#!/bin/sh -ex

mencoder -mc 0 -noskip -oac pcm -ovc copy -o "$1".avi "$1"
mplayer -noframedrop -ao pcm:fast:file="$1".wav -novideo "$1".avi
sox "$1".wav -c 2 -r 48000 -e signed-integer -b 16 "$1".wav.wav
mv "$1".wav.wav "$1".wav
normalize --peak "$1".wav
opusenc "$1".wav "$1".opus
rm "$1".wav
opts="mbd=2:trell:dia=6:predia=6:cmp=6:subcmp=6:preme=2:vb_strategy=2:v4mv:cbp:mv0:qns=2"
opts="mbd=2:trell:dia=6:predia=6:cmp=6:subcmp=6:preme=2:vb_strategy=2:v4mv"
for vpass in 1 2; do
    mencoder \
        -mc 0 -noskip \
        -nosound \
        -passlogfile "$1".log \
        -ovc lavc \
        -lavcopts vcodec=libvpx:$opts:autoaspect:vpass=$vpass \
        -vf scale=960:540 \
        -o "$1".vp8 "$1".avi
done
mkvmerge --webm -o "$1".webm "$1".opus "$1".vp8
rm "$1".opus "$1".vp8 "$1".log "$1".avi