Well that's why I thought you must have specified `-codec copy`. If you force ffmpeg to not re-encode the video, and also cut the video, it will perform that impossible action as best it can.
But I legitimately don't know why that would happen otherwise. Usually it defaults to re-encoding when I use it.
It's been a couple of years at least, so it isn't fresh. I don't remember anything about dealing with codecs. Anyway, it seems from all the links that using some re-encoding option will fix it. Thanks again!
But I legitimately don't know why that would happen otherwise. Usually it defaults to re-encoding when I use it.