How to extract AAC audio from .avi file?

[valerij]

I have Windows 98SE, and encoded many hours of VCD before.
Now I am stuck with one particluar .avi file.
Below is my problem.

From Windows Explorer, right click on .avi file >
Properties:
Media length: 22 min. 49.200 sec.
Audio format: Unknown Format, 48,000 Hz Stereo
Video format: 640 x 480, 24 Bits, 32828 Frames, 23.976
Frames/Sec, 166 KB/Sec, MS-WMV9

From Media Player Classic, File > Properties:
Video: Windows Media Video 9 640x480 23.98fps
Audio: AAC 48000Hz stereo 124Kbps
Unknown

From Media Player Classic, Right Click on playing movie, Filters:
I can see something called "CoreAAC Audio Decoder"
(http://coreaac.corecodec.org/).
Maybe I can use this somehow with VirtualDub?
---------------------------------------------------------
At first was not able even to play the file. After
downloading K-Lite Codec Pack
(http://www.codecguide.com/about_kl.htm), can now play
through Windows Media Player
or Media Player Classic (came with the pack). When
trying to make VCD out of this,
TMPGEnc does not detect audio. When trying to get
audio using VirtualDub, also gives error:
"No audio decompressor could be found to decompress
the source audio format.
(source format tag: 00ff)". Is it possible at all to
convert the above .avi file to a VCD .mpg file?
Thanks.

[celtic_druid]

Much easier way to install my coreaac compile than installing klite. Also a much smaller download. http://www.aziendeassociate.it/cd//Misc/CoreAAC-1.2.0.573.exe

You can't use dshow filters with VDub.

To extract I would suggest AVIMuxGUI. If you just want to decode, then I would use mplayer to decode directly from the avi.

Media Player Classic has a built in aac decoder by the way so it shouldn't need coreaac. In fact it shouldn't even use it unless you went and disabled the built in decoder.

[valerij]

When trying to load the previously mentioned .avi file with AVIMUX_GUI, an error occurs.
Nothing can be achieved afterwards.

AVIMUX_GUI:
Error when trying to open AVI file!
When you see this message, the AVI parser failed to open a file that looks like an AVI file. The file is probably damaged.
[OK]

Error:
Only the following file types are supported: AVI, MKV, MP3, WAV, AC3, DTS, AAC, OGG/Vorbis, SRT, SSA and valid AVI-Mux GUI - script - files
[OK]
------------------------------------------------------------------
"If you just want to decode, then I would use mplayer to decode directly from the avi." ??????????
How can I decode with a media (video, audio) player?????
------------------------------------------------------------------
Thanks in advance

[celtic_druid]

Well that is what media players do; decode.
With mplayer you use -ao pcm:file=whatever.wav
-ao specifies the audio output mode, setting it to pcm sets it to decode to a pcm wav.

You also need to add -vo null -vc dummy. This makes sure that it doesn't decode the video. If it does then the process will take the entire runtime of the video.

[valerij]

What can I say celtic_druid, you rock!
"...\mplayer.exe fmp1.avi -ao pcm:file=fmp1.wav -vo null -vc dummy"
worked like a charm. Thanks.

[celtic_druid]

Works for pretty much everything to since mplayer can play just about everything.