Warn about packed B frames. (especially usefull if the file in question is

not an avi ...)


git-svn-id: file:///var/local/repositories/ffmpeg/trunk@13428 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavcodec/h263.c

@@ -5751,6 +5751,8 @@ static int decode_user_data(MpegEncContext *s, GetBitContext *gb){
         s->divx_version= ver;
         s->divx_build= build;
         s->divx_packed= e==3 && last=='p';
+        if(s->divx_packed)
+            av_log(s->avctx, AV_LOG_WARNING, "Invalid and inefficient vfw-avi packed B frames detected\n");
     }
 
     /* ffmpeg detection */