/usr/bin/lavtc.sh is in mjpegtools 1:1.9.0-0.5ubuntu7.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
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#
# lav2tc.bash - use transcode to convert MJPEG avi files to another
# video/audio format.
#
# copyright 2003 Shawn Sulma <mjpeg@athos.cx>
#
# 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 2 of the License, or
# (at your option) 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, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#
# Description:
#
# This is intended to be a fairly intelligent wrapper for the transcode
# utility when working with mjpeg files and the lav tools. It assumes
# that you have transcode and the lavtools installed and available in the
# $PATH.
#
# Transcode can be found at:
# http://www.theorie.physik.uni-goettingen.de/~ostreich/transcode/
#
# It is written for bash specifically. It _should_ be fairly portable with
# only minor changes to other important shells such as zsh and ksh. It is
# not particularly compatible with the rather minimal sh implementation
# found in some Linux distros. I don't know much about [t]csh, but doubt
# it's easily portable to that.
#
# I'm sure there are a few naive things left in this script. Constructive
# feedback is welcome.
#
# It doesn't do much checking for existence of codecs, or allow passing of
# arbitrary parameters to transcode (including codec-specific ones).
# However I think it does manage to cover most of the common ground. It
# does some simple range checking on many of the parameters.
#
# A useful feature is the ability to specify "--two-pass". For most DIVX
# codecs (and some others), two pass encoding gives better overall results.
# This script manages the two pass process. It generates a log file name
# for the first pass based on the output name. When the first pass is done,
# it generates an md5sum of the log. This allows the second pass to be
# interrupted. When the script is run on the same output file again, it
# checks the md5sum of the log. If it's valid, it assumes that the first
# pass is already successfully done and restarts only the second pass. Yes,
# this can still break, but it's saved me much effort in converting.
#
# Transcode comes bundled with some plugins that are useful. In particular,
# ivtc and smartdeinter. These do inverse telecine and deinterlacing (based
# on SmartDub's deinterlacer which is rather nice). However, I've found
# that yuvkineco and yuvdenoise sometimes (often) do a better job of inverse
# telecine or deinterlacing. While there is support for some of the
# yuv4mpeg utilities in transcode as plugin filters, I've added here some
# additional capabilities that basically use yuvdenoise, yuvcorrect or
# yuvkineco as "pre-processors" for transcode. Hiding the ugliness of this
# from someone who just wants a nice conversion is a good thing. Of course,
# if you want to do something more complicated, please do, but this is
# intended to handle only modestly complex usage.
#
# As an additional "feature", this script automates the creation of an ogg
# media file from the transcoded file. Ogg is a media container format,
# much like AVI. Most people know ogg from Ogg Vorbis, which is a very good
# lossy audio codec. The container format, though also accepts video
# streams. Specifying "--ogg" on the command line will generate a separate
# ogg audio file (since most avi-aware codecs in transcode cannot handle ogg
# Vorbis). After processing is complete, the script uses the 'ogmmerge'
# utility to combine the video and audio streams together into a single ogg
# file. ogmmerge is not part of the ogg development download. You can get
# it here: http://www.bunkus.org/videotools/ogmtools/
#
# Determining the correct video and audio bandwith to use is a bit annoying
# at times. This script attempts to help with this by having some bandwidth
# estimation capabilities. "--max-length" allows you to specify the maximum
# MiB to be used by the final output file. The script will figure out the
# appropriate video bandwidth. It also does some automatic calculation of
# audio bandwidths (essentially for mp3 56kbps for mono and 128kbps for
# stereo, and for vorbis/ogg, 48 and 96 respectively (Vorbis gives similar
# quality at those rates)). If you specify the video and/or audio bitrates
# with -b and -a, those values are used, and not any calculated ones. Smart
# users can do better than the calculation, but not too often.
#
# The default output codec is "xvidcvs". This is the most up-to-date
# xvid/divx encoder. If you do not have the necessary xvid libs around, you
# can specify another video code with "--videocodec". Other typical values
# might be "odivx", "ffmpeg" or "xvid".
#
# I am partial to xvid. You can find it here: http://www.xvid.org/
#
# Currently the script will process only one input file. If you have
# multiple, you should create a edit list for them, and provide that edit
# list to the script as the input file.
#
# Most of the script is sanity-checking. Or comments. Or logging.
#
# Example usage:
#
# simple case:
# lav2tc.bash -o out.avi -b 1000 -a 128 in.eli
# use lots of defaults, no clipping, or resize or deinterlace, just use
# 1000kbps for video and 128kbps for audio)
#
# something more complicated:
# lav2tc.bash -o out.avi --two-pass --max-length 700 in.eli
# mostly use defaults, but do two-pass encoding, and determine the bitrates
# necessary to fit the resulting output.avi onto an 80 min CDR )
#
# lav2tc.bash --clip 20,20,10,10 --scale 0.75 -o out.avi -b 1000 in.eli
# clip 20 pixels from the top and left and 10 from the bottom and right,
# then scale the result by 75%.
#
# lav2tc.bash --pulldown=kineco -o out.avi --ogg --luma 75 --chroma 75 in.eli
# uses yuvkineco to perform inverse telecine, adjusts the luma and chroma
# contrasts, and creates an ogg media file as output. The final output is
# written to "out.ogm".
#
# Dependencies (script checks the availability of each as needed):
# (always) getopt, which, dc, cut, tr, expr, lavinfo, transcode
# (for two-pass automation) md5sum
# (for yuvdenoise deinterlace) yuvdenoise, yuvcorrect
# (for yuvkineco inverse telecine) yuvkineco, yuvcorrect
# (for "--ogg") ogmmerge
#
# History:
# This script replaces the lav2divx utility
# 2003-06-01: Initial version (Shawn Sulma)
#
appName=`basename ${0}`
appVersion="0.1"
#
# Helpers. These might some day belong in an include script file themself.
#
assertExists ()
{
[ -x `which ${1}` ] || log_fail ${1} not found. ${2}${2+ requires this.}
}
assertNumber ()
{
if [[ `expr "${1}" : "[0-9${3}]*" 2> /dev/null` -ne ${#1} ]] ; then
log_error "${2}${2+:} \"${1}\" is not a valid value"
exit 1;
fi
}
assertRange ()
{
assertNumber ${1} ${3}
if [[ ${1} -lt 0 || ${1} -gt ${2} ]] ; then
log_error "${3}${3+:} \"${1}\" outside allowed range 0-${2}"
exit 1 ;
fi
}
#
# parse a string into multiple parts separated by any of "xX,._+:-". This is useful
# for geometry strings: "000x000+000+000". It ignores the separators. The result is
# stored in the array ${geometry}
#
parseGeometry ()
{
geometry=(`echo "${1}" | tr ' xX,._+:-' ' '`)
}
#
# logging mechanism. It handles different levels of output. Yes, it's not
# too efficient, but this is a wrapper script, and performance of this script
# is not required to be stellar.
#
debug=3
info=2
warn=1
error=0
logLevelText=( "**ERROR" "## WARN" "== INFO" "--DEBUG" )
log_debug () { __log ${debug} $* ; }
log_info () { __log ${info} $* ; }
log_warn () { __log ${warn} $* ; }
log_error () { __log ${error} $* ; }
log_fail () { __log ${error} $* ; exit 1 ; }
__log ()
{
if [[ ${logLevel=2} -ge ${1} ]] ; then
level=${1}
shift
echo "${logLevelText[${level}]}: [${appName}] $*" >&2
fi
}
#
# Usage and Help display
#
usage ()
{
cat << EOF
${appName} ${appVersion} - a transcode wrapper script for lavtools
Usage: ${appName} -o <output file> [options] <input file>
For help: ${appName} -h
EOF
}
helptext ()
{
usage
cat << EOF
Options:
-h | --help this help output
-o | --output=<file> output to <file>
-b | --videorate=<n> use <n> kilobits/second as the video bitrate
-a | --audiorate=<n> use <n> kilobits/second as the audio bitrate
-m | --mono convert the audio to mono before encoding
-v | --verbose=<n> select verbosity level (0-3, higher outputs more)
--maxlength=<n> calculate video bandwidth for output size <n> MiB
--two-pass perform two-pass encoding where possible
--clip=<t>,<l>,<b>,<r> clip number of pixels from top, left, bottom, right
--frame=<w>x<h>+<x>+<y> use the specified frame geometry (clip to)
--resize=<w>,<h> resize to specified width and height
--scale=<scale> scale by the factor <scale> (1.00 = 100%)
--deinterlace[=<type>] set deinterlace/inverse telecine type
(type is "smart", "denoise", "kineco" or "ivtc")
--line-switch swap lines prior to processing
--luma=<contrast> set luma contrast
--chroma=<contrast> set chroma contrast (saturation)
--frames=<from>-<to> only process frames <from> through <to>
--frames=<number> only process first <number> frames
--status-delay=<frames> update status line every <frames> frames
--videocodec=<codec> use the specified codec (xvid, ffmpeg, etc)
--grayscale convert to black and white
--quality=<n> use quality level <n> (1-5, default 5)
--crispness=<n> use crispness <n> (default 100)
--ogg generate an ogg media file (use Vorbis not MP3)
--norm={n,p} declare norm to be "n" or "p" (passed to preprocess)
EOF
}
parseParams ()
{
args=`getopt -n ${appName} -o o:b:a:mv:hV -l output:,videorate:,audiorate:,mono,verbose:,max-length:,two-pass,ogg,clip:,frame:,scale:,deinterlacer::,pulldown::,deinterlace::,line-switch,luma:,chroma:,frames:,status-delay:,grayscale,videocodec:,crispness:,quality:,resize:,scale:,help,norm:,greyscale,version,norm: -- "$@"`
if [ $? != 0 ] ; then
log_fail "Cannot continue."
fi
eval set -- "$args"
while true ; do
case "${1}" in
-h|--help) helptext >&2 ; exit 0;;
-o|--output) output="${2}" ; shift 2 ;;
-b|--video-rate)
assertNumber ${2} "video bandwidth"
videoBW="${2}" ;
shift 2 ;;
-a|--audio-rate)
assertNumber ${2} "audio bandwidth" ;
audioBW="${2}" ;
shift 2 ;;
-m|--mono) audioOutChannels=1 ; shift ;;
-v|--verbose)
assertRange ${2} 3 "verbosity level" ;
logLevel=${2} ;
shift 2 ;;
--max-length)
assertNumber ${2} "maximum output size" ;
maxlength="${2}" ;
shift 2 ;;
--two-pass)
assertExists md5sum "${1}" ;
twopass=1 ;
shift ;;
--ogg)
assertExists ogmmerge "${1}" ;
ogg=1 ;
shift ;;
--clip) clip="${2}" ; shift 2 ;;
--frame) frame="${2}" ; shift 2 ;;
--line-switch) flip=1 ; shift ;;
--resize) resize="${2}" ; shift 2 ;;
--scale)
videoScale="${2}" ;
assertNumber ${2} "video scaling factor" . ;
shift 2 ;;
--deinterlace*|--pulldown)
case "${2}" in
denoise|kineco)
assertExists yuv${2} "${1} ${2}"
deinterlacer="${2}" ;;
smart|ivtc)
deinterlacer="${2}" ;;
"") deinterlacer="smart" ;;
*) log_fail "Unknown deinterlacer type: ${2}" ;;
esac ; shift 2 ;;
--luma)
assertNumber ${2} "luma contrast" ;
assertExists yuvdenoise "${1}"
lumaContrast="${2}" ;
shift 2 ;;
--chroma)
assertNumber ${2} "chroma contrast" ;
assertExists yuvdenoise "${1}"
chromaContrast="${2}" ;
shift 2 ;;
--frames) frameRange="${2}" ; shift 2 ;;
--status-delay)
assertNumber ${2} "status display delay" ;
delay="${2}" ;
shift 2 ;;
--grayscale|--greyscale) grayscale="1" ; shift ;;
--videocodec) videoOutCodec="${2}" ; shift 2 ;;
--quality)
assertNumber ${2} "quality" ;
quality="${2}" ;
shift 2 ;;
--crispness)
assertNumber ${2} "crispness" ;
crispness="${2}" ;
shift 2 ;;
--norm) norm="${2}" ; shift 2 ;;
-V|--version) usage ; exit 0 ;;
--) shift ; break ;;
*) log_fail "Internal error at ${1}" ;;
esac
done
# transcode can only handle one file input. This script will eventually
# handle more, but for now...
inFile="${1}"
if [[ -z ${output} ]] ; then
log_error "output file required"
usage
exit 1;
elif [[ -z ${inFile} ]] ; then
log_error "one input file required"
usage
exit 1;
elif [ ! -e ${inFile} ] ; then
log_fail "input file ${inFile} does not exist"
fi
}
#
# read information about the input file. There's probably a better way to
# do this, but this works well enough.
#
readHeader ()
{
header="`lavinfo ${norm++}${norm} ${inFile}`"
for line in ${header} ; do
value=`echo ${line} | cut -d '=' -f2`
case "${line}" in
video_width*) videoWidth=${value} ;;
video_height*) videoHeight=${value} ;;
video_fps*) videoFrameRate=${value} ;;
video_inter*) videoIsInterlaced=${value} ;;
video_frames*) totalFrames=${value} ;;
audio_bits*) audioInBits=${value} ;;
audio_chans*) audioInChannels=${value} ;;
audio_rate*) audioInRate=${value} ;;
num_video_files*) numVideoFiles=${value} ;;
esac
done
videoSeconds=`dc -e "0 k ${totalFrames} ${videoFrameRate} / p"`
}
#
# For kineco and yuvdenoise deinterlace, a fifo is required. Ensure one
# exists, and clean up when we're done with it.
#
ensureFifo ()
{
fifo="${outputBaseName}.fifo"
if [ -p ${fifo} ] ; then
log_debug "Fifo already established"
elif [ -e ${fifo} ] ; then
log_fail "${fifo} is not a FIFO. Cannot continue." ;
else
log_debug "Creating fifo ${fifo}"
log_debug mkfifo ${fifo}
mkfifo ${fifo}
needToCleanupFifo=1
fi
}
cleanupFifo ()
{
if [ -p ${fifo} ] ; then
log_debug "removing fifo ${fifo}"
log_debug rm ${fifo}
rm ${fifo}
fi
}
#
# If we're not using a pre-processing pipe, we can perform line switching
# through a filter plugin.
#
setFlipArgs ()
{
if [[ ${flip=0} = 1 && ${videoIsInterlaced} = 1 ]] ; then
flipArgs="-J fields=flip"
fi
}
#
# Set up for handling the different types of deinterlacers and inverse telecine
# filters. Some require separate filter entries, while others need pre-
# processing pipelines. The latte introduces complications because now the
# audio has to be passed to transcode separately.
#
setDeinterlaceArgs ()
{
# set up for deinterlacing. In some cases, the actual deinterlacing
# is finally triggered elsewhere.
#
# get the audio and video from the input file (default case)
#
inputFile="${inFile}"
inputVideoCodec="lav"
if [[ ${videoIsInterlaced} == 0 || ${deinterlacer=none} == "none" ]] ; then
deinterlacerText="No deinterlacing"
setFlipArgs
elif [ ${deinterlacer} = "smart" ] ; then
deinterlacerText="SmartDub deinterlacer"
deinterlaceArgs="-J smartdeinter=cubic=1:diffmode=2:highq=1"
setFlipArgs
elif [ ${deinterlacer} = "ivtc" ] ; then
deinterlacerText="Transcode ivtc inverse telecine"
deinterlaceArgs="-J ivtc,32detect=force_mode=5,decimate"
setFlipArgs
else
ensureFifo
#
# We have to turn off auto-probing. Thus we have to provide
# information about the video and audio input ourselves.
#
cineRate=`dc -e "6 k 24000 1001 / p"`
deinterlaceArgs="-H 0 -f ${cineRate},1 -M 0 -g ${videoWidth}x${videoHeight} -e ${audioInRate},${audioInBits},${audioInChannels}"
#
# get the video from the fifo and the audio from the input
#
inputFile="${fifo} -p ${inFile}"
inputVideoCodec="yuv4mpeg"
inputAudioCodec=",lav"
if [ ${deinterlacer} = "denoise" ] ; then
# in theory, the builtin yuvdenoise filter plugin should
# be able to do this. In practise, I could not find a
# practical way to tell it to _only_ deinterlace.
deinterlacerText="yuvdenoise deinterlacer"
elif [ ${deinterlacer} = "kineco" ] ; then
#
# yuvkineco 1 pass inverse telecine
#
deinterlacerText="yuvkineco inverse telecine"
# since the incoming stream is now at a different frame rate, we need
# to recalculate the number of frames that can be seen and used by transcode
totalFrames=`dc -e "8 k ${cineRate} ${videoFramesRate} / ${totalFrames} * 0 k 1 + 1 / p"`
else
log_fail "Unknown deinterlacer/pulldown: ${deinterlacer}"
fi
fi
}
setAudioArgs ()
{
#
# if there's no audio, don't bother with it.
#
if [[ ${audioInChannels} -gt 0 ]] ; then
#
# keep the same bitrate and sample size
#
audioOutBits=${audioInBits}
audioOutRate=${audioInRate}
if [[ -z ${audioOutChannels} ]] ; then
audioOutChannels=${audioInChannels}
fi
#
# If the output bitrate isn't set, determine it.
#
if [[ -z ${audioBW} ]] ; then
if [[ -n ${ogg} ]] ; then
# Ogg Vorbis compresses better
let audioBW="48*${audioOutChannels}"
else
if [ ${audioOutChannels} = 1 ] ; then
audioBW=56
else
let audioBW="64*${audioOutChannels}"
fi
fi
fi
audioArgs="-E ${audioOutRate},${audioOutBits},${audioOutChannels} -b ${audioBW}"
if [[ -n ${ogg} ]] ; then
oggName="${outputBaseName}.audio.ogg"
fi
fi
}
setVideoBW ()
{
if [[ -n ${maxlength} ]] ; then
#
# if not set, guess an appropriate bandwidth.
# This is, in some ways, a voodoo calculation. Well, to be
# precise, I'm guessing at the additional 6 bytes of overhead
# per frame. In practise, I've found this calculation is
# actually quite useful; conservative without being too much so.
#
let availableBytes="${maxlength}*1024*1024"
# bandwidth calculation
let bytesIndex="${totalFrames}*8"
let bytesAudio="${videoSeconds}*${audioBW-0}*128"
let bytesOverhead="${totalFrames}*6"
let remainder="${availableBytes}-${bytesAudio}-${bytesIndex}-${bytesOverhead}"
bandwidth=`dc -e "${remainder} ${videoSeconds} / 128 / p"`
fi
videoBW=${videoBW-${bandwidth-1000}}
}
setClipArgs ()
{
if [[ -n ${clip} ]] ; then
parseGeometry ${clip}
clipTop=${geometry[0]}
clipLeft=${geometry[1]}
clipBottom=${geometry[2]}
clipRight=${geometry[3]}
elif [[ -n ${frame} ]] ; then
parseGeometry ${frame}
assertRange ${geometry[0]} ${videoWidth} "frame width"
assertRange ${geometry[1]} ${videoHeight} "frame height"
assertRange ${geometry[2]} ${videoWidth} "frame x offset"
assertRange ${geometry[3]} ${videoHeight} "frame y offset"
#
# convert the geometry string to clipping pixels.
#
let clipBottom=${videoHeight}-${geometry[1]}-${geometry[3]}
let clipTop=${geometry[3]}
let clipRight=${videoWidth}-${geometry[0]}-${geometry[2]}
let clipLeft=${geometry[2]}
fi
assertRange ${clipTop=0} ${videoHeight} "top clipping parameter"
assertRange ${clipBottom=0} ${videoHeight} "bottom clipping parameter"
assertRange ${clipLeft=0} ${videoWidth} "left clipping parameter"
assertRange ${clipRight=0} ${videoWidth} "right clipping paramter"
let totalClipped="${clipTop}+${clipBottom}+${clipRight}+${clipLeft}"
if [ ${totalClipped} != 0 ] ; then
clippingArgs="-j ${clipTop},${clipLeft},${clipBottom},${clipRight}"
fi
}
setResizeArgs ()
{
let clippedHeight="${videoHeight}-${clipTop}-${clipBottom}"
let clippedWidth="${videoWidth}-${clipLeft}-${clipRight}"
if [[ -n ${resize} ]] ; then
videoOutWidth=${resize%%[x./-, ]*}
videoOutHeight=${resize##*[x./-, ]}
assertNumber ${videoOutWidth} "target width"
assertNumber ${videoOutHeight} "target height"
else
assertNumber ${videoScale} "output scaling factor" .
videoScale=${videoScale-1.00}
videoOutWidth=`dc -e "0 k ${clippedWidth} ${videoScale} * 1 / p"`
videoOutHeight=`dc -e "0 k ${clippedHeight} ${videoScale} * 1 / p"`
fi
if [[ ${videoOutHeight} != ${clippedHeight} || ${videoOutWidth} != ${clippedWidth} ]] ; then
resizeArgs="-Z ${videoOutWidth}x${videoOutHeight}"
fi
}
setEnhanceArgs ()
{
[[ -n "${lumaContrast}" || -n "${chromaContrast}" ]] && enhanceArgs="-J yuvdenoise=mode=2"
[[ -n ${lumaContrast} ]] && enhanceArgs="${enhanceArgs}:luma_contrast=${lumaContrast}"
[[ -n ${chromaContrast} ]] && enhanceArgs="${enhanceArgs}:chroma_contrast=${chromaContrast}"
[[ -n ${grayscale} ]] && enhanceArgs="-K ${enhanceArgs}"
}
setFramesRangeArgs ()
{
if [[ `expr "${frameRange=0}" : "[0-9]*[^0-9][0-9]*" 2> /dev/null` -eq ${#frameRange} ]] ; then
firstFrame="${frameRange%%[.,-]**}"
lastFrame="${frameRange##*[.,-]}"
else
firstFrame=1
lastFrame=${frameRange}
assertNumber ${lastFrame} "frames to encode"
fi
if [[ -z $firstFrame ]] ; then
firstFrame=0 ;
fi
if [[ -z $lastFrame ]] ; then
lastFrame=0 ;
fi
# normalise negatives
if [ ${firstFrame} -lt 0 ] ; then
let firstFrame=${totalFrames}${firstFrame}
fi
if [ ${lastFrame} -lt 0 ] ; then
let lastFrame=${totalFrames}${lastFrame}
fi
# now check for valid ranges.
if [ ${firstFrame} = 0 -a ${lastFrame} = 0 ] ; then
firstFrame=1
lastFrame=${totalFrames}
elif [ ${lastFrame} = 0 ] ; then
lastFrame=${firstFrame}
firstFrame=1
elif [ ${firstFrame} = 0 ] ; then
firstFrame=1
fi
# upper bounds
if [ ${lastFrame} -gt ${totalFrames} ] ; then
lastFrame=${totalFrames}
fi
if [ ${firstFrame} -gt ${lastFrame} ] ; then
firstFrame=${lastFrame}
fi
# generate arg
framesRangeArgs="-c ${firstFrame}-${lastFrame}"
}
setStatusArgs ()
{
if [[ ${logLevel} -lt 2 ]] ; then
statusArgs="-q 0" ;
elif [[ ${logLevel} -eq 2 ]] ; then
statusArgs="-q 1" ;
statusOnly="1" ;
else
statusArgs="-q 1" ;
fi
if [[ ${logLevel} -gt 0 ]] ; then
delayArgs=" --print_status ${delay=1} "
fi
}
initialize ()
{
outputBaseName="${output%.*}"
readHeader
setDeinterlaceArgs
setAudioArgs
setClipArgs
setResizeArgs
setEnhanceArgs
setFramesRangeArgs
setStatusArgs
setVideoBW
videoOutCodec="${videoOutCodec-xvidcvs}"
quality="${quality-5}"
crispness="${crispness-144}"
log_info "encoding ${inFile}"
log_info "input video: ${videoWidth}x${videoHeight}"
log_info "input total length: ${totalFrames} frames (${videoSeconds} seconds)"
log_info "deinterlace type: ${deinterlacer} (input is " `if [[ ${videoIsInterlaced} == 0 ]] ; then echo -n "not " ; fi ` " interlaced)"
if [[ ${audioInChannels} == 0 ]] ; then
log_info "no audio on input"
else
log_info "input audio: ${audioInRate},${audioInBits},${audioInChannels}"
log_info "output audio: ${audioOutRate},${audioOutBits},${audioOutChannels}"
log_info "output audio bandwidth: ${audioBW}"
if [[ -n ${ogg} ]] ; then
log_info "using ogg vorbis for audio "
fi
fi
log_info "clipping: left ${clipLeft-0}, top ${clipTop-0}, right ${clipRight-0}, bottom ${clipBottom-0}"
log_info "resize scale: ${videoScale-n/a}, result ${videoOutWidth}x${videoOutHeight}"
log_info "contrast: ${lumaContrast-n/a}, saturation: ${chromaContrast-n/a}"
log_info "encoding frames: ${firstFrame} to ${lastFrame}"
log_info "video bandwidth: estimated ${bandwidth-n/a}, used ${videoBW}"
log_info "transcode video out codec: ${videoOutCodec}"
transcodeArgs="\
-i ${inputFile} \
${clippingArgs} \
${resizeArgs} \
${flipArgs} \
${deinterlaceArgs} \
${enhanceArgs}
${audioArgs} \
-Q ${quality} \
-o ${output} \
-w ${videoBW},,${crispness} \
-V -k ${framesRangeArgs} ${statusArgs} ${delayArgs}"
}
#
#
# Main section of the script. It handles the creation of the pipeline
# (if necessary) as well as the management of two pass encodings (i.e. the log
# file and running the separate passes).
#
#
for required in expr transcode dc getopt cut tr lavinfo ; do
[ -x `which ${required}` ] || log_fail "${required} not found. Cannot continue."
done
parseParams "$@"
initialize
pass=1
while [ ${pass} != 2 ] ;
do
if [[ -n ${twopass} ]] ; then
passArgs=""
if ( md5sum -c ${outputBaseName}.pass1.md5sum &> /dev/null ) then
# if [[ ${pass} = 3 ]] ; then
pass=2
inputAudioCodec=""
if [[ -n ${ogg} ]] ; then
passArgs="-m ${oggName}"
outputAudioCodec=",ogg"
else
outputAudioCodec=""
fi
log_info "Valid first pass log_file found"
else
pass=1
log_warn "First pass log_file not found or not valid"
log_debug "removing spurious first pass log_file."
log_debug "rm ${outputBaseName}.pass1.log &> /dev/null"
rm ${outputBaseName}.pass1.log &> /dev/null
passArgs=""
outputAudioCodec=",null"
inputAudioCodec=",null"
fi
passArgs="-R ${pass},${outputBaseName}.pass1.log ${passArgs}"
else
# single pass.
log_info "single pass encoding only." >&2
fi
log_info "beginning pass ${pass}" >&2
# set up pipeline if needed (using kineco or yuvdenoise deinterlacer)
if [[ ${videoIsInterlaced} = 1 && ( "${deinterlacer}" = "kineco" || "${deinterlacer}" = "denoise" ) ]] ; then
if [[ -n ${flip} ]] ; then
corrector="yuvcorrect -v 0 -T LINE_SWITCH"
else
corrector="cat"
fi
if [ ${deinterlacer} == "kineco" ] ; then
deinterlaceCmd="yuvkineco -F 1 "
else
deinterlaceCmd="yuvdenoise -I -v 0 "
fi
log_info "invoking deinterlacer/pulldown thread"
log_debug "lav2yuv ${inFile} | ${corrector} | ${deinterlaceCmd} > ${fifo} &"
lav2yuv ${inFile} | ${corrector} | ${deinterlaceCmd} > ${fifo} &
fi
if [[ "${audioInChannels}" == 0 ]] ; then
inputAudioCodec=",null"
outputAudioCodec=",null"
elif [[ ${pass} == 2 ]] ; then
inputAudioCodec=",lav"
fi
inputCodecArgs="-x ${inputVideoCodec}${inputAudioCodec}"
outputCodecArgs="-y ${videoOutCodec}${outputAudioCodec}"
#
# this is the big call
#
log_debug `for arg in /usr/local/bin/transcode ${passArgs} ${transcodeArgs} ${inputCodecArgs} ${outputCodecArgs} ; do echo -n "${arg} " ; done` " <EOL>"
/usr/local/bin/transcode \
${passArgs} \
${transcodeArgs} \
${inputCodecArgs} \
${outputCodecArgs}
errcode=$?
# errcode=0
if [ ${errcode} != 0 ] ; then
exit ${errcode}
fi
if [[ -n ${twopass} ]] ; then
if [ ${pass} = 1 ] ; then
log_debug "md5sum ${outputBaseName}.pass1.log > ${outputBaseName}.pass1.md5sum"
md5sum ${outputBaseName}.pass1.log > ${outputBaseName}.pass1.md5sum
else
log_debug "mv ${outputBaseName}.pass1.log ${outputBaseName}.pass1.log.old"
mv ${outputBaseName}.pass1.log ${outputBaseName}.pass1.log.old
fi
else
break;
fi
done
if [[ -n ${needToCleanupFifo} ]]; then
cleanupFifo ;
fi
log_debug "chmod -x ${output}"
chmod -x ${output}
if [[ -n ${ogg} && ${audioInChannels} -gt 0 ]] ; then
# need to merge the two together.
log_debug "using ogmmerge to generate ogg media file"
log_debug "ogmmerge -o ${outputBaseName}.ogm -D ${output} -A ${oggName}"
ogmmerge -o ${outputBaseName}.ogm -A ${output} -D ${oggName}
fi
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