Speed Question

[canoner]

I am not a big fan about menu and all the extra stuff. Just out of curiosity, I tried out the DVD-RB. The thing I noticed is DVD-RB is faster than D2S when it comes to converting DVD to DVD. I don't understand why.

To compare the two softwares, I used same settings to encode ROTK. With D2S, I ripped the DVD first, and start timing when hit "convert". CCE is set 2-pass VBR. Audio kept unchanged. English subtitle is kept. The version of D2S is 1.2.2. And the version of DVD-RB is 0.50b. I used the imagetool to burn the .iso files, and this process took about 12 minutes.

D2S took a bit over 6 hours, but DVD-RB + Imagetool took only 4 hours to finish. Why? Doesn't DVD-RB has more work to do and shouldn't it take more time?

No complaint about D2S, and I am sticking with it. I just want to figure out what I am missing. If there is a way to speed up D2S on my machine, that will be good.

[tylo]

The reason D2S took about 6 hours is that you chose what CCE (and thus D2S) calls 2-pass VBR, which is really 3 passes. DVD-RB's 2-pass is really two passes (what CCE calls 'Multipass VBR 1-pass'). So 1-pass multipass vbr in D2S equals 2-pass vbr in DVD-RB.

If you'd used D2SRoBa with D2S, the convertion would take only a little more that 2 hours (with the same quality). This is because it uses true One-pass VBR encoding.

/PS: The latest versions of DVD-RB also features a 'One-pass vbr' option which should be about as fast as D2SRoBa. Haven't tried that myself yet, though.

[canoner]

Originally posted by tylo
The reason D2S took about 6 hours is that you chose what CCE (and thus D2S) calls 2-pass VBR, which is really 3 passes. DVD-RB's 2-pass is really two passes (what CCE calls 'Multipass VBR 1-pass'). So 1-pass multipass vbr in D2S equals 2-pass vbr in DVD-RB.

If you'd used D2SRoBa with D2S, the convertion would take only a little more that 2 hours (with the same quality). This is because it uses true One-pass VBR encoding.

/PS: The latest versions of DVD-RB also features a 'One-pass vbr' option which should be about as fast as D2SRoBa. Haven't tried that myself yet, though.

That explains it. How does is DVD-RB's 2-pass compare to D2S's 2-pass (really 3-pass) in term of quality? I assume that extra pass should benifit the quality, right?

Yeah, I have used D2SRoba with D2S a couple of times recently. Both time, an extra round of encoding was forced because of undersizing. I set the undersizing limit to be 1.5%. Maybe I should relax it a bit. It is really a wonderful plug-in though.

[bobwillis]

Hi canoner,

I would suggest that D2S's picture quality is better than DVD-RB, because the target bitrate is set for the whole movie, rather than on a per-chapter basis. This ensures that the parts of the movie that require high bitrate actually receive it; rather than the distribution just being determined by the original disc's per-chapter bitrate.

Regarding D2SRoBa, 2 pass (OPV + the additional VBR resizing pass) gives quality equal to a 5 pass VBR (4+VAF) encode. I have tried comparing with many low bitrate movies (schindler's list, private ryan etc), and quite frankly, cannot see a difference.

Regards,
Bob

[canoner]

Is there a way to let DVD-RB distribute bitrate between the whole movie, not each chapter? Will doing 3-pass get that?