#!/bin/bash
#
# recode and burn subtitles for iphone/ipod-touch 
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# (C) 2008 Jose L. Hidalgo Valiño (pplux@pplux.com)
#

[ -f "$1" ] || { echo "File $1, not found"; exit 1; }

OUTPUT="i_${1%%${1##*.}}mp4"
SUBS_FILE="${1%%${1##*.}}srt"
SUBS_OPTS=""
[ -f $SUBS_FILE ] && SUBS_OPTS="-subfont-autoscale 1 -sub $SUBS_FILE" && echo "Subtitles found..."

# Create a temp file
TEMP=$(mktemp)

# first pass, rescale and include subtitles
mencoder -vf scale=480:-3 -ovc lavc -oac copy $SUBS_OPTS -o $TEMP "$1"

# encode using mpeg4
FFMPEG_VIDEO_OPTS="-vcodec libx264 -b 128k -level 30 -mbd 2 -cmp 2 -subcmp 2 -g 300 -qmin 20 -qmax 31 -flags +loop -chroma 1 -partitions partp8x8+partb8x8 -flags2 +mixed_refs -me_method 8 -subq 7 -trellis 2 -refs 1 -coder 0 -me_range 16 -bf 0 -sc_threshold 40 -keyint_min 25 -maxrate 3584k -bufsize 8192k"
FFMPEG_AUDIO_OPTS="-acodec libfaac -ac 2 -ar 44100 -ab 0 -aq 120 -alang ENG -async 1 "
ffmpeg -i $TEMP -y $FFMPEG_VIDEO_OPTS $FFMPEG_AUDIO_OPTS "${OUTPUT}"

# remove temp file
rm $TEMP

echo "->$OUTPUT<- done!"