Quote:
Originally Posted by Mosu
mkvmerge does that automatically. Make sure you actually append the two files. The difference between "mkvmerge -o out.mkv in1.mkv in2.mkv" and "mkvmerge -o out.mkv in1.mkv +in2.mkv" are subtle, but the resulting files are completely different. Same goes for using mmg; use the "add" button for the first and the "append" button for the second file.
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That works fine for video, audio, and subtitles, but it really doesn't work for chapters. If you look in the MMG window when appending files you see the ++ signs appearing next to video, audio, and subs, but it doesn't for chapters.
I solved the problem by writing my own program that takes a chapter file and rewrites it based on a new starting chapter, and length of previous video file so I can concatenate them manually, and add them in to the final MKV.