#!/bin/bash

X264="subq=6:4x4mv:8x8dct:frameref=3:me=3:weight_b:b_pyramid:bframes=3:mixed_refs:b_pyramid:brdo:bime:trellis=2:qcomp=1"
VB=$2

[ "$#" -lt 2 ] && exec echo "usage: $0 <file> <bitrate> [outfile]"

clean_tmp(){
	[ -z "$KEEPTEMP" ] && rm -f /tmp/*$$*
	exit 0
}
OUTFILE="${1%.*}.mp4"
[ "$#" -gt 2 ] && OUTFILE="$3"

trap clean_tmp SIGINT
trap clean_tmp SIGQUIT
trap clean_tmp SIGKILL

FPS=$(mplayer -frames 0 "$1" -vc null -vo null -nosound -identify 2>/dev/null |awk -F= '/ID_VIDEO_FPS/{print$2}')
#CROP=$(mplayer "$1" -vo null -ac null -fps 100 -vf cropdetect -ss 100 -frames 250 2>/dev/null |grep '[CROP]' |tail -n 1 |cut -d '(' -f 2 | cut -d ')' -f 1)

echo -e "\e[32mRipping Audio...\e[39;49m"
mplayer "$1" -vo null -vc null -ao pcm:fast:file=/tmp/audio.$$.wav -af lavcresample=44100 -msglevel all=0:avsync=5 || clean_tmp
normalize-audio --peak /tmp/audio.$$.wav || clean_tmp
mplayer /tmp/audio.$$.wav -ao pcm:fast:file=/tmp/audio2.$$.wav || clean_tmp
mv /tmp/audio2.$$.wav /tmp/audio.$$.wav

echo -e "\e[32mEncoding Audio...\e[39;49m"
neroaacenc -hev2 -q 0.15 -if /tmp/audio.$$.wav -of /tmp/audio.$$.mp4 || clean_tmp
MP4Box -raw 1 /tmp/audio.$$.mp4
mv /tmp/audio.$$_track1.aac /tmp/audio.$$.aac

echo -e "\e[32mEncoding Video (1° pass)\e[39;49m"
mencoder "$1" -o /dev/null -of rawvideo -ovc x264 -nosound $CROP -x264encopts $X264:bitrate=$VB:turbo=1:pass=1 -passlogfile /tmp/mkmp4pass.$$.log -msglevel all=0:avsync=5 || clean_tmp
echo -e "\e[32mEncoding Video (2° pass)\e[39;49m"
mencoder "$1" -o /tmp/video.$$.264 -of rawvideo -ovc x264 -nosound $CROP -x264encopts $X264:bitrate=$VB:pass=2 -passlogfile /tmp/mkmp4pass.$$.log -msglevel all=0:avsync=5 || clean_tmp

echo -e "\e[32mPutting all together\e[39;49m"
MP4Box -fps $FPS -sbrx -new -add /tmp/audio.$$.264 -add /tmp/video.$$.aac "$OUTFILE" || clean_tmp

echo -e "Saved to \e[32m$OUTFILE\e[39;49m"
clean_tmp