4K Video Downloader can download the “old” format of YT videos where a channel is strictly a particular language and put it in an MKV container with the resolution I select & an SRT subtitle using a VP9 codec & that’s fine. I just run it through my video converter and I’m good. The problem is when I try to download from one of the “new” multi-audio/sub channels. (Ugh!)
Ok, so now let me see if I can answer your questions:
Q1 - Yes, I mean a channel with multiple audio tracks but I can only access the English version although I know there’s a Japanese track there also.
Q2 - The subtitle is the one you get by selecting CC on the YT control panel. I can see it with IDM but it’s in TIML format. 4K gives me a SRT on the “old” channels.
Q3 - Yes, when I download I want a pre-merged file with the appropriate streams (Video, Japanese Audio & English Subtitles) preferably with an SRT sub.
I hope that made sense. I’ve tried Tartube a bit but like you said it will still be the problem I run into with 4K Downloader, I can’t get the original Japanese audio. I can go to YouTube 4k Downloader and enter the URL for the file and download the Japanese audio and remux the file but when you’re talking about >100 files that’s a long process.
Again, thank you for the information and explantion of the command line. I’m not very good with command line stuff but I will try it and see if I can get it work for me. Please feel free to comment back.