Software needed for this step
of DVD conversion:
[VStrip
Demultiplexer]
[AC3DEC
Freeware Decoder]
An easy and straightforward
way of decoding an AC3 Audio
Stream is to use the free
AC3DEC decoder by Aaron
Holtzman. You feed an AC3 Stream
to this tool and it produces
a .WAV-file. Here is
the guide on how to do it:
- Download AC3DEC
and unzip in a directory.
(you may also set a path
to this directory for easy
accessibility)
- Open a command prompt
and change directory to where
your VOB-Files are lying.
- Use the VSTRIP
Tool to demultiplex the
audio stream from the VOB.
(If you copied the whole
vob-file structure to harddisk
without joining the VOBs
refer to the list-file
method)
- Use the following commandline
to demultiplex the audio stream:
vstrip vts_01_x.vob audio.ac3
! d 0xbd 0x8s
08xs is the
language you wanna strip.
0x80 is first language,
0x81 is second a.s.o.
- If you had several VOB-Files
then you can use the list-feature
of vstrip:
- Generate a listfile
movie.lst
- In each line put the
name of the next vts_01_x.vob
file
(including full path
!!!)
- Save this file to disk
- Use the following commandline
to demultiplex the audio:
vstrip
@movie.lst -!oaudio.vob
0xbe 0xbd 0x8s = 0x80
As above 08xs
is the language you want
to strip.
- After doing so (you may
have skipped the vStrip steps
if you already had only one
vob-file) you have to
decode the VOB using
AC3DEC :
ac3dec audio.ac3 -o output.wav
- AC3DEC starts do decode
now.
After this procedure you have
the decoded WAV-File sitting
on your harddisk ready for further
processing.
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