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libavcodec: Don't crash in avcodec_encode_audio if time_base isn't set 

Earlier, calling avcodec_encode_audio worked fine even if time_base
wasn't set. Now it crashes due to trying to scale the output pts to
the codec context time base. This affects e.g. VLC.

If no time_base is set for audio codecs, set it to the sample
rate.

CC: libav-stable@libav.org
Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Martin Storsjö 2012-01-26 21:37:38 +02:00
parent bca77a1a64
commit 9a7dc618c5
1 changed files with 6 additions and 0 deletions
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6
libavcodec/utils.c
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@ -714,6 +714,12 @@ int attribute_align_arg avcodec_open2(AVCodecContext *avctx, AVCodec *codec, AVD
}
avctx->frame_number = 0;
if (avctx->codec_type == AVMEDIA_TYPE_AUDIO &&
(!avctx->time_base.num || !avctx->time_base.den)) {
avctx->time_base.num = 1;
avctx->time_base.den = avctx->sample_rate;
}
if (HAVE_THREADS && !avctx->thread_opaque) {
ret = ff_thread_init(avctx);
if (ret < 0) {