[FFmpeg-cvslog] libavcodec: Don't crash in avcodec_encode_audio if time_base isn't set

[Martin Storsjö]

ffmpeg | branch: master | Martin Storsjö <martin at martin.st> | Thu Jan 26 21:37:38 2012 +0200| [9a7dc618c50902e7a171f2deda6430d52c277a95] | committer: Martin Storsjö

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 at libav.org
Signed-off-by: Martin Storsjö <martin at martin.st>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=9a7dc618c50902e7a171f2deda6430d52c277a95
---

 libavcodec/utils.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index fadfb0c..707ecb5 100644
--- 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) {