diff --git a/libavformat/mov.c b/libavformat/mov.c
index 05521fd..6c6da78 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -769,6 +769,8 @@ static int mov_read_mdhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
         av_dict_set(&st->metadata, "language", language, 0);
     avio_rb16(pb); /* quality */

+       st->duration = c->duration;
+    av_log(0,0,"dur : %lld\ntimescale : %d\n",st->duration,sc->time_scale);
     return 0;
 }