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movenc: fix crashes if a stream is empty. 

For some reason this always happens with -f ismv.
See trac issue #996.

Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>
This commit is contained in:
Reimar Döffinger 2012-02-12 12:05:43 +01:00
parent 857d14863d
commit 3ce7148dff
1 changed files with 4 additions and 1 deletions
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5
libavformat/movenc.c
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@ -287,6 +287,8 @@ static unsigned compute_avg_bitrate(MOVTrack *track)
{
uint64_t size = 0;
int i;
if (!track->track_duration)
return 0;
for (i = 0; i < track->entry; i++)
size += track->cluster[i].size;
return size * 8 * track->timescale / track->track_duration;
@ -2052,7 +2054,8 @@ static int mov_write_moov_tag(AVIOContext *pb, MOVMuxContext *mov,
mov->tracks[i].time = mov->time;
mov->tracks[i].track_id = i+1;
build_chunks(&mov->tracks[i]);
if (mov->tracks[i].entry)
build_chunks(&mov->tracks[i]);
}
if (mov->chapter_track)