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mov: Make sure no streams after the header lack a timescale.

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Fixes division by 0

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-11-10 13:28:26 +01:00
parent cc5c2ef09d
commit eb3dc23705
1 changed files with 12 additions and 6 deletions
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18
libavformat/mov.c
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@ -2170,6 +2170,16 @@ static int mov_open_dref(AVIOContext **pb, const char *src, MOVDref *ref,
return AVERROR(ENOENT);
}
static void fix_timescale(MOVContext *c, MOVStreamContext *sc)
{
if (sc->time_scale <= 0) {
av_log(c->fc, AV_LOG_WARNING, "stream %d, timescale not set\n", sc->ffindex);
sc->time_scale = c->time_scale;
if (sc->time_scale <= 0)
sc->time_scale = 1;
}
}
static int mov_read_trak(MOVContext *c, AVIOContext *pb, MOVAtom atom)
{
AVStream *st;
@ -2197,12 +2207,7 @@ static int mov_read_trak(MOVContext *c, AVIOContext *pb, MOVAtom atom)
return 0;
}
if (sc->time_scale <= 0) {
av_log(c->fc, AV_LOG_WARNING, "stream %d, timescale not set\n", st->index);
sc->time_scale = c->time_scale;
if (sc->time_scale <= 0)
sc->time_scale = 1;
}
fix_timescale(c, sc);
avpriv_set_pts_info(st, 64, 1, sc->time_scale);
@ -3180,6 +3185,7 @@ static int mov_read_header(AVFormatContext *s)
for (i = 0; i < s->nb_streams; i++) {
AVStream *st = s->streams[i];
MOVStreamContext *sc = st->priv_data;
fix_timescale(mov, sc);
if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO && st->codec->codec_id == AV_CODEC_ID_AAC) {
st->skip_samples = sc->start_pad;
}