AAC Audio

[Dark962000]

I have a .avi with AAC audio, the audio isn't recognized by TMPGEnc, anyone know how I can make this file MPEG-2? Is it possible to extract the audio and make it wav somehow, if so how? Any other soulutions are welcome.

[teegee420]

I thought AAC audio couldn't exist in an avi container. Hmm. Maybe I was misinformed. Try installing 3ivx and see if running it through TMPGEnc works. To strip the audio to wav check out my post here.

[au7usa]

I'm with teegee420, i didn't think that would work. Is is possible someone has renamed a MP4 to AVI?

3ivX filters can handle the decoding of AAC within a compatible format. To properly parse AAC (on its own) through DirectShow you'll need AAC Parser filter as well.

AAC Parser filter
http://www.rarewares.org/files/aac/aac_parser.zip

Hey maybe you can have AVI's with AAC audio. This is from the version history of AVI-Mux GUI v1.16.5:

"Warning: Older versions of AVI-Mux GUI will NOT read AVIs with AAC writting by this or later versions! "

AVI with AAC audio seems to be a new development:
http://www.hydrogenaudio.org/index.php?showtopic=15232&st=0&

[au7usa]

Does the file play with Windows Media Player? (do you have AAC decoder installed)

Well it looks like VirtualDub (none of them) will support AVI with AAC audio. AVIMux GUI will support creating such a file, but i don't think you can use it to demux the audio stream.

It might be possible to use AVIMux GUI to remux the entire file into a MKV from AVI. You could then use VirtualDubMod to open the MKV and demux the AAC audio.

A second option would be to install Matroska Pack and try to open the MKV with TMPGEnc using "Open / All files".

Are you on WinXP / Win2k or Win98? I've heard a couple of problems using Matroska pack with Win98 that i plan on investigating later.

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OK, just tried it myself. VirtualDubMod won't open the MKV. VirtualDubMod locked up! AVIMux GUI took a non-standard AVI and made a non-standard MKV. This from a working file! If your familiar at all with GraphEdit you'll see what i mean.

VirtualDubMod doesn't use directshow filters for parsing, it has it's own built-in parser. The file still plays on my system (MKV), so i tried to open in TMPGEnc directly.

Success!

The moral of this story; you must decode AVI with AAC audio through DirectShow. I havn't tried but i suspect AviSynth would work just fine.

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This just occured to me; you might try disabling AVI support in the VFAPI tab and opening the AVI directly. Should load AVI through DirectShow.

It works!