> In particular I'm not sure how to really tell ffmpeg to handle multiple audio/sub streams without programmatic interaction This is what gets me every time. I

> In particular I'm not sure how to really tell ffmpeg to handle multiple audio/sub streams without programmatic interaction This is what gets me every time. I'm relatively proficient with ffmpeg (relatively!) but for the life of me I can never remember how to switch audio sub streams or drop some of them, etc. And yes, one first needs to find out what's where, but there are many UI tools that can do this (in addition to ffprobe).