#!/usr/bin/zsh
# x265 encoding, two pass encoding makes quality better compared to single pass
if ( [ "$1" = "-f" ] && [ "$2" = "x265" ] ) ; then
        # encode a video file
        if [ "$3" = "-i" ] ; then
                /usr/bin/ffmpeg -y -i "$4" -x265-params pass=1 -c:v libx265 -b:v 1900k -c:a libmp3lame -b:a 128k -f matroska /dev/null
                /usr/bin/ffmpeg -y -i "$4" -x265-params pass=2 -c:v libx265 -b:v 1900k -c:a libmp3lame -b:a 128k "${4:r}.mkv"
        # encode multiple *.VOB files
        else
                cat *.VOB | /usr/bin/ffmpeg -y -i - -c:v libx265 -b:v 2500k -c:a flac "{$4:r}.mkv"
        fi
# theora encoding, q:v sets the constant video quality.
elif ( [ "$1" = "-f" ] && [ "$2" = "theora" ] ) ; then
        # encode a video file
        if [ "$3" = "-i" ] ; then
                /usr/bin/ffmpeg -y -i "$4" -c:v libtheora -q:v 5 -c:a libvorbis -q:a 4 "${4:r}.mkv"
        # encode multiple *.VOB files
        else
                cat *.VOB | /usr/bin/ffmpeg -y -i - -c:v libtheora -q:v 7 -c:a flac "$(basename $(dirname $PWD)).mkv"
        fi
# output a message error if no output codec was given
elif ( [ "$1" != "-f" ] || [ "$2" != "x265" ] || [ "$2" != "theora" ] ) ; then
        echo "please specify codec and optional source."
fi