Divx to DVD with 5.1 sound?

[ashsharma]

As the subject says, is it possible to convert a divx file to dvd and give it 5.1 sound (it has ac3 sound source). What tools would be used, is it easy to do and does it give good results?

[babiulep]

Is the AC3 sound source 5.1 ?
Then you can simpy demux it with VirtualDubMod.

If it's only 2 channels, where would you get 'the other 3' from...?

[ashsharma]

OK, maybe I asked a dumb question, but did you really need to point out my idiocy using your first-ever post on the forum?!

[ashsharma]

I'll ask a different question instead then:

I'm trying to convert a divx film to dvd. It's all going well with the video coding but I want to increase the volume of the audio. It's AC3 and I'll be using virtualdub mod or to extract it. Any ideas?

[babiulep]

He, I'm sorry, was only kidding...

You may have to convert it to a .wav first and then normalize it.. and then encode it again as ac3. But all this re-coding might reduce quality...

[ashsharma]

haha, don't apologise I thought it was a bit dumb as I was typing it out!

So you don't know of a way to increase the volume using virtualdub mod or maybe tmpgenc dvd author?

[bugster]

haha, don't apologise I thought it was a bit dumb as I was typing it out!

So you don't know of a way to increase the volume using virtualdub mod or maybe tmpgenc dvd author?

No, AFAIK, there is no way to adjust the volume of an AC3 without re-encoding it, so its pretty much what what babiulep said, except you would have to extract it 6 seperate wavs using something like Headac3he. Then after cahnging volume, re-encode to AC3 with a proffesioanl level encoder that will accept 6 seperate wavs as input.


Probably not worth the effort

[mats.hogberg]

As AC3 is compressed, the audio has to be decompressed before it can be altered in any way. (Like you can't edit a Word document in a zip without unpacking it first.) For a stereo/2 chan AC3, it's no problem - it can be converted to stereo wav, edited and reencoded back to 2 chan ac3 no prob, but for 6 chan ac3 (5.1) it's much more of a problem...

/Mats