www.makemkv.com

Thanks again, I'll experiment to see if I can tell the difference. Experimenting with different codecs, there was a ~20% total difference in file size for the resulting MP4 when using lossless vs AAC. I noticed you are using EAC3, which uses different bit rates. In researching the topic, 384 kbit/s ...

I don't have any experience with Jellyfin. I do have experience with Plex. Most of the titles in my Plex only have surround sound audio tracks and when I play them on clients that only have stereo sound, they work fine. I would expect most Jellyfin clients to be able to do the same. Your example co...

You could also use ffmpeg to merge the two files. Here's a Stack Overflow post with someone trying to do something similar with MKV files:

https://stackoverflow.com/questions/582 ... ing-ffmpeg

I've been having the same issues and realized that my audio was 5.1, but the clients were only stereo. My workflow was MakeMKV to rip, then ffmpeg to convert to MP4, serving from my NAS using Jellyfin, and using the Jellyfin Android/iOS client to watch. Using my Windows machine to rip and convert, e...