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-   -   Bitrates: Any possibility to avoid "jumping" in prediction? (http://www.digitalfaq.com/archives/encode/4697-bitrates-possibility-avoid.html)

Razorblade2000 07-24-2003 03:37 PM

Any possibility to avoid "jumping" in prediction?
 
Is there any?
ATM I am encoding an avi file, and the jumping in the avi file REALLY slows down prediction (about 30 Minutes PER CQMagic Pass!!
Isn't it possible to create an uncompressed sample with HUFFYUV or a direct stream copy virtualdub job and use this for prediction???


P.S. Should this go into the prediction forum or in here as a feature request?

Razorblade2000 07-26-2003 07:56 AM

So I guess that's a "no" ??? :cry:

kwag 07-26-2003 11:18 AM

Re: Any possibility to avoid "jumping" in predicti
 
Quote:

Originally Posted by Razorblade2000
Is there any?
ATM I am encoding an avi file, and the jumping in the avi file REALLY slows down prediction (about 30 Minutes PER CQMagic Pass!!
Isn't it possible to create an uncompressed sample with HUFFYUV or a direct stream copy virtualdub job and use this for prediction???

Hi Razorblade,

You could make a huffy avi file, with say 30 minutes, and give it a try :idea:
The problem seems to be the "seeking" to different parts in your avi, which apparently the CODEC is not very good at, when jumping out of sequential frames.

-kwag

vhelp 07-26-2003 11:23 AM

hmm..

I read this yesterday, but fogot about it. Anyways..

My question to you is:
* Describe "jumpy" ?? That might help.

I have my own issues w/ CQM but at least my predicts last only a couple
of minutes (which I find pretty fast to me) for a 128minute movie "Dogma"
is what I use for my test platform.. though my problem w/ one issue on
this movie is that it seems to always test the SAME SCENE all 258 frames
worth. I don't know if it's a problem, but it might be. Anyways..

-vhelp

Razorblade2000 07-26-2003 11:29 AM

Yes... thats the problem...
The avi has been made with DivX SBC (so using the old 3.11 DivX Version)

The HUFFYUV idea was only ment for MPEG2 Files as Virtualbud can't do a direct stream copy there... with divx I could do a direct stream copy


Wouldn't that be a way to speed up prediction in general??? Jumping in d2v files also does take some time... having an uncompressed avi with the parts you want to be part of the prediction would be faster... wouldn't it?


EDIT:
Quote:

Describe "jumpy" ?? That might help.
take 100 frames->move 500 frames forward->take again 100 frames->move 500 frames forward->and so on...

this "jumping" in the file doesn't work very good with some movies encoded in DivX 3.11 as it takes more time to search e.g. frame nr 34567 and take 100 frames than to filter and encode these frames

vhelp 07-26-2003 11:34 AM

Hmmmm.......

I still don't understand your jumpynes, ..I keep seeing your videos jump
up and down or something like that.., but in any case..

I don't know if you are having issues w/ divX framserved for your predicts,
but if you are, you should be able to use them too.

Here's how I would frameserve divX:

* vdub(divX source) --> .vdr --> TMPG(.tpr project) --> CQMatic(.tpr)

-vhelp

Razorblade2000 07-26-2003 11:38 AM

No! Not jumping in place (up/down)
Jumping in time (directly from the 10th Minute to the 20th Minute)

I simply use the Avisource(bla.avi) function in Avisynth

vhelp 07-26-2003 11:43 AM

Hay Razor...

thanks for the description of your jumpyness (finally) :) :)

I've got a divX encode I did of "Get Karter" (1st 20min VOB) (150mb)
and I'll give it some testing w/ CQM ?? ..if you think it will help ya.

-vhelp

vhelp 07-26-2003 11:50 AM

Hay Razor..

Hmmm..., now I have a problem. I can't see any video in TMPG when I
frameserve my divX to it.. and I use to do this LOTS of times.

Damn... RATTS... this must be one of those (OLD) avisynth v2.52 crazy
installation issues that I missed, back when I first installed v2.52 and it
messed up my VFAPI and dvd2avi and other frameserving intricits.

Now, I have to figure out:
* what happened, and
* HOW to fix it

I don't know where to start :roll:

Take it easy in any case,
-vhelp


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