Mecoder is part of the Mplayer family and is the core of video converter software (iriverter, Winmemc, Meizu Video Converter,super,BADAK,etc)
Mencoder documentation
http://www.mplayerhq.hu/DOCS/HTML/en/index.html
Mencoder documentation single file
http://www.mplayerhq.hu/DOCS/HTML-si...n/MPlayer.html
List of all available command options
http://www.mplayerhq.hu/DOCS/man/en/mplayer.1.html
To see list of available options
mencoder -[opt] help
Video Filter options (example)
mencoder -vf help