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View Full Version : Joining AC3 audio streams


WhipHubley
31st May 2004, 20:29
Hi there,

I have an .avi movie that is split into 2 parts, which I wish to join together. The audio stream is AC3.

But regardless of the methods I have used, when playing back the conjoined file I get a loud "crack" at the point of the join. The video plays perfectly smoothly, but there is a clear and loud cracking noise in the audio.

The methods I initially tried were...

appending the second file to the first file in VirtualDubMod, then saving as .avi

appending the second file to the first file in VirtualDubMod, then demuxing the AC3 stream on its own

...but both produced the cracking noise at the join.

so I then tried joining the two files using AVIMux GUI. Interestingly, AVIMux GUI barfed out when it was attempting to create the file - right at the point of the join - saying there was possible errors in the header information.

I realise that you may be thinking "well, that's the problem then you idiot" but I get the feeling that this might be quite a common problem when joining .avi files with an AC3 soundtrack. because of that, I'm hoping that someone may have the answer to solving this. That is, how to join them without getting this cracking noise.

Any help on this one would be greatly appreciated.

Thanks.

WhipHubley
1st June 2004, 13:55
FYI - here's the answer. Well, one answer...

Append the files in VirtualDubMod
DeMux the AC3 audio stream
Use BeSliced to fix the AC3 audio (just drag and drop then click "Fix File!")
Mux the new audio back into the video (I used AVI Mux GUI for this)

Sorted.