Here is that new script I’ve been working on. Basically
the script turns VOB’s into xvid avi’s. The script can
process in the foreground, -F, or it can hand it off to the batch command,
default.
#!/bin/sh
#
# $Id: agk20,v 1.7 2006/07/07 01:53:25 jwhyche Exp jwhyche $
#
#
# $Log: agk20,v $
# Revision 1.7 2006/07/07 01:53:25 jwhyche
# more bugs
#
# Revision 1.6 2006/07/06 23:07:43 jwhyche
# added command line help -h and fixed some bugs about something
#
# Revision 1.5 2006/07/06 22:22:07 jwhyche
# Installed the framerate override code
# -f <0-5> where 0 is native fps
#
1 is 23.976 fps
# 2
is 24 fps
# 3
is 25 fps
# 4
is 29.970 fps
# 5
is 30 fps
#
# Revision 1.4 2006/07/06 21:35:47 jwhyche
# added default file sizing code
#
# Revision 1.3 2006/07/04 01:12:38 jwhyche
# Added aggressive demuxing using tcdecode. Solves problem with some VOBs
# and audio sync. Using mplayer to get video length
#
# Revision 1.2 2006/07/02 00:30:32 jwhyche
# Inital version of agk20 to replace the ageing 1.x scripts. This version
# moves more of the processing into the main script and out of the subscript.
# While this slows the execution of the main script down some what,
# it makes the matanance of the code much easier. Functionally this
# script is exactly the same as the original.
#
# Revision 1.1 2006/06/30 22:23:32 jwhyche
# Initial revision
#
#
# function script_write()
#
# function writes input parameters to temporary script to be
# handed off to batch command or optionally excuted in the
# foreground.
function script_write() {
echo $1
>> $$.sh
}
# function show_help()
# function shows help options
function show_help() {
echo
"agk20 [options] [files....]
-s <size> set the output file size of the avi
(default output size is 10MB per minute of video)
-b <bitrate> sets the mp3 bitrate to use for audio (default: 128)
-F execute encoding in the Foreground instead of submitting it
to the batch queue.
-a <track> audio track to use for avi (default: 0)
-A passes auto through untouched. Use for including orginal
5.1 sound track to avi
-M <mode> Sets the demuxer mode for transcode. Uses the same
settings that transcode uses except takes 5 as a parameter
to
use tcdemux to build a nav map. (default: 2)
-f <0-5> where 0 is native fps
1 is 23.976 fps
2 is 24 fps
3 is 25 fps
4 is 29.970 fps
5 is 30 fps
"
}
# function ts ()
#
# convert seconds to hours / minutes /seconds
function ts () {
seconds=$1
hours=$((seconds / 3600))
seconds=$((seconds % 3600))
minutes=$((seconds / 60))
seconds=$((seconds % 60))
echo "$hours hour(s) $minutes minute(s) $seconds second(s)"
}
# Parse command line options and set flags
#
# -s <size> set the output file size of the avi
# (default output size is 10MB per minute of video)
# -b <bitrate> sets the mp3 bitrate to use for audio (default: 128)
# -F execute encoding in the Foreground instead of submitting it
# to the batch queue.
# -a <track> audio track to use for avi (default: 0)
# -A passes auto through untouched. Use for including orginal
# 5.1 sound track to avi
# -M <mode> Sets the demuxer mode for transcode. Uses the same
# settings that transcode uses except takes 5 as a parameter
to
# use tcdemux to build a nav map. (default: 2)
# -f <0-5> where 0 is native fps
#
1 is 23.976 fps
# 2
is 24 fps
# 3
is 25 fps
# 4
is 29.970 fps
# 5
is 30 fps
OPTSTRING="s:b:Fa:AhM:f:h"
_progress_off="--progress_off"
_filesize=0
_audio_option="-s 2.738"
_audio_bitrate=128
_ag_demux=0
_frame_over=0
if [ $# -eq 0 ]
then
echo
"agk20 -h for options and commands"
exit
fi
set -- `getopt ${OPTSTRING} $*`
while [ $1 != -- ]
do
case $1 in
-s)
_filesize=$2
shift;
shift;
;;
-F)
_batch_mode=1
_progress_off=""
shift;
;;
-A)
_audio_option="-A -N 0x2000"
shift;
;;
-a)
_audio_track=$2
shift;
shift;
;;
-b)
_audio_bitrate=$2
shift;
shift;
;;
-M)
_demuxer=$2
[
$_demuxer = 5 ] && _ag_demux=1;
shift;
shift;
;;
-f)
_frame_over=1;
_frc=$2;
shift;
shift;
;;
-h)
show_help;
exit;
;;
esac
done
shift;
#Determine output filesize in MB
((_filesize*=1024))
# for loop to begin processing files on command line
for _target in $*
do
echo ${_target}
# Create output file name from input
_outfile=`echo ${_target} | sed -e 's/.VOB$/.avi/g'`
# Use code from Phil Ehrens <[EMAIL PROTECTED]> mplayerprobe.sh
# to determine incoming VOB's resolution, frame rate, and
# Aspect Ratio.
#
# Thanks Phil
#
# run mplayer in -identify mode
foo=`mplayer -identify -frames 0 -vo null -ao
null\
${_target}
2> /dev/null | grep ID_VIDEO`
eval "$foo";
# Parsing Parsing Parsing
geometry=${ID_VIDEO_WIDTH}x${ID_VIDEO_HEIGHT};
asr=0;
framerate=$ID_VIDEO_FPS;
index=0;
[ $framerate = 23.976 ] &&
index=1;
[ $framerate = 25 ]
&& index=3;
[ $framerate = 29.970 ] &&
index=4;
# Use bc to calculate asr
asr=`bc -l << _EOF
define asr(w,h) {
if (w/h >= 2.0) return (4);
if (w/h >= 1.6) return (3);
if (w/h >= 0.0) return (2);
}
asr($ID_VIDEO_WIDTH,$ID_VIDEO_HEIGHT)
_EOF
`
_framerate="-f ${framerate},${index}";
#frame rate code
if [ ${_frame_over} -eq 1 ]
then
[
$_frc = 0 ] && _framerate=;
[
$_frc = 1 ] && _framerate="-f 23,976,1";
[
$_frc = 2 ] && _framerate="-f 24,2";
[
$_frc = 3 ] && _framerate="-f 25,3";
[
$_frc = 4 ] && _framerate="-f 29.970,4";
[
$_frc = 5 ] && _framerate="-f 30,4";
fi
# Use mplayer to probe VOB to get video length
and store it
audio_foo=`mplayer -identify -frames 0 -vo null
-ao null\
${_target}
2> /dev/null | grep ID_LENGTH`
eval "$audio_foo";
_length=${ID_LENGTH};
# Create default file size if -s is not
specified
[ ${_filesize} -eq 0 ] &&
((_filesize=((${ID_LENGTH}/60) * 10) * 1024 ))
# Get audio bit rate for AC3 audio
if [ "${_audio_option}" == "-A -N
0x2000" ]
then
_audio_bitrate=`
tcextract -i ${_target} -t vob -x ac3 -a
${_audio_track:-0}|\
tcscan -x ac3 | head -1 | awk
'{print $8}'`
fi
# Get the bitrate for the correct filesize using bc
# ({S}ize - ({A}udio x {L}ength)) / {L}enght = {V}ideo Bitrate
# {S} Size of output file in KM
# {A} Audio bitrate in KB/s (note 224 kbits/s = 224 / 8 = 28 KB/s)
# {L} Lenght of Video Clip in Seconds
# {V} Video bitrate in KB/s, to get kbit/s multiply 8
vid_bitrate=`bc <<EOF
((${_filesize}-((${_audio_bitrate}/8)*${_length}))/${_length})*8
EOF
`
# Lay down option -M 5 and nav.log using
tcdemux
if [ ${_ag_demux} -eq 1 ]
then
_demuxer=2;
script_write
"tcdemux -i ${_target} -W > ${_target}.log"
_nav_option="-H
10 --psu_mode --nav_seek ${_target}.log --no_split"
fi
# First
Pass
script_write "transcode -a
${_audio_track:-0} \
-x
vob \
-i
${_target} \
-w
${vid_bitrate},50 \
-b
${_audio_bitrate:-128},0,0 \
${_audio_option}
--a52_drc_off \
-g
${geometry} \
${_framerate}\
-M
${_demuxer:-2} -R 1,$$.log \
-y
xvid4,null \
-o
/dev/null \
--nice 2 ${_nav_option} \
-J 32detect=force_mode=3 --print_status 20
${_progress_off} &&"
# --import_asr
${asr} \
# --import_asr
${asr} \
# Second
Pass
script_write "transcode -a
${_audio_track:-0} \
-x
vob \
-i
${_target} \
-w
${vid_bitrate},50 \
-b
${_audio_bitrate:-128},0,0 \
${_audio_option}
--a52_drc_off \
-g
${geometry} \
${_framerate}\
-M ${_demuxer:-2} -R 2,$$.log \
-y
xvid4, \
-o
${_outfile} \
--nice 2 ${_nav_option} \
-J
32detect=force_mode=3 --print_status 20 ${_progress_off}"
# Fix 6 Channel Surround Sound in AVI
files with it
if [ ${_audio_bitrate} -eq 448 ]
then
script_write
"avifix -i ${_outfile} -e 48000,16,6 -a ${_audio_track:-0}"
fi
mv $$.sh ${_target}.sh
# Excute in the forground or submit it to batch command
if [ ! ${_batch_mode} ]
then
echo
${_target} >> batch.log
batch
-f ${_target}.sh >> batch.log 2>&1
else
/bin/sh
${_target}.sh
fi
done
