[HELP] Rename tracks help please and help with chapters

[Mapsking]

Nope, I simply added some chapters manually like I wrote.
Chapter file can't cause a fix-up or missing streams.
(broken chapter file might cause problems during playback and muxing, but that's about it)

What's wrong with .mp4 files?

mp4 container is fine (not suited for most audio streams on Blu-rays but fine).

I have a lot of movies, and .mp4 seems to have a lot more universal compatibility than .mkv.

Definitely not the .mkv container allows way more stuff than the mp4 container.

Would it be better to not have VFR?

Yes! Since your source isn't vfr, I see no good reason why one would create vfr unless one does a lot of filtering on anime content and too much time. For natural content, which was properly mastered once there should be no reason to use vfr.
-> Going from cfr to vfr is normally a stupid thing.

Cu Selur

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Hmm, all of my comments seem to have disappeared when I posted them...

Basically, the gist was...

Test #1 worked fine, both audio tracks are present and tagged correctly, but it is in .mkv format, not .mp4, which is what I want.

Test #2 actually seemed to partially work correctly, it is in .mp4 format, it has both audio tracks, and both have the correct audio, tagged correctly, BUT, there is a new sound handler track in the file.  See attached screenshot.

Test #3 worked fine, both audio tracks are present and tagged correctly, but it is in .mkv format, not .mp4, which is what I want.

Test #4 seemed to work correctly, tags changed, both audio streams were present, however, the sound handler track is present once again.

Test #5 seemed to work correctly, tags changed, both audio streams were present, chapters were fine, however, the sound handler track is present once again.

The only difference is that I was using the add to queue and start button, instead of the add to queue button, followed separately by the Start Job button, and I was adding subtitles.  Not sure what changed, because none of that stuff should make any difference at all, unless it is the Stream extraction with FFMPEG option.

I added subtitles, and did the same as in test 3/4, but removed the checkbox from Config>Extraction>Stream extraction with FFMPEG, and everything seemed to work ok, EXCEPT once again, I have the same audio for both audio streams.  Why is it so hard to have an .mp4 container with multiple audio streams, without extra ones getting added it?  Why on earth does it do this???