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: [email protected] Signed-off-by: Martin Storsjö <[email protected]>
SaschaVasarrhelyi · Jan 27, 2012 · 9a7dc61 · 9a7dc61
1 parent bca77a1
commit 9a7dc61
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/libavcodec/utils.c b/libavcodec/utils.c
@@ -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) {