[SOLVED] m4v Video Clips during playback

[Nachteule]

I already made some tests with RPi2/RPi3 playing HEVC/h.265 videos.

RPi2 (not overclocked) is not able to play 720p smoothly, sometimes it stucks. Don't ask me how 1080p are going
RPi3 (not overclocked) is playing this 720p smoothly, no 1080p tested, but I suppose it does not

Usually when I convert videos, I'm using Handbrake or XMedia Recode. Both using ffmpeg internally, so the command IriDium told should do the same job.