Someone

input=$1
output=$2
temp=$1.temp


# Video encoding passes
mencoder "$input" -o "$temp" -oac copy -ovc lavc -srate 11025 -channels 1 -af-adv force=1 -lavcopts vcodec=mpeg4:vbitrate=496:vpass=1 -vf harddup

#mencoder "$input" -o "$temp" -oac copy -ovc lavc -srate 11025 -channels 1 -af-adv force=1 -lavcopts vcodec=mpeg4:mbd=2:trell:vbitrate=496:vpass=2 -vf harddup
mencoder "$input" -o "$temp" -oac copy -ovc lavc -srate 11025 -channels 1 -af-adv force=1 -lavcopts vcodec=mpeg4:vbitrate=496:vpass=2 -vf harddup

# Dump audio (as audiodump.wav)
# mplayer -vo null -ao pcm "$input"

rm audiodump.wav
rm audiodump.mp3

ffmpeg -i "$input" -vn -acodec pcm_u8 -ar 11025 -ac 2 audiodump.wav

# Encode audio with LAME
lame -h -V 4 -r -s 22050 --bitwidth 8 -m mono audiodump.wav audiodump.mp3

# Remux audio
mencoder "$temp" -audiofile audiodump.mp3 -oac copy -ovc copy -o "$output"