the wav file generated by DVD2AVI

[jimot]

Hi all..
I'm using DVD2AVI to make the .d2v and .wav file.
I notice that a few days ago I rip Bandits and the .wav filename is:
"bandit AC3 T01 3_2ch 448Kbps 48KHz.wav"

Then just now I rip ClockStoppers and the .wav filename is:
"clock AC3 T01 2_0ch 192Kbps 48KHz.wav"

The Bandit is 448Kbps but Clockstopper is 192Kbps, is it generated automatically by the program or is it my setting of the program?

Thanks

[adam]

Almost all dvds contain multiple audio streams. Usually they will at least have a dolby digital track and a Dolby 2.0 track.

You can pick which audio track dvd2avi decodes in the audio option. Usually the DD track is the first one but not always. The first wav file you posted is the DD track. It has 5 channels (3_2ch) and thus is encoded with a higher bitrate (448Kbps.) The second is the Dolby 2.0 track. It has two channels (2_0ch) and lower bitrate (192Kbps) since there are less channels to encode.

If you are making a vcd or svcd you should just use the Dolby 2.0 track because that is all that these formats support anyway, 2 channel audio.

You can see which track is which when you rip the dvd if you use smartripper. look in stream processing. Otherwise you could use flask to preview your vobs, or you could just start the decoding process in dvd2avi and note which audio track is being decoded, just look at the number of channels.

[banjazzer]

When I come across a DD soundrack, I check *Dolby Surround Downmix* in DVD2AVI. This always gives me good results. Or you could demux rather than decode the audio, which would give you the original AC3 audio. You can then play around with this using HeadAC3he to give you exactly the effect you want.

[adam]

Doing the Dolby Surround sound downmix on the DD track will probably give you results fairly comparable to the 2.0 track, but I seriously doubt it would be possible to do a better job than the professionals. So the quality is probably the same but why do the conversion if you don't have to? Downmixing takes time.

Of course this is assuming that the DVD has both a DD and a 2.0 track, but almost all do.

[banjazzer]

Most of the DVDs I come across (PAL) seem to have one or the other, but I'll make a point to check more carefully in future. If there was a 2.0 track I would use it, because it's unlikely I would do a better job than the studio. 8) The downmix doesn't seem to add much to the time with DVD2AVI, however. It's the resampling that seems to be the most lengthy process. When I decode at 48kHz it takes a fraction of the time.