Log in

View Full Version : CCE and nos of passes


MSlv
12th May 2005, 19:50
I have a question about CCE multipass vbr encode.

If I want to recompress a DVD to fit 4.7GB (4.35 GB), and the movie is pretty long (think LOTR EE), the bitrate gets very low, maybe under 2500... Or I want to put multiple movies on a DVD+R...

Will I get better video if I use many passes? I read that something between 4-6 passes is enough, but what's the difference between a 6-pass encode and a 12-pass encode? I understand that the quality won't look twice as good, as this's impossible, but will there be any difference at all?

Also, theoretically, how would a 6-pass compare to a 50-pass encode?

Fishman0919
12th May 2005, 21:23
The idea behind more then two passes, is in short, to take a little from here where it might not be needed and put it over here where it MIGHT look better. It's not a magic wheel that the more you turn it the better it gets, the enocoder can magicaly pull bits out of nothing. CCE gets ALL the info it need to encode the video in the first pass (.vaf pass) and applies it in the second pass.. it simple (well maybe not real simple) math... the 1st pass gives the encoder the info it need and then distribute the bits to where they are needed on the 2nd.... the 3rd, 4th, 5th and so on are really just 2nd and 3rd guesses and not every guess is going to be better... In some test 6 or 7 passes look worst then 2 or 3.

Hey, you can do as many passes as you want but it not always the best... I do 2 passes on just about everything and for something long (like LOTR)... 3 passes wouldn't hurt

kolak
12th May 2005, 22:55
If you go over 3 you'll simply waste the time

MSlv
13th May 2005, 06:46
thanks.

tigerman8u
13th May 2005, 15:38
I usually use two passes unless it's a high action video to allow better distribution of the bitrate.

guada 2
14th May 2005, 13:36
Hello, :)

By curiosity, i have two questions:

Which is the interest to propose as many "passes" if it are not used for nothing?

At which time it is really useful and why?


NOTE: I await clear and precise answers and not of a little near.

Thank you

onesoul
14th May 2005, 21:11
NOTE: I await clear and precise answers and not of a little near. If you want that then you should ask cce developers and don't forget to report back. I too want know about this mistery.

But like it's been said, don't expect improvements beyond 2-3 passes.

guada 2
14th May 2005, 21:30
You are right surely...
It was only one bracket.

Thank you very much.
I adore the rabbit white, follow it and perhaps you will see "MATRIX ONESOUL". :p :)

Goodbye..

onesoul
14th May 2005, 22:31
I adore the rabbit white, follow it and perhaps you will see "MATRIX ONESOUL". I hope it is better than falling into a hole ;) :D
I like very much the matrix triology also :)

guada 2
15th May 2005, 21:01
Hello onesoul,

Attention..., because all the holes are not identical. :D

Do you know a half hole? :D

I hope to have stopped you a hole. :) :D