avformat/oggparsedirac: use AVCodecContext.framerate

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavformat/oggparsedirac.c

@@ -43,7 +43,7 @@ static int dirac_header(AVFormatContext *s, int idx)
     st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
     st->codec->codec_id = AV_CODEC_ID_DIRAC;
     // dirac in ogg always stores timestamps as though the video were interlaced
-    avpriv_set_pts_info(st, 64, st->codec->time_base.num, 2*st->codec->time_base.den);
+    avpriv_set_pts_info(st, 64, st->codec->framerate.den, 2*st->codec->framerate.num);
     return 1;
 }