Perhaps someone knows how to convert this combined file into something MKVToolNix will recognise (Ogg or XML) and allow me to thereby mux it into my concert. I have also uploaded a text file with the chapters combined (as best as I could) in simple time format. Thanks so much for your help guys and gals, too!

I have included them in this post as txt files and I am hoping someone knows how to merge them into a single chapter file that MKVToolNix will recognise and that I can then mux them into my otherwise completed MKV concert file. I have managed to extract each DVDs chapters using a program called ChapterXtractor but I don't know how to merge them into a single file or keep them in the correct order. I load the MKV into the program and then uncheck the video and audio checkboxes, leaving only the chapters with a checkmark but it refuses to do what I want. It seems to me that I used to be able to extract chapter files individually from an MKV using this program but now all I get is errors whenever I try to do it. I am horrible with command line options, so let's do it the good old GUI way! I am assuming that MKVToolNix can do this but maybe I am wrong. Please be exacting and walk me through this step by step. What process do I have to follow to get the chapters from the two MKVs to merge in their correct order and then mux into the single combined MKV file?

All I get are the chapters from the first MKV spread over the entire length of the combined MKV, with the second file's chapters lost in action. Even so, the chapters from the second MKV simply refuse to act like the video and audio and append themselves to the first MKV file. I add the first MKV and then use the Append button to add the second MKV, which produces a perfectly good single MKV file with the video and audio all in their correct places one after the other. However, when I try to use MKVToolNix to merge the two MKVs into a single file, the chapters gets screwed up everytime.

Handbrake identified that there were multiple DVDs in the Video TS folder and allowed me to convert them into MKVs separately. I then used Handbrake to convert the concert into two separate MKV files, including their chapters.

Everything ended up in one Video TS folder. I have ripped a dual layer DVD that has a concert divided into two separate parts.

Mkvtoolnix gui merge instructions