mencoder -sub SUBTITLES.srt -subcp iso-8859-7  -ovc lavc -oac lavc  -lavcopts vcodec=mpeg4 acodec=libmp3lame -o VIDEO.MPEG4.avi VIDEO.avi
mencoder -sub SUBTITLES.srt -subcp iso-8859-7  -ovc lavc -oac lavc  -lavcopts vcodec=mpeg1 -o VIDEO.MPEG1.avi VIDEO.avi

mencoder -ovc help
mencoder -oac help

Rip mp3 from avi

mencoder -ovc frameno -oac mp3lame -of rawaudio -o FILENAME.mp3 FILENAME.avi

convert mp3 to wav

for i in *.mp3; do mpg321 -w "`basename "$i" .mp3`.wav" "$i"; done

mkisofs -J -R -o audio01.iso *wav

wodim -v -pad speed=1 dev=/dev/sr0 -dao -swab *.wav

convert ogg to avi

mencoder out.ogv -o out.avi -ovc lavc -oac lavc

resize video file

mencoder file.avi -vf scale=640:400 -ovc lavc -lavcopts vcodec=mpeg4 -o file_640x400.avi

convert m4a to mp3

ffmpeg -i filename.m4a filename.mp3
 
for i in `ls -1 --color=no *.m4a`; do ffmpeg -i $i $i.mp3 && rm -f $i ; done

http://pvdm.xs4all.nl/wiki/ind[..]_to_MP4_using_ffmpeg
http://www.catswhocode.com/blo[..]mmands-for-all-needs

ffmpeg -formats
ffmpeg -codecs

Convert wmv to avi (raw)

mencoder clip1.wmv -oac pcm -ovc raw -o tmp1.avi

join avi files

mencoder -oac copy -ovc copy intro.avi gamos.avi -o video.avi

ffmpeg -i VIDEO.flv -s 480x320 -vcodec mpeg4 -acodec libmp3lame -ar 16000 -r 13 -ab 32000 -aspect 3:2 VIDEO.mp4

ffmpeg -i VIDEO.flv -s 480x320 -vcodec mpeg4 -ab 128 -acodec aac VIDEO.mp4

mencoder Ldap_Attribute.ogv -ovc lavc -oac mp3lame -o Ldap_Attribute.avi

remove audio from a video file (avi)

ffmpeg -i input.avi -c copy -an output.avi

Using -an to remove audio

Convert bitrate

ffmpeg -i audio_file.mp3 -ab 192k newaudiofile.mp3