mvdh.patch

--- libavformat/movenc_old.c	2020-04-22 14:44:40.214872728 +0800
+++ libavformat/movenc.c	2020-04-21 23:03:02.553841690 +0800
@@ -3962,9 +3962,9 @@
             mov->tracks[src_trk].tref_tag = mov->tracks[i].tag;
             mov->tracks[src_trk].tref_id  = mov->tracks[i].track_id;
             //src_trk may have a different timescale than the tmcd track
-            mov->tracks[i].track_duration = av_rescale(mov->tracks[src_trk].track_duration,
+            mov->tracks[i].track_duration = 0;/*av_rescale(mov->tracks[src_trk].track_duration,
                                                        mov->tracks[i].timescale,
-                                                       mov->tracks[src_trk].timescale);
+                                                       mov->tracks[src_trk].timescale);*/
         }
     }