From: Michael Niedermayer <[email protected]>
Previously we only wrote the edit list correctly if we had negative
dts but pts == 0 (e.g. for video with B-frames).
This makes sure that audio preroll for e.g. AAC is signaled correctly.
---
libavformat/movenc.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/libavformat/movenc.c b/libavformat/movenc.c
index 6c95b4b..ebdc75c 100644
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@@ -1628,6 +1628,11 @@ static int mov_write_edts_tag(AVIOContext *pb, MOVTrack
*track)
avio_wb32(pb, -1);
}
avio_wb32(pb, 0x00010000);
+ } else {
+ // FFMIN is needed due to rounding; dts might actually be a small
+ // positive integer, but rounded to 0 in MOV_TIMESCALE
+ start_ct = -FFMIN(track->cluster[0].dts, 0);
+ duration += delay;
}
/* duration */
--
1.8.5.2 (Apple Git-48)
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