From 2ac736a6dadd174d1056beb75de6f85022b4fd1e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Reimar=20D=C3=B6ffinger?= <Reimar.Doeffinger@gmx.de>
Date: Mon, 16 Mar 2009 20:49:52 +0000
Subject: [PATCH] Extend mov edit list support to work for a first padding
entry with time == -1 and duration. Complicated since time is relative to
stream, duration relative to container time base.
Originally committed as revision 18019 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
libavformat/mov.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/libavformat/mov.c b/libavformat/mov.c
index eec6ce59a6b..bb0c035ca64 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -1278,8 +1278,9 @@ static void mov_build_index(MOVContext *mov, AVStream *st)
/* adjust first dts according to edit list */
if (sc->time_offset) {
+ int rescaled = sc->time_offset < 0 ? av_rescale(sc->time_offset, sc->time_scale, mov->time_scale) : sc->time_offset;
assert(sc->time_offset % sc->time_rate == 0);
- current_dts = - (sc->time_offset / sc->time_rate);
+ current_dts = - (rescaled / sc->time_rate);
}
/* only use old uncompressed audio chunk demuxing when stts specifies it */
@@ -1774,12 +1775,12 @@ static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
for(i=0; i<edit_count; i++){
int time;
- get_be32(pb); /* Track duration */
+ int duration = get_be32(pb); /* Track duration */
time = get_be32(pb); /* Media time */
get_be32(pb); /* Media rate */
- if (i == 0 && time != -1) {
- sc->time_offset = time;
- sc->time_rate = av_gcd(sc->time_rate, time);
+ if (i == 0 && time >= -1) {
+ sc->time_offset = time != -1 ? time : -duration;
+ sc->time_rate = av_gcd(sc->time_rate, FFABS(sc->time_offset));
}
}
--
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