I have a movie which is split in 2 DVDs (about 3.5h long). I have run the DVD rips through Handbrake and created two MKV files with subtitles. Sound, video and subtitles are in sync in each movie.
I make a full-length MKV movie with mkvmerge -o full.mkv part1.mkv +part2.mkv
Sound and video are still in sync, there seems to be a short blackout (1sec) between the parts, but I am unsure if this is part of the original movie.
Subtitles appear approx. 1 sec. early in the second part of the full length movie.
My question is: How to get this in sync? I have tried the track append option in mkvmerge, which results in sync between sound and subtitle, but then the video is out of sync (seems to appear late).
I have tried to find info about track lenghts with mkvinfo, but without luck. I cannot remove and reapply the subtitles with tsMuxer, because tsMuxer do not recognize the subtitle track from the mkv part files (donøt know why).
Any thoughts? My idea was to shorten the sound and video track of first part with approx. 1 sec., but I can’t figure out how. Alternatively the subtitles of part 2 should be delayed.