { @@ -6067,6 +6070,11 @@ static int mov_init(AVFormatContext *s) s->flags &= ~AVFMT_FLAG_AUTO_BSF; } + if (mov->flags & FF_MOV_FLAG_GLOBAL_SIDX && mov->flags & FF_MOV_FLAG_SKIP_SIDX) { + av_log(s, AV_LOG_WARNING, "Global SIDX enabled; Ignoring skip_sidx option\n"); + mov->flags &= ~FF_MOV_FLAG_SKIP_SIDX; + } + if (mov->flags & FF_MOV_FLAG_FASTSTART) { mov->reserved_moov_size = -1; } diff --git a/libavformat/movenc.h b/libavformat/movenc.h index fe605d1ad2..68d6f23a5a 100644 --- a/libavformat/movenc.h +++ b/libavformat/movenc.h @@ -257,6 +257,7 @@ typedef struct MOVMuxContext { #define FF_MOV_FLAG_SKIP_TRAILER (1 << 18) #define FF_MOV_FLAG_NEGATIVE_CTS_OFFSETS (1 << 19) #define FF_MOV_FLAG_FRAG_EVERY_FRAME (1 << 20) +#define FF_MOV_FLAG_SKIP_SIDX (1 << 21) int ff_mov_write_packet(AVFormatContext *s, AVPacket *pkt); |