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avformat/movenc: disallow buggy flags combination

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Use of hybrid_fragmented and faststart together can result in files with
loss of sync and bitstream parsing errors upon playback.
This commit is contained in:
Gyan Doshi 2025-05-26 18:12:58 +05:30
parent eda0ac7e5f
commit c79bce92b8
1 changed files with 6 additions and 0 deletions
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6
libavformat/movenc.c
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@ -7731,6 +7731,12 @@ static int mov_init(AVFormatContext *s)
FF_MOV_FLAG_FRAG_EVERY_FRAME))
mov->flags |= FF_MOV_FLAG_FRAGMENT;
if (mov->flags & FF_MOV_FLAG_HYBRID_FRAGMENTED &&
mov->flags & FF_MOV_FLAG_FASTSTART) {
av_log(s, AV_LOG_ERROR, "Setting both hybrid_fragmented and faststart is not supported.\n");
return AVERROR(EINVAL);
}
/* Set other implicit flags immediately */
if (mov->flags & FF_MOV_FLAG_HYBRID_FRAGMENTED)
mov->flags |= FF_MOV_FLAG_FRAGMENT;