virtualdubmod audio conversion help

[rh71]

I have VOB files from a DVD but it contains 6ch audio as opposed to the 2ch I'm used to converting (without problems). The issue is... when I go to Stream List and select MP3 for compression, none of the audio formats are listed (like 48kb/22000hz, etc.). I hit Show All Formats and it will show them, but the conversion will fail: "Error initializing audio stream compression: the requested conversion is not possible".

How do I use virtualdubmod (to convert a dvd file to xvid) when the audio has 6 channels ? Is this what demux is for ? I'm afraid of having to splice audio back into video.

As a secondary question - I tried to use DVD2AVI and it shows 7 tracks for audio - which one would be the one I want - I figure whichever comes out as center. I'd like to keep it to just 1 tool so if I can do it via virtualdubmod, that would be best. Thx.

[feenix]

Install the AC3 ACM decompressor codec (see tools) and try VirtualDubMod again.

[rh71]

unfortunately, that's a no-go. I already had the AC3 decompressor according to the stream list and even after uninstalling what I had and installing from the download link here, it still comes up with the same error. There's no listed format unless I hit Show All. After I select one from that list, it errors with the same message.

[mats.hogberg]

You should keep the audio as is (5.1 audio in an AVI is always cool, even if it takes some space!) Just reencode the video.

/Mats

[rh71]

You should keep the audio as is (5.1 audio in an AVI is always cool, even if it takes some space!) Just reencode the video.

/Mats

I'm doing this for use on a Palm (Treo) so it needs to be as small as possible. I got a 43min tv episode (from DVD filesize 1.7GB) to 28MB and it's good quality. I think less than 5% of that file is audio. I must compress audio to mono at the very least... especially for Palm.

[mats.hogberg]

Jeesh! 5.1 ac3 is out of the question then! You could try ripping the audio with DVD2AVI to 2 chan wav then encode to mp3 with CDEx?

/Mats

[feenix]

Should work OK? The only thing I can suggest is that you've picked up a DTS audio and not AC3 audio file?

If you are using DVD2AVI then why not decode the audio to 2 channel wav (an option in the Audio menu) instead of demuxing the AC3 (pick audio channel 1 if you're not sure - it's nearly always the one you want). You can just feed the wav into VDubMod as the audio stream.