You could try this mkv to avi converter. It is an online service. The file upload limit is 150MB, but you can use it for free and as many times as you want.


You can try here, it says it does , but I have not tried it Online-Convert to MP4 and the main site can convert alot of files audio, video, images, etc Online-Convert


timidity + FFmpeg for MP3 output And for MP3 conversion you can put it together with timidity + ffmpeg: sudo apt install timidity ffmpeg timidity MIDI_sample.mid -Ow -o - | ffmpeg -y -f wav -i - MIDI_sample.mp3 FluidSynth + FFmpeg fluidsynth -a alsa -T raw -F - /usr/share/sounds/sf2/FluidR3_GM.sf2 MIDI_sample.mid | ffmpeg -f s32le -i - MIDI_sample.mp3 ...

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