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wipp
n00b
Joined: 27 Mar 2004
Posts: 33
Location: Zurich, Switzerland
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 Posted: Fri Dec 28, 2007 11:12 pm Post subject: [HOWTO] x264 / xvid encoding - scripts |
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0. Introduction
I've made some scripts to encode videos to x264 or xvid using mencoder. I used and improved them since years now and I think they could begin to be useful (suggestions for improvements are welcome).
1. Features
- x264 / xvid encoding (more codecs can be added easily)
- Audio denoising / normalizing, encoding to ogg
- Option to split channels
- mkv output file
- Files are updated if their dependencies change like using make
2. Usage
In the silmplest case the following command will do the job:
The result will be video.mkv.
Here are additional options:
| Code: |
./encode [ -o <out> ] [ -t <target> ] [ --2c ] [ --denoise3d ] [ --denoise ] [ -c <codec> ] [ --vopts <vopts> ] [ --aopts <aopts> ] <input>
Options
-o <out>
Sets the output file to <out>
-t <target>
Sets the target to <target>. Valid targets are wav, split_wav, ogg, log, avi, mp4, mkv.
The scripts performs all steps to build/uptade the specified target. The default target is mkv.
--2c
Splits the stereo sound track of the video in two mono tracks and adds them seperately to the mkv
--denoise3d
Activates mplayer's denoise3d video filter (on by default)
--denoise
Denoises the audio tracks before encoding to ogg
-c <codec>
Sets the codec to <codec>. A mplayer configuration file <codec>.prf must be present in the subdirectory [i]profiles[/i].
--vopts <vopts>
Passes additional options to mplayer for the video encoding passes.
--aopts <aopts>
Passes additional options to mplayer for demuxing the audio
<input>
The input file
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3. Scripts
The scripts have to be placed in the same directory and the prf files go to a subdirectory profiles. The following packages are necessary:
- mplayer
- vorbis-tools
- mkvtoolnix
- sox
- normalize
- gpac
For the sound denoising to work a directory noise has to be created and a sample of noise (noise.wav) has to be put in it together with a noise profile for sox (noise.prof). To get a profile for noise.wav:
| Code: |
sox noise.wav noiseprof noise.prof
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The content of the directory should look like this:
- demux_sound
- denoise
- encode
- encode_video
- mk.sh
- split_channels
- profiles
- x264.prf
- xvid.prf
- noise
- noise.prof
- noise.wav
| demux_sound: |
#!/bin/bash
while getopts ":o:m:" opt; do
case $opt in
o ) out=$OPTARG ;;
m ) opts=$OPTARG ;;
\? ) echo "usage: demux_sound [-o file] arg"
exit 1
esac
done
shift $(($OPTIND - 1))
arg=$1
out=${out:-"${arg%.*}.wav"}
mplayer $opts -vc dummy -vo null -ao pcm:fast:file=$out $arg
|
| denoise: |
#!/bin/bash
while getopts ":o:" opt; do
case $opt in
o ) out=$OPTARG ;;
\? ) echo "usage: denoise [-o file] arg"
exit 1
esac
done
shift $(($OPTIND - 1))
arg=$1
sox $arg temp.wav noisered noise/noise2.prof 0.01
mv temp.wav $arg
|
| encode: |
#!/bin/bash
eval arg=\${$#}
prefix=${arg%.*}
out="${prefix}.mkv"
prefix=${prefix##*/}
grey=""
ch=1
denoise3d=1
denoise=1
codec="x264"
source mk.sh
target=mkv
while [ ${#1} -gt 0 ] && [ ${1:0:1} == "-" ]; do
case $1 in
-o ) out=$2
shift ;;
-t ) shift
target=$1 ;;
--grey ) grey="--grey " ;;
--2c ) ch=2 ;;
--denoise3d ) shift
denoise3d=$1 ;;
--denoise ) shift
denoise=$1 ;;
-c ) shift
codec=$1 ;;
--vopts ) shift
vopts=$1 ;;
--aopts ) shift
aopts=$1 ;;
* ) echo "Syntax error in"
echo $1
echo 'Syntax: encode [ -o <out> ] [ -t <target> ] [ --2c ] [ --denoise3d ] [ --denoise ] [ -c <codec> ] [ --vopts <vopts> ] [ --aopts <aopts> ] [ -y <shift> ] <input>'
exit 1 ;;
esac
shift
done
prefix=${out%.*}
arg_files="$arg"
wav_files="${prefix}.wav"
split_wav_files="${prefix}_l.wav ${prefix}_r.wav"
log_files="${prefix}.log"
mp4_files="${prefix}.mp4"
mkv_files="${prefix}.mkv"
arg_deps=""
wav_deps="arg"
split_wav_deps="wav"
log_deps="arg"
avi_deps="log"
mp4_deps="avi"
if [ $ch -eq 2 ] ; then
ogg_files="${prefix}_l.ogg ${prefix}_r.ogg"
ogg_deps="split_wav"
else
ogg_files="${prefix}.ogg"
ogg_deps="wav"
fi
case $codec in
xvid )
avi_files="${prefix}_xvid.avi"
mkv_deps="avi ogg" ;;
x264 )
avi_files="${prefix}.264"
mkv_deps="mp4 ogg" ;;
esac
log () { ./encode_video ${codec} ${grey}--dn3d $denoise3d -m "$vopts" $1 ; }
avi () { ./encode_video ${codec} --pass 2 ${grey}--dn3d $denoise3d -m "$vopts" -o ${avi_files} $arg ; }
wav ()
{
./demux_sound -m "$aopts" -o ${wav_files} $1 &&
if [ $denoise -eq 1 ] ; then ./denoise ${wav_files}; fi &&
normalize ${wav_files}
}
split_wav () { ./split_channels $1 ; }
ogg () { oggenc $@ ; }
mp4 () { MP4Box -add $1 ${mp4_files} ; }
mkv () { mkvmerge -o "${mkv_files}" $@ ; }
mk $target
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| encode_video: |
#!/bin/bash
eval arg=\${$#}
pass=1
dn3d=0
codec=$1
profile=""
shift
while [ ${#1} -gt 0 ] && [ ${1:0:1} == "-" ]; do
case $1 in
--pass ) shift
pass=$1
shift ;;
--grey ) profile=",${codec}_g"
shift ;;
-o ) shift
out=$1
shift ;;
-m ) shift
options=$1
shift ;;
--dn3d ) shift
dn3d=$1
shift ;;
* ) echo "Wrong syntax in:"
echo $1
echo "Syntax: encode_video [ --pass=n ] [ --grey ] [ -o out ] [ -m opts ] [ --dn3d ] avifile.avi"
exit 1 ;;
esac
done
if [ $dn3d -eq 1 ]; then
vf=${options#*-vf }
if [ "$vf" != "$options" ]; then # $options contains "-vf"
options1=${options%-vf*}
options2=${vf#* }
vf=${vf%% *},denoise3d
options="$options1 $options2 -vf $vf"
else
options="$options -vf denoise3d"
fi
fi
prefix=${arg%.*}
out=${out:-"${prefix}.264"}
log="-passlogfile ${prefix}.log"
if [ $pass -eq 1 ]; then
out="/dev/null"
fi
mencoder -include profiles/${codec}.prf -profile ${codec}_${pass}${profile} $arg $options ${log} -o $out
|
| mk.sh: |
#!/bin/bash
mk () {
while [ -n "$1" ]; do
deps="${1}_deps"
mk ${!deps}
deps="${1}_deps"
files="${1}_files"
update=0
dep_files=""
for i in ${!files} ; do
for j in ${!deps} ; do
dep_files_id=${j}_files
dep_files="$dep_files ${!dep_files_id}"
done
if ! [ -e $i ] ; then update=1; break; fi
for k in ${dep_files} ; do
if [ $k -nt $i ] ; then update=1 ; fi
done
done
if [ $update -eq 1 ] ; then $1 $dep_files; fi
shift
done
}
|
| split_channels: |
#!/bin/bash
arg=$1
arg="${arg%.*}"
arg_l="${arg}_l.wav"
arg_r="${arg}_r.wav"
mplayer -vc dummy -vo null -ao pcm:file=$arg_l -af channels=1 $1
mplayer -vc dummy -vo null -ao pcm:file=$arg_r -af channels=1:1:1:0 $1
|
| x264.prf: |
[x264]
profile-desc="x264 encoding"
nosound=yes
ovc=x264=yes
of=rawvideo=yes
x264encopts=subq=7:partitions=all:8x8dct=yes:frameref=5:me=umh:bframes=3:b_pyramid=yes:weight_b=yes:chroma_me=1:qp=26
[x264_1]
profile-desc="x264 encoding - 1st pass"
profile=x264
x264encopts=pass=1
[x264_2]
profile-desc="x264 encoding - 2nd pass"
profile=x264
x264encopts=pass=2:bitrate=800
|
| xvid.prf: |
[xvid]
profile-desc="xvid encoding"
nosound=yes
ovc=xvid=yes
xvidencopts=gmc=1:qpel=1:me_quality=6:vhq=4:chroma_opt=yes:chroma_me=yes
[xvid_1]
profile-desc="xvid - 1st pass"
profile=xvid
xvidencopts=pass=1
[xvid_2]
profile-desc="xvid - 2nd pass"
profile=xvid
xvidencopts=pass=2:bitrate=1100
[xvid_g]
profile-desc="xvid - greyscale"
xvidencopts=chroma_opt=no:chroma_me=no:greyscale=yes
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4. Short description
mk.sh
The function mk() recursively builds or updates its targets. Each target tgt consists of a function with the same name (tgt()), a variable tgt_deps containing the names of other targets tgt depends on, separated by spaces and a variable tgt_files containing the names of files which will be built by the function tgt().
encode
This is the main script providing the rules to build the target (mkv by default). Usage is given above.
encode_video
Encodes the video.
| Code: |
encode_video [ --pass=<n> ] [ --grey ] [ -o <out> ] [ -m <opts> ] [ --dn3d ] <input>
Options
--pass=<n>
Sets first pass (<n>=1) or second (<n>=2)
--grey
Enables greyscale encoding (only for xvid)
-o <out>
Sets the output file to <out>
-m <opts>
Passes the additional options <opts> to mplayer
--dn3d
Activates mplayer's denoise3d video filter (on by default)
<input>
The input file
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demux_sound
Demuxes the sound to a wav file
denoise
Uses sox to denoise the wav
split_channels
Splits a stereo sound track track.wav in two mono sound tracks track_l.wav and track_r.wav
5. Remarks
Please let me know what you think. All sorts of feedback are welcome! |
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