Bug fix of wrong duration

Change-Id: I97a603a69afa5fd339ef1fd87defef467f2e05b5

diff --git a/libavformat/mov.c b/libavformat/mov.c
index b975e01..37e9584 100755 (executable)
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -2942,7 +2942,8 @@ static int mov_read_trex(MOVContext *c, AVIOContext *pb, MOVAtom atom)
         return err;
     }
 
-    c->fc->duration = AV_NOPTS_VALUE; // the duration from mvhd is not representing the whole file when fragments are used.
+    if (c->fc->duration == 0)
+        c->fc->duration = AV_NOPTS_VALUE; // the duration from mvhd is not representing the whole file when fragments are used.
 
     trex = &c->trex_data[c->trex_count++];
     avio_r8(pb); /* version */