Make "invalid dts/pts combination" a debug instead of a warning message.

Patch by XBMC

Originally committed as revision 23919 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/utils.c

@@ -908,7 +908,7 @@ static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
     // we take the conservative approach and discard both
     // Note, if this is misbehaving for a H.264 file then possibly presentation_delayed is not set correctly.
     if(delay==1 && pkt->dts == pkt->pts && pkt->dts != AV_NOPTS_VALUE && presentation_delayed){
-        av_log(s, AV_LOG_WARNING, "invalid dts/pts combination\n");
+        av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination\n");
         pkt->dts= pkt->pts= AV_NOPTS_VALUE;
     }