multipass VBR or Robshot?

[sidar]

hello guys,

so i want to ask you directly, if you tried
-robshot cce method, under "getting best out cce" guide
-directly multipass VBR method with 3-4 passes, cce sp
-directly one pass VBR method, cce sp

and if you played them on your TV, could you please vote yours? :)

[jdobbs]

I prefer the Robshot method. Two passes - high quality. If you have lots of room on the disc (like a home video) -- I do single pass with the Q set to around 20.

I really can't tell any difference between the Robshot method and 4 pass VBR.

[sidar]

@all
guys, there should be more than 4 who uses CCE for encoding :) please vote your way!

@jdobbs
but with single pass, you cant predict the file size, so it couldnt fit the dvdr. am I wrong? and if you cant tell the difference, why you choose robshot method instead of 4pass vbr? :sly: . dont blame if it is a stupid question! :)

[auenf]

uhh, i dont see difference between multipass and robshot, and i use them both:

i use the robshot method to basically get the file to as small as possible, while keeping the Q under 9.

i use the multipass method to get the movie to a certain bitrate (ie SVCD) at the highest quality.

Enf...

[jdobbs]

@serdar,

You're right. You can't predict the size very exactly in single pass, but after you've done a few you can guess pretty close based on the complexity of the video and the Q factor. Since most home videos aren't very long it typically doesn't matter, as they will fit pretty easily anyway. The other option if the source is short enough is to just max out at a constant bitrate...

jdobbs

[Arky]

I tend to favour the RobShot method, but generally find I can just make one 1xVBR pass (at Q=25), (to get the vaf file), and then alter the bitrate GLOBALLY, rather than incrementally, on a local-level, and I get great results from the subsequent (*single*) "multi-pass". As I mentioned in another thread, U get greta results with 2.66, whereas there were times with previous builds when I was not particularly happy with the outcome.


Arky ;o)

[sidar]

thanks to all you guys for replies!

is there any documention about that, if CCE use the VAF file, for single pass? I mean, if we do single pass, do we really need to do vaf? it is selected by default for single pass in cce, but i'm deeply suspicious about cce use that vaf file for single pass... i think cce use the vaf file only for multipass, or for using advanced settings.

[jdobbs]

CCE doesn't use the VAF for single pass, but it does create it, making improvement through additional passes possible. The CCE Manual is the best place to read about this. It's available in PDF format with the Trial version (at least with 2.50).

[sidar]

thanks jdobbs, ill look for it! good to hear there is another source i can read :)