Retain chapters when merging two videos

[mifi]

Discussed in #2164

^{Originally posted by jadoff630 September 20, 2024}
I have two videos that I am trying to merge into one. The merging goes well, but I am trying to keep the chapter markers from both files when I combine. Right now when I combine, only the chapters from the first file are there.

I opened each file in the editor viewer before, selecting to import chapters, and there are now proj.llc files for the two videos.

In merge settings, I have checked the following options:

• "Include all tracks...."
• "preserve original metadata..."
• "Preserve all MP4/MOV metadata"

Possible solution: https://gist.github.com/FabianBartl/16396586d5022b422817c6c3d5ec4d26