#!/bin/bash
# 
# ravi, drg

BITRATE=250
SUBOPTIONS="-subcp cp1250 -subfont-text-scale 3 -font /usr/share/fonts/default/Type1/arial.ttf"
VIDEOCODEC="-ovc lavc -lavcopts vcodec=mpeg4:vhq:vqmin=2:vqmax=20:vmax_b_frames=2:vbitrate=$BITRATE:vqcomp=0.6"
#VIDEOCODEC="-ovc xvid -xvidencopts bitrate=$BITRATE:me_quality=4:vhq=0:pass=1"
AUDIOCODEC="-oac mp3lame -lameopts mode=1:cbr:br=48"

if [ -z "$3" ]; then
	echo -e "\nUsage: $0 <file_in> <file_out> <width> [subtitles]\n"
	exit
fi

if [ -z "$4" ]; then
	substring="-sub $4 $SUBOPTIONS"
else
	substring=""
fi

# JEERONIMOOOOOO!
fileinfo=`mplayer -identify $1 -frames 0 -ao null -vo null| egrep "ID_VIDEO_WIDTH|ID_VIDEO_HEIGHT"`
height=`echo $fileinfo|xargs -n1|grep HEIGHT|awk -F= '{print $2}'`
width=`echo $fileinfo|xargs -n1|grep WIDTH|awk -F= '{print $2}'`
proportion=`echo $width/$height | bc -l`
nw=$3
nh=`echo "($nw*$height)/$width" | bc`

echo $width:$height ->  $nw:$nh

mencoder -sub "$4" $SUBOPTIONS $AUDIOCODEC $VIDEOCODEC -vf scale="$nw:$nh" -xy $nw  "$1" -o "$2"
echo -e "\n\n\noutput:"
ls -lah "$2" && file "$2"