2024-01-20, 05:11 PM
Its possible that the files weren't properly authored. You can try using ffmpeg to recreate the files, this requires no reencoding. On the command prompt try this. I've only done this in Linux so I'm not certain if simply using "ffmpeg" in Windows is enough.
Code:
ffmpeg -fflags genpts -i "C:\path\to\video.mkv" -map 0:v -map 0:a -map 0:s -map_chapters 0 -c:v copy -c:a copy -c:s copy outputFile.mkv