Depending on your hardware strength and what media you're converting, the handbrake suggestion might be best. But I'm coming in to say that does take a lot of compute power. You mentioned watching cams, so if it's popular TV/movie data you're compressing, it's often quicker to just download a different, lower resolution source from torrent.
sudoMakeUser
joined 2 weeks ago
You could almost manufacture it based on this image, granted that's a 1/4" impact bit. All it would take is one bolt being smuggled to their factory or one photograph of a spec sheet.