calculate default_duration for AAC tracks

Originally committed as revision 8364 to svn://svn.ffmpeg.org/ffmpeg/trunk

diff --git a/libavformat/matroska.c b/libavformat/matroska.c
index b3ea7a0..d1b76f5 100644 (file)
--- a/libavformat/matroska.c
+++ b/libavformat/matroska.c
@@ -2313,6 +2313,7 @@ matroska_read_header (AVFormatContext    *s,
                 } else {
                     extradata_size = 2;
                 }
+                track->default_duration = 1024*1000 / audiotrack->internal_samplerate;
             }
 
             else if (codec_id == CODEC_ID_TTA) {