===== Convert MP4 to OGV with ffmpeg =====
Found this [[https://superuser.com/questions/1096841/how-do-i-convert-mp4-to-ogv-while-still-retaining-the-same-quality-using-ffmpeg#1096865|here]]:

  ffmpeg -i input.mp4 -c:v libtheora -q:v 7 -c:a libvorbis -q:a 4 output.ogv