Point of dimishing returns

[Compubiker]

Newbie here. If this has been asked before, let me apologize in advance. I have not seen it addressed in the FAQs.

Is there a point at which increasing the number of VBR passes stops yielding better quality? I am using 5 pass at the moment for backing up DVDs and a long encoding time is no big deal.

thanks,
C-B

[xrv1138]

4 pass
and its all over the forum
the search function works just fine

[markrb]

According to the people at CCE their program reaches it's theoretical limit somewhere between 3 and 4 passes depending on each movie.

Mark

[Compubiker]

Mark, thank you very much. Looks like I am overdoing it.

C-B

[markrb]

I overdo it myself. I do 5 pass just because I can.
I have a fast enough computer so if I start an encode before I go to bed it's done by the time I wake up even at 5 pass. It doesn't hurt.

Mark

[SiliconSoul]

yeah i also can do a 5 pass overnight.... im going to do a 10 pass tonight and see how many it gets through... and if it is at 6-9
ill set it about how far it had gotten... and that way i ahve to be getting the best quality!

:)

i hope!

[mrbass]

careful there...I tried a 20 pass cuz it, the computer, had all weekend and I wanted to see for the hell of it but it crashed. Lemme know if 10 pass is even actually doable just for the record book if for no other reason.

[Compubiker]

I am running a 1.33 athlon at the moment, but my next project is on the kitchen table waiting for the mail to bring me the parts. It's gonna be a water cooled XP2000 with 768MB of Corsair PC2700 and my video drives are going to be Promise RAID0. I can't wait to see how it does.

C-B

[Dropbear]

Pentium 4's with RDRAM blow Athlons out of the water for this sort of application........ depressing but true.. it's all down to memory bandwidth..

[SiliconSoul]

my 10 pass completed... i only used the first vob file... but the quality does not seem to be much better than a 4 or 5 pass encode!

athlon xp 1700+
epox 8kha+
512 pc2100

[SiliconSoul]

from my understanding higher bitrate will always make it look better than a 10-20 pass encode... as long as it is 3-4 pass....

okay but what about if you are trying the max avg at 800 ? would 10-20 pass help that at all?

[SiliconSoul]

Bump! :D

[Labersack]

It depends on the movie. If there are enough slow scenes, the faster scenes will get some more bits. But You don't need to do a 20pass, I think after 5-6pass it won't get any better. And with avg.800 you won't get a real good standard-SVCD, with that bitrate you have to reduce resolution and do some other tricks.