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Extracting AAC from Matroska H264

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mizore:
K, so I've tried a number of programs (including mkvextract), and every single one extracts the AAC at half the khz that it was originally encoded.  Frustrating to say the least. 

Original encode at 48khz=24khz extract
44khz encode=22khz extract

I've Googled until I can't see straight, and I've seen this same problem posted on other forums (ie. videohelp) with no solution.

I would just try converting to wave and reencoding, but the AAC's I want are 6 channel.  Converting to a 2 channel audio track is what I'd like to avoid.

Someone can please halpz?   :-\

hilander72:
Additional info on what your trying to do would be helpful... Mediainfo is your friend. ;)

mizore:
I use Mediainfo.

...and I don't know how to further clarify that I am trying to extract an AAC from a Matroska .mkv encode?

hilander72:
By additional I meant... You're trying to extract an AAC 6ch audio, and wish to be able play it on xxx, etc..., and would prefer the file be of xxx format, etc...

mizore:
Oh, well it doesn't matter.  I will be reencoding into a Matroska container using the AAC.  Or, I can always convert to AC3... regardless, that isn't the problem. ;D  I know how to proceed after I have the audio. The only issue is proper AAC extraction.  Nothing I have tried extracts the AAC into the original format.  Every program I've tried cuts the sampling frequency in half.

Nyquist-Shannon is tormenting me.

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