AC3 Audio Problems!

[Lifeforce]

I have been trying to convert this DivX AVI using Ulead MovieFactory and unfortunately UMF doesn't seem to recognize the audio stream. Open viewing the file properties the video codec is recognized as:

DivX MPEG-4 Low-Motion
24 Bits, 640 x 352
165,870 Frame(s)

The audio, however, comes up as:

Unknown ACM Format
48.000 kHz, 0 Bits, Stereo
332,069,085 Samples

Any ideas as to how I can go about converting this clip w/ the compressed audio intact? I've tried using VDUB but IT too does not recognize the audio in order to conver it. Any help would be greatly appreciated.

Thanks!

[banjazzer]

Did you bother to look at the guides below the forums....?

[Lifeforce]

Yes, I did. I managed to get Virtual Dub to extract the audio stream and had it almost up and running using HeadAC3he. However, during the conversion, HAC3 reported that the stream was corrupt. Needless to say, I am now back to the drawing board.

[banjazzer]

I don't really know what to suggest, as it sounds that your audio stream has a problem. You could try Graphedit. I converted an ac3 stream once when I had similar problems with HeadAC3he. However, it takes a bit of getting used to.

I would suggest looking at the guide to converting ogg/ogm, as that uses Graphedit. When you have got a bit familiar with it, you might like to try converting your ac3. These are some brief notes I made, which won't mean a lot to you until you have a play with Graphedit:

CTRL+R and browse to the avi. Delete boxes leaving:

input.avi>avi splitter>ac3 from avi xform>intervideo audio decoder>morgan stream switcher

Insert the following Direct Show filters: wav dest and filewriter (specifying a name and directory for the output wav). Join these to the existing graph. Then *play the graph*.

Hopefully this will extract the wav for you. But it will still be 48,000Hz. So, get a copy of ssrc and copy the ssrc.exe to the same directory as the wav. Open a DOS box, change to the directory with the wav and type "ssrc --rate 44100 input.wav output.wav" substituting the appropriate wav names. Good luck. 8)