lavf/utils: use correct format string for int64_t.

libavformat/utils.c

@@ -1014,7 +1014,7 @@ 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_DEBUG, "invalid dts/pts combination %Ld\n", pkt->dts);
+        av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination %"PRIi64"\n", pkt->dts);
         pkt->dts= pkt->pts= AV_NOPTS_VALUE;
     }