Problems with 5-channel AC3 audio ripping from avi file

[Lanthanide]

Hello

I'm having a lot of trouble trying to rip an AC3 audio track from an avi file. I've done 3 other movies in the past three days and had no trouble, but no programs seem to want to work on this one.

This is what MediaInfo 0.4.0.1 has to say about the audio stream:

Audio #0
Codec : AC3
Bit rate : Bps
Channels : 5
Sampling rate : 48 KHz
Bitrate : 448000

I'm not sure if the "Bps" is supposed to be blank like that or not.

Anyway, I can play the movie fine using windows media player and videolancentre or whatever it is. I have the AC3 filter codec thingy installed.

I've tried using virtualdub 1.5.10 to rip it to WAV but it says "No audio decompressor could be found to decompress the source audio format".

I tried doing it in BeSweet, and had a little success - it does seem to rip the sound, however the output is all garbled and distorted.

I had a look at GordionKnot at the suggestions of some people, but that doesn't seem to be what I'm after at all (that seems to rip DVDs to mpeg movies, I want to rip the sound from an AVI).

TMPEnc can't read the audio stream either. I can happily extract video-only (and have done so, as I needed to anyway) but if I try and extract audio separately or together, it complains about it being an unsupported format.


So does anyone have any ideas as to what I can do? Obviously whoever made the avi in the first place could encode to this format, so unless they did something really funky, it should therefore be possible to decode from it (and I can hear the movie fine in windows media player!?). It seems to me that I probably need a plugin, if so, what and where from?

[jimmalenko]

Try virtualdubmod. Open your file, then go to streams > stream list, and click the demux button.

[Lanthanide]

Well it worked better, but there seems to be a lot of hissing and 'snow' in the background that isn't there when I play the movie in media player.

Just for the record, I also tried ffmpegGUI 3 and got this error:

ffmpeg version 0.4.9-pre1, build 4723, Copyright (c) 2000-2004 Fabrice Bellard
built on Oct 20 2004 18:37:34, gcc: 3.2.3 (mingw special 20030504-1)
Input #0, avi, from '***':
Duration: 01:03:51.5, bitrate: 1531 kb/s
Stream #0.0: Video: mpeg4, 640x272, 25.00 fps
Stream #0.1: Audio: 0x2000, 48000 Hz, 5 channels, 448 kb/s
Output #0, ac3, to '****':
Stream #0.0: Audio: ac3, 48000 Hz, stereo, 384 kb/s
Stream mapping:
Stream #0.1 -> #0.0
Unsupported codec (id=11) for input stream #0.1


Edit: Boy do I feel like a nong. I had my speakers up way loud (for some reason) so I was, of course, getting a lot of background snow/noise being picked up.

So to cut it short - your suggestion worked, thanks a lot. Now my next problem is that I need to make the file much louder, it's very quiet (guess that's what I had my speakers up so much), so I need to convert it to a wav file.



Edit 2: Right, BeSweet managed to convert it to a WAV fine. Weird that it could read the individual .ac3 file, but it couldn't read it properly when it was in the .avi.

So basically we can all just let this thread sink into oblivion.

[yoda313]

Hello,

Edit 2: Right, BeSweet managed to convert it to a WAV fine. Weird that it could read the individual .ac3 file, but it couldn't read it properly when it was in the .avi.

AVI is not a format that besweet can read. It reads vobs, mp3, mp2, wav, ac3, dts (dts with a plugin). I think it does some specialized ones like ogg vorbis or something I don't deal with at all.... But NO avi....

Kevin