Errors Extracting AC3 from .avi file

[exabyte]

Hi,
I am not sure what to do here, I have an AVI file that GSpot tells me has AC3 audio , bitrate 448.
When I use VirtualDubMod 1.5.10 to extract the audio file , I get an error:
WARNING : Nothing to output BFRAME DECODER LAG.
I have searched for a solution but I have had no luck.
I have tried earlier versions of Virtualdubmod, with the same result.

Can you please assist ?,
What am I doing wrong?

Thank you for you assistance.

[Baldrick]

when do you get the error? have you tried demux it under streams->stream lists. ignore what it says in the preview window.

or try extract the ac3 with avimuxgui instead.

[manono]

Hi-

What am I doing wrong?

Nothing. It always says that when B-Frames have been used in the video. It has nothing to do with the audio. Just do what Baldrick said and you'll get the audio demuxed OK.

[exabyte]

Hi,
I open VirtualDubMod , go to file, open video file , I then get the Bframe msg.
I then go to streams , streams list ,and there is a file there(audio).
I then click demux, enter a file name (same as AVI file name) and save.
But nothing happens, there is no progress indication, I left it a while , but still no joy.
I reinstalled VirtualDubMod , but the same result.
I downloaded avimuxgui and tried but I could not get to the web page to give me instrauction on how the software operates.
I right clicked , added the source file but the out put is either MKV or AVI, not AC3.
CAn you help??
Thanks

[celtic_druid]

It isn't an error and it doesn't happen always with bframes. Only when packed bistream is not used.
Also I believe in recent versions of XviD the message was ditched and replaced with just a black frame.

With AVIMuxGUI, you need to right click on the stream and then select demux.

[exabyte]

Hi,

Thanks Guys, I followed your advice and my problem is solved.
I used avimuxgui to extract the audio and my video now works.

Thanks a stack

Exabyte