VLC HowTo/Transcode multiple videos
Revision as of 06:04, 9 June 2019 by DoesItReallyMatter (talk | contribs) (→Unix / Linux: Simplify. Extensions are not used on Linux by convention, and can be done easily after transcoding)
| This page describes how to batch transcode or encode. | Other "how to" pages |
| This page contains example code. This code is licensed under the GNU General public license |
Contents
Idea
The idea is to use VLC to do some batch work to encode or transcode multiple files one after each other, without having to care about it.
You may want to transcode all your videotheque to another format to play them on an IPod, a Zune, a PS3 or a Xbox.
Codecs / Muxers
You have to choose the correct codecs for the device you want to transcode for.
We choose here H.264 with AAC in a MPEG-2/TS muxer as an example.
GUI
Batch convert is supported via the GUI in VLC 3.0.0
If you cannot wait, download a nightly build. Otherwise, use command-line batch transcoding below.
Command Lines
Windows
For example, to transcode a batch of m4a files (potentially in multiple subdirectories of a single common root directory) to mp3 files (512kb/s encoding with 44100 sampling frequency) you could use the following code in a Windows XP command prompt:
for %%a in (*.VOB) do "C:\Program Files\VideoLAN\VLC\vlc" -I dummy -vvv %%a --sout=#transcode{vcodec=h264,vb=1024,acodec=mp4a,ab=192,channels=2,deinterlace}:standard{access=file,mux=ts,dst=%%a.mpg} vlc://quit
@ECHO OFF
REM ########################################################################
REM # A Windows XP cmd.com script to batch convert m4a files to mp3. #
REM # #
REM # Copyright (C) 2008 Andrew Boden #
REM # (boden@graduate.uwa.edu.au) #
REM # #
REM # This program is free software: you can redistribute it and/or modify #
REM # it under the terms of the GNU General Public License as published by #
REM # the Free Software Foundation, either version 3 of the License, or #
REM # (at your option) any later version. #
REM # #
REM # This program is distributed in the hope that it will be useful, #
REM # but WITHOUT ANY WARRANTY; without even the implied warranty of #
REM # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
REM # GNU General Public License for more details. #
REM # #
REM # You should have received a copy of the GNU General Public License #
REM # along with this program. If not, see <http://www.gnu.org/licenses/>.#
REM # #
REM # Version 1.0 (June 27th 2008) #
REM # Uses VideoLAN VLC 0.8.6h (www.videolan.org) #
REM # Gracefully handles commas and apostrophes in file names. #
REM # Not aware of any other characters needing graceful handling. #
REM # 512kbps encoding with 44100 sampling. #
REM ########################################################################
FOR /R %%G IN (*.m4a) DO (CALL :SUB_VLC "%%G")
FOR /R %%G IN (*.m4a.mp*) DO (CALL :SUB_RENAME "%%G")
GOTO :eof
:SUB_VLC
SET _firstbit=%1
SET _qt="
CALL SET _newnm=%%_firstbit:%_qt%=%%
SET _commanm=%_newnm:,=_COMMA_%
REM echo %_commanm%
CALL "C:\Program Files\VideoLAN\VLC\vlc" -I dummy -vvv %1 --sout=#transcode{acodec="mpga",ab="512","channels=2",samplerate="44100"}:standard{access="file",mux="mpeg1",dst="%_commanm%.mp3"} vlc://quit
GOTO :eof
:SUB_RENAME
SET _origfnm=%1
SET _endbit=%_origfnm:*.m4a=%
CALL SET _newfilenm=%%_origfnm:.m4a%_endbit%=.mp3%%
SET _newfilenm=%_newfilenm:_COMMA_=,%
COPY %1 %_newfilenm%
DEL %1
GOTO :eof
:eofThe same as above, for vlc >= 0.9:
@ECHO OFF
FOR /R %%G IN (*.m4a) DO (CALL :SUB_VLC "%%G")
FOR /R %%G IN (*.m4a.mp*) DO (CALL :SUB_RENAME "%%G")
GOTO :eof
:SUB_VLC
SET _firstbit=%1
SET _qt="
CALL SET _newnm=%%_firstbit:%_qt%=%%
SET _commanm=%_newnm:,=_COMMA_%
REM echo %_commanm%
CALL "C:\Program Files\VideoLAN\VLC\vlc" -I dummy -vvv %1 --sout=#transcode{acodec="mpga",ab="512","channels=2"}:standard{access="file",mux="raw",dst="%_commanm%.mp3"} vlc://quit
GOTO :eof
:SUB_RENAME
SET _origfnm=%1
SET _endbit=%_origfnm:*.m4a=%
CALL SET _newfilenm=%%_origfnm:.m4a%_endbit%=.mp3%%
SET _newfilenm=%_newfilenm:_COMMA_=,%
COPY %1 %_newfilenm%
DEL %1
GOTO :eof
:eofWindows 7 SendTo
This batch file allows to use the Windows SendTo context menue in Exlorer. Copy the content in a file named MOV_to_MPG_Converter.bat and copy it to your SendTo directory (CMD SHELL:sendto)
@ECHO OFF
rem ***********************************************************************
rem * MOV to MPG batch converter. (2014-09-29 Sinx) *
rem * *
rem * For installation just copy batch file to SendTo directory. *
rem * On Win8 execute "SHELL:sendto" to go to Sendto folder. *
rem * *
rem * I got quite good compression rations with these parameters: *
rem * vcodec=h264 codec used *
rem * vb=10000 video bandwidth *
rem * deinterlace=1 rebuild full pictures from keyframes and diffs. *
rem * acodec=mp3 audio codec *
rem * ab=128 128kbps mp3 quality *
rem * channels=2 stereo *
rem * *
rem * for parameters see *
rem * http://www.videolan.org/doc/vlc-user-guide/de/ch04.html *
rem ***********************************************************************
echo **********************************************************************
echo MOV to MPG VLC batch converter called: %0 %1 %2 %3 %4 %5 %6 %7 %8
echo **********************************************************************
echo.
echo For installation, just copy batch file to SendTo folder..
echo.
SET _new_extention=mpg
:start
if "%~1"=="" (call goto :the_end)
CALL :SUB_CONVERT %1
SHIFT
goto :start
:SUB_CONVERT
SET _orig_path=%~1
rem SET _orig_extention=%_orig_filename:*.=%
echo %_orig_path%
SET _orig_extention=%_orig_path:*.=%
CALL SET _new_path=%%_orig_path%:.%_orig_extention%=.%_new_extention%%%
set _new_path="%_new_path%"
echo.
echo Converting %1 ======TO===== %_new_path% ...
echo.
if exist "%ProgramFiles%\VideoLAN\VLC\vlc.exe" (
SET _vlc_path="%ProgramFiles%\VideoLAN\VLC\vlc"
) else (
SET _vlc_path="%ProgramFiles(x86)%\VideoLAN\VLC\vlc"
)
CALL %_vlc_path% -I dummy -vvv %1 --sout=#transcode{vcodec=h264,vb=10000,deinterlace=1,acodec=mp3,ab=128,channels=2,samplerate=44100}:standard{access=file,mux=ts,dst=%_new_path%} vlc://quit
GOTO :eof
:the_end
echo **********************************************************************
echo * FINISHED *
echo **********************************************************************
pausePowershell
$outputExtension = ".mp3"
$bitrate = 160
$channels = 2
foreach($inputFile in get-childitem -recurse -Filter *.wav)
{
$outputFileName = [System.IO.Path]::GetFileNameWithoutExtension($inputFile.FullName) + $outputExtension;
$outputFileName = [System.IO.Path]::Combine($inputFile.DirectoryName, $outputFileName);
$programFiles = ${env:ProgramFiles(x86)};
if($programFiles -eq $null) { $programFiles = $env:ProgramFiles; }
$processName = $programFiles + "\VideoLAN\VLC\vlc.exe"
$processArgs = "-I dummy -vvv `"$($inputFile.FullName)`" --sout=#transcode{acodec=`"mp3`",ab=`"$bitrate`",`"channels=$channels`"}:standard{access=`"file`",mux=`"wav`",dst=`"$outputFileName`"} vlc://quit"
start-process $processName $processArgs -wait
}Unix / Linux
This can take one file (file.flv), or a wildcard (*.flv). Also supports path with spaces.
#!/bin/sh
vcodec="mp4v"
acodec="mp4a"
bitrate="1024"
arate="128"
mux="mp4"
# For Linux
vlc="/usr/bin/vlc"
# For OSX
#vlc="/Applications/Utilities/VLC.app/Contents/MacOS/VLC"
if [ ! -e "$vlc" ]; then
printf '%s\n' "Command '$vlc' does not exist" >&2
exit 1
fi
for filename in "$@"; do
printf '%s\n' "=> Transcoding '$filename'... "
"$vlc" -I dummy -q "$filename" \
--sout '#transcode{vcodec=mp4v,vb=1024,acodec=mp4a,ab=128}:standard{mux=mp4,dst="$filename.transcoded",access=file}' \
vlc://quit
ls -lh "$filename" "$filename.transcoded"
printf '\n'
doneTo convert filename extensions after (e.g. from .old to .new):
for filename in *.old; do mv "$filename" "${filename%.old}.new"; done