I have various video files as MKV, including some high-def (1080p) with FLAC audio. These can be played fine on a several-years-old PC with a mid-range graphics card (using mpv/ffmpeg), but when I tried to play them on a Kindle Fire HD8 (using VLC for Android) it caused it to choke.
How can I reencode them such that the lower-powered machine can play them? I assume this will lead to a decline in quality, but I doubt I would notice on the smaller screen anyway. I already have
ffmpeg installed and hope to just use that, but if it's easier I can install some other tool. Presumably there are multiple tradeoffs to be made here; it would be nice to have some idea of the options. (I can also post more details about the precise encoding of the files in question, if that would be useful; at the moment I don't know what would be relevant.)