Можно дать команду:

$ mencoder -ovc help

MPlayer SVN-r31918 (C) 2000-2010 MPlayer Team

Available codecs:

copy - frame copy, without re-encoding. Doesn't work with filters.

frameno - special audio-only file for 3-pass encoding, see DOCS.

raw - uncompressed video. Use fourcc option to set format explicitly.

nuv - nuppel video

lavc - libavcodec codecs - best quality!

vfw - VfW DLLs, read DOCS/HTML/en/encoding-guide.html.

qtvideo - QuickTime DLLs, currently only SVQ1/3 are supported.

libdv - DV encoding with libdv v0.9.5

xvid - XviD encoding

x264 - H.264 encoding