cannot see or extract audio from AVI

[Srivas]

Hello.
I have some captured AVI files and they play back fine in WMP, but when I open them in Vegas 10 for or in Audition CS5.5 for editing then there's no audio. I also tried SUPER converter to extract the audio, but it comes out shrunken, like 20 minutes shorter high pitch audio file. I guess it could be stretched out in Audition and pitched back to normal, but that's a headache. Is there some other way to get the audio track?

[manono]

What kind of audio is it? Use GSpot or MediaInfo if you don't know. If AVI, you can usually demux it using VDub(Mod). AoA Audio Extractor can most likely decode it as WAV audio.

[Srivas]

Hi Manono,
thanks for the reply, I tried AoA and it really extracted fast, but same problem remains. Video is 1:02 but extracted audio is 0:41 minutes. Here are my audio settings from Super, maybe it helps.

[jman98]

You'll probably need to find a guide as the way you do this is not very intuitive (in my opinion), but Virtual Dub can demux AVI files and it's free. You might try that. When I've demuxed an AVI file and found the audio and video to be of very different lengths I've just repeated the demuxing another time or time and eventually it comes out right.

[manono]

The picture provided shows them both to be the same length, so that's from the source file? If so, I don't know why you'd have trouble extracting that, but then I've never really worked with DV files. Next, as jman98 also suggested, I'd try VDub.

[Gavino]

I suspect that your extracted audio actually has a 32kHz sample rate instead of 48KHz.
That's consistent with it playing at a higher pitch and lasting 2/3 of the original time (41 minutes instead of 62).

I have had similar DV files in the past because of capture problems.
Usually demuxing the audio in VirtualDub fixes it, or if you don't actually want to separate the audio, save to a new file in VirtualDub using Direct Stream Copy for both video and audio.

[Srivas]

VirtualDub Rocks! It did the job as required. Thank You all for the input, problem solved.