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+--- Thread: mkv video chapter editing (/t-mkv-video-chapter-editing)
mkv video chapter editing - He-who-is-tired - 2024-03-29
If you rip a video and want to use something like mkvtoolnix-gui to remove old chapters and put in new ones, and you're adding new chapters rather than just renaming old ones, you should make sure you have distinct 'ChapterUID' tags. I was adding a few extra chapters to a concert film rip I'd done, and just copied/pasted one of the ChapterAtoms a few times and then changed TimeStart, TimeEnd, and ChapterString.
Turns out Jellyfin is likely properly honoring the ChapterUID values, since the ones I had pasted all collapsed into a single long chapter, rather than showing up separately in the UI. To confuse things a little further, programs like VLC showed all chapters I expected, and so I initially thought it was a JF thing, but it was not.
The solution was to simply make sure the ChapterUID were all unique; I suspect I could've eliminated them altogether, but it seemed better to have more identifying data than less.
(example):
<?xml version="1.0"?>
<!-- <!DOCTYPE Chapters SYSTEM "matroskachapters.dtd"> -->
<Chapters>
<EditionEntry>
<EditionFlagHidden>0</EditionFlagHidden>
<EditionFlagDefault>1</EditionFlagDefault>
<EditionUID>17840219969364685340</EditionUID>
<ChapterAtom>
<ChapterUID>10843146008692285875</ChapterUID>
<ChapterTimeStart>00:00:00.083416666</ChapterTimeStart>
<ChapterFlagHidden>0</ChapterFlagHidden>
<ChapterFlagEnabled>1</ChapterFlagEnabled>
<ChapterTimeEnd>00:08:52.000000000</ChapterTimeEnd>
<ChapterDisplay>
<ChapterString>01 Artist 1 - Song1</ChapterString>
<ChapterLanguage>eng</ChapterLanguage>
</ChapterDisplay>
</ChapterAtom>
<ChapterAtom>
<ChapterUID>9633884967479578286</ChapterUID>
<ChapterTimeStart>00:08:52.000000000</ChapterTimeStart>
<ChapterFlagHidden>0</ChapterFlagHidden>
<ChapterFlagEnabled>1</ChapterFlagEnabled>
<ChapterTimeEnd>00:13:24.000000000</ChapterTimeEnd>
<ChapterDisplay>
<ChapterString>02 Interviews - crowd </ChapterString>
<ChapterLanguage>eng</ChapterLanguage>
</ChapterDisplay>
</ChapterAtom>
...etc...