https://mpv.io/
mpv is a free (as in freedom) media player for the command line. It supports a wide variety of media file formats, audio and video codecs, and subtitle types.

https://github.com/staxrip/staxrip
StaxRip is a powerful video/audio encoding GUI for Windows.
It executes and controls console apps such as x265, mkvmerge, ffmpeg, etc. and uses scripting based frame servers, AviSynth+ and VapourSynth, for video processing. Each project can also be extended by various events and settings.