| Graphedit=20
Graphedit is part of the Microsoft Media SDK and =
basically=20
let's you use every filter that Media Player and software DVD =
players use=20
to play movie and audio files. The package you can download on =
this site=20
includes a better MPEG-2 splitter, and all the other necessary =
filters to=20
encode the audio of a DVD to a Dolby Surround file, either in =
uncompressed=20
PCM WAV or MP3 format using Lame.
Unpack the zip file and run register.bat in =
order to=20
register all the filters.
First I'll describe how to get the audio =
directly from the=20
VOB. Later on you'll be able to read what to do if =
you already=20
have an ac3 file you whish to decode.
Start up Graphedit, then press File - Render =
Media File=20
and select one of your VOB files. If you get an error here that =
means you=20
don't have a software DVD player installed, and I truly hope you =
won't=20
have this problem. Not having a software DVD player is VERY VERY =
bad, you=20
can't even test if the ripped VOBs are valid, so make sure you get =
one=20
right away, then try it again. Then delete the whole video part of =
the=20
graph, basically everything that comes after the MPEG-2 Splitter, =
that is=20
the Video Filter and all the overlay stuff. Now press play and =
check if=20
you get the right audio track. If not delete the MPEG-2 splitter, =
and=20
press Graph - Insert Filters, click on Direct Show Filters and add =
the=20
Ligos MPEG splitter. Insert that at the position of the MPEG-2 =
splitter=20
you just deleted. Then connect one of the AC3 output pins to the =
audio=20
decoder and press play again.
![](3D"Graphedit)
You can connect the audio decoder to any AC3 =
output of the=20
Ligos splitter and listen to every output until you've find the =
right=20
stream. Then delete everything right of the audio decoder and =
attach a few=20
other filters:
You also have to replace the VOB file you've loaded by =
the=20
I-Media Multiple MPEG2 Source filter, and during loading of the =
filter=20
you'll be asked for an input file. That file must be a streamlist=20
containing all your VOB files. The last element of this graph is =
the Dump=20
filter.
After having connected it like that (or having the Ligos MPEG =
Splitter=20
in the place of the MPEG-2 splitter) press the play button.
But we have yet another possibility: Instead of =
using WAV=20
Dest we can use the Lame Direct Show filter and encode to MP3 =
directly,=20
even to VBR MP3 if we wish to do so. The DS filter is based on =
Lame 3.88.=20
In order to get VOB -> MP3 create a graph like that:
Right click on the LAME filter to get to it's properties:
Make sure you have the right sampling rate (the =
Intevideo filter=20
can't downsample audio but if you have an 48KHz incapable =
soundcard you=20
shoudl first upgrade that before getting your first DVD disc =
anyways).
Moving the encoding quality slider to the left will improve =
quality at=20
the expense of speed. You can choose VBR if you like, just make =
sure you=20
mux with the special VirtualDub version which is capable of muxing =
VBR MP3=20
files (actually all are capable but there's only one where the =
result will=20
be synch).
Once you're done press the play button.
One of the advantages of using the I-media filter as =
source is=20
also that you get these nice stats and you can be sure to know =
when the=20
program has crashed.
Once you're done you're ready for multiplexing. Should you not =
use the=20
special version of VirtualDub made to work with VBR MP3 files then =
be=20
aware that using VBR MP3s will result in asynch that you can't =
possibly=20
fix.
>> BACK
If you already have an AC3 =
file the=20
procedure is a bit different: After you have got the right ac3 =
file start=20
up Graphedit. Press File - Open:
Make =
sure you=20
select All Files in the File Type selection. Then select the ac3 =
file=20
you've just stripped from the VOBs.
After that=20
if you have installed all filters, you should get something like =
that=20
graph:
If you press the play button you should hear the =
audio=20
file playing. Now press Graph - Insert Filters:
Go to =
DirectShow=20
Filters. Insert the following Filters: Wav Dest and Dump. If those =
two=20
don't show up you didn't register it. Go back to the start to see =
how to=20
register the DirectShow filters provided. When you insert the dump =
filter=20
you're being asked to provide a media filename. Enter whatever =
name you=20
want but the extension has to be .wav .
After that you have to delete the Default =
DirectSound Device=20
and to reconnect the filters. You can connect two filters by =
clicking on=20
the Output rectangle of a filter (on the right side), keep =
pressing the=20
mouse button and draw a line to the input of the next filter (on =
the left=20
side). Here's how it looks:
Connect the filters in the following order: =
XingDVD Audio=20
Decoder to WAV Dest, WAV Dest to Dump. In the end it should look =
like=20
this:
Now you =
just have=20
to click on the play button and after some time the ac3 will be =
decoded to=20
wav. To set the options of the Audio decoder, right click on the =
XingDVD=20
Audio Decoder, and chose properties. You can select your sampling =
rate,=20
for instance you can downsample to 44.1khz if you need =
it.
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