Extracting Audio with Ac3Dec

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In order to make a clean audio track for our DivX ;-) movie, we need to get the sound from the VOB files in some way. The audio on a DVD is in a format called Ac3. This format allows multichannel sound, like Dolby Digital to be incorporated with a DVD movie. Unfortunately, Ac3 is quite large, and that in it's self defeats the purpose to use it. What we will eventually do, is extract the Ac3 sound into a PCM Wave file. The reason we do this, is so that we can make it a little easier when compiling our sound into Mp3 or WMA.

Ac3Dec works well for converting Ac3 audio to PCM Wave. You can get it from my software page. Ac3Dec is a DOS program and is pretty hard to use. That is why we will be using a Windows front end for the program called DanniDinGUI. This is also on my software page. Once you have both downloaded, UNZIP Ac3Dec into some folder on you HD. LOAD DanniDin, and CLICK on the AC3DEC button at the top of the page. ( circled in red on picture )

Don’t freak out yet, I know there are a lot of buttons and gadgets, but we will not even have to worry about them. Just the ones circled in red. Now, CLICK the “A” button to select the location of Ac3Dec.

Click the X button on the bottom to exit. Next, we need to find the VOB, so CLICK the “B” button.

Lastly, we need to tell it where to save or output Wave file, so CLICK the “C” button.

Now that all the settings are chosen, we can move along to the encoding. Look at the bottom of this screen, right under the CREATE MY WAV button, and CLICK the check box “PCM WAVE”

Once you have done all of that, CLICK the CREATE MY WAV button. You will see a screen that looks like this.

Now all that you have to do is sit back and wait for it to finish. When it does, apply a little DOS command to “exit” the program, and move on to the next step.

Encoding the Video <--- Guides Home ---> Normalizing Audio

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