--- libavformat/matroskaenc.c 2018-08-10 22:18:59.051659000 +0200 +++ libavformat/matroskaenc2.c 2018-08-10 22:18:31.932030400 +0200 @@ -2671,8 +2671,8 @@ } for (i = 0; i < s->nb_streams; i++) { - // ms precision is the de-facto standard timescale for mkv files - avpriv_set_pts_info(s->streams[i], 64, 1, 1000); + // ms precision is the de-facto standard timescale for mkv files (Patched: We're using microseconds!!) + avpriv_set_pts_info(s->streams[i], 64, 1, 1000000); } return 0;