On Sun, Jun 05, 2016 at 00:37:01 +0200, juan carlos Rebate wrote: > does not work, the -h command returns unknown, I can not use man because > I'm on windows and do not want linux > ffmpeg format mpeg -h unknown I didn't ask you to run "ffmpeg -h", I recommended $ ffmpeg -h muxer=mpeg Did you run exactly that?????