Increase the number of packets required to identify as MPEG PES to keep from

identifying MP3 files with padding or garbage at the beginning.

Originally committed as revision 17091 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/mpeg.c

@@ -83,7 +83,7 @@ static int mpegps_probe(AVProbeData *p)
         return AVPROBE_SCORE_MAX/2+2; // +1 for .mpg
     if(priv1 + vid + audio > invalid && (priv1+vid+audio)*9 <= pspack*10)
         return AVPROBE_SCORE_MAX/2+2; // +1 for .mpg
-    if((!!vid ^ !!audio) && (audio+vid > 1) && !sys && !pspack && p->buf_size>2048) /* PES stream */
+    if((!!vid ^ !!audio) && (audio > 4 || vid > 1) && !sys && !pspack && p->buf_size>2048) /* PES stream */
         return AVPROBE_SCORE_MAX/2+2;
 
     //02-Penguin.flac has sys:0 priv1:0 pspack:0 vid:0 audio:1