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avformat/mov: Autodetect mp3s which need parsing

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mp3 packets all have the same duration and number of samples
if their duration indicated in the container varies then thats an
indication that they are not 1 mp3 packet each.
If this autodetection fails for some case then please contact us
and provide a testcase.

Fixes Ticket4938
This commit is contained in:
Michael Niedermayer 2015-10-23 03:22:43 +02:00
parent a7c5005d7b
commit 573334da82
1 changed files with 7 additions and 0 deletions
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7
libavformat/mov.c
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@ -3105,6 +3105,13 @@ static int mov_read_trak(MOVContext *c, AVIOContext *pb, MOVAtom atom)
break;
}
// If the duration of the mp3 packets is not constant, then they could need a parser
if (st->codec->codec_id == AV_CODEC_ID_MP3
&& sc->stts_count > 3
&& sc->stts_count*10 > st->nb_frames
&& sc->time_scale == st->codec->sample_rate) {
st->need_parsing = AVSTREAM_PARSE_FULL;
}
/* Do not need those anymore. */
av_freep(&sc->chunk_offsets);
av_freep(&sc->stsc_data);