[access-uk] how to extract the soundtrack from a digiTV recording
- From: "Stephen Green" <stephen.tina@xxxxxxxxxxxx>
- To: <access-uk@xxxxxxxxxxxxx>
- Date: Wed, 6 Feb 2008 20:51:17 -0000
Hi Pele and Carol
Here’s how to demultiplex DigiTV recordings to strip away the normal soundtrack
and the audio description soundtrack.
First, open DigiTV as normal – you may want to mute the sound by pressing the M
key so that you can hear the prompts with Jaws or other screen reader.
Go into the file menu and down cursor four times to the tools item and press
enter.
Right cursor twice to get onto the demultiplex tab.
Tab four times until you hear browse after the input file prompt. Press the
spacebar to get to a normal windows open dialog box.
Press shift+tab to get into the file list of your recordings. Cursor down until
you hear the name of the file you want to demultiplex. Now tab four times until
you land on the open button and press the spacebar. You should hear jaws
counting up towards 100%.
Now, here’s where things get interesting.
You are suddenly thrown back to the main DigiTV screen and wonder where the
heck the demultiplex page has gone. However, don’t worry this is a bug in the
software and all that has happened is that jaws has lost focus on the page. To
return it to the focus, just press alt+tab and the windows will swap around and
you’re back in the demultiplex dialog box.
Now press tab until you land on the start demux button. Pres the spacebar and
you will hear jaws reporting the percentage that DigiTV has demultiplexed the
file. This may take one or two minutes depending on the size of the file.
However the count never actually reaches 100%, it always appears to end at 99%.
Now tab ten times until you land on the exit button and press spacebar and you
will get back to the main DigiTV screen.
Close down DigiTV.
Now open your recordings folder and you will find that there are 3 new files,
these will be the name of your recording plus 00c0.mp2, 00c1.mp2 and 00e0.m2v.
The file ending in 00c0.mp2 is the normal soundtrack, the file ending in
00c1.mp2 is the audio description soundtrack.
As I said, you can play the mp2 files in win amp or you can convert them in
CDEX to mp3’s.
I have been told by Nebula that you can use gold wave to merge the 00c0 and the
000c1 files to give you a complete audio described sound track, but it won’t
create the dip in main soundtrack that’s normal when the voice over speaks and
consequently it may be slightly difficult to hear distinctly when for example
music is being played in the background of the main soundtrack. I haven't tried
this myself as I don’t have gold wave and sound forge needs an expensive plug
in to work with mp2 files.
If you have any trouble with this procedure, just drop me a line and I’ll try
and sort you out.
Good luck
Steve Green
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