SmartRipper's AC3 stream output, and AZID's problems with it.

[Smeg]

Rip using SmartRipper 2.41, use the "Stream Processing" and demux the .m2v and the .ac3 to seprate files. Then run azid in.ac3 out.wav.

azid spits out:
[00:00:00.000] W7: Downmix overflow (0: +66.0dB)
[00:00:00.005] W7: Downmix overflow (0: +66.6dB)
[00:00:00.010] W7: Downmix overflow (1: +66.0dB)
[00:00:00.016] W7: Downmix overflow (0: +66.1dB)
[00:00:00.021] W7: Downmix overflow (0: +60.2dB)
[00:00:00.026] W7: Downmix overflow (0: +66.1dB)
[00:00:00.032] W7: Downmix overflow (0: +66.0dB)
for the first couple of lines then continues properly, and the resulting .wav has 00.038 seconds of garbage. I would just cut this out, but it happens every chapter. For DVD's with many chapters it becomes quite a pain and screws up the sync.

Is there any way to get azid to properly process the resulting .ac3? Or is this perhaps a problem with smartripper, ripping too much information? (ac3dec doesn't have this problem, but that's a nother ball of wax...)

[skipper152]

I don't use azid directly, but I believe besweet uses azid for some of its processing. I sometimes get this when the -g flag to azid has a value that is too high.

I use besweet to process the audio via the vobs directly. One of the parameters I used to besweet was (with other parameters)

-azid( -g 20db )

and it gave me your warnings (not quite with the db levels you are getting; I get about 1 or 2). Tried 12db and I didn't get them.

Just trying now to get besweet to give me the overall Track gain by using the -G max flag on the -ota to besweet.

I can't tell you why or what this really does though...

Hope this helps.

[Smeg]

+60dB means you multiply the signal by a factor of about 2000. 40dB~=100 times, 12dB~=4 times. It's a logrithmic scale. So, take a normal audio signal and add it on top of itself about 2000 times. Ouch. "Garbage" probably doesn't fit, but that's definatly what it is.

But that's not the point, I can get a perfectly good .wav using DVD2AVI's audio processing when I do rip the whole .vob. And when I use that method, that's what I do. However, I would like to use SmartRipper's "Stream processing" to obtain the original .m2v and .ac3 from the DVD. I haven't been doing so because a good way to decrypt the .ac3 for me hasn't been found. The above is my problem with azid and I can't seem to find a way to fix it.

Has anyone at least seen this before?