Usage of hybrid_fragmented and faststart together can result in files with
loss of sync and bitstream parsing errors upon playback.
---
libavformat/movenc.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/libavformat/movenc.c b/libavformat/movenc.c
index 4bc8bd1b2a..9392ba5370 100644
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@@ -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;
--
2.49.0
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