Quantcast Bitrates: Prediction for Now... - digitalFAQ.com Forums [Archives]
  #1  
08-03-2003, 04:52 AM
Bchteam Bchteam is offline
Free Member
 
Join Date: Jan 2003
Posts: 275
Thanks: 0
Thanked 0 Times in 0 Posts
Since kwag is completely reworking the whole prediction algorythm, we should post our personal prediction Methods, that are bringing us accurate results to some extent. This should be a temporary way to get accurate results, until kwag is done with the new algorythm.

So, I make the Start:

To find out the average and minimum bitrate, I use Vhelp's vcalc. My Settings:

Using: 1000k

MS Precision: Unchecked

min. precision: Unchecked


For the prediction I use CQ - Matic 1.0 RC 5, since 1.05.00 gave me way too high CQ's.

With this Method, I got acceptable results.

Please post your methods in this thread.
Reply With Quote
Someday, 12:01 PM
admin's Avatar
Site Staff / Ad Manager
 
Join Date: Dec 2002
Posts: 42
Thanks: ∞
Thanked 42 Times in 42 Posts
  #2  
08-03-2003, 08:01 AM
rendalunit rendalunit is offline
Free Member
 
Join Date: Apr 2002
Location: san jose, Ca
Posts: 1,148
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by Bchteam
To find out the average and minimum bitrate, I use Vhelp's vcalc. My Settings:

Using: 1000k

MS Precision: Unchecked

min. precision: Unchecked
Those settings will give you a much lower avg. bitrate than the "actual" one you need (which I guess helps to keep the vid. size from going over )

I'm having great success with CQMatic 1.04 with DivX sources
I'm using Bearson's calc to get the bitrate and I'm only using Lanczos resizer at 352x240 with no other filters

btw- previous versions of CQMatic 1.0x has been very accurately predicting cq of two cd dvd rips also with MA script ;D I did however see Bud's post about the filesize going way over- that's weird

ren
Reply With Quote
  #3  
08-03-2003, 08:08 AM
Bchteam Bchteam is offline
Free Member
 
Join Date: Jan 2003
Posts: 275
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Those settings will give you a much lower avg. bitrate than the "actual" one you need (which I guess helps to keep the vid. size from going over )
I know, but with the "actual" settings I was over 30 MB.

And what is bearson's Calculator. Where can I use it
Reply With Quote
  #4  
08-03-2003, 08:20 AM
rendalunit rendalunit is offline
Free Member
 
Join Date: Apr 2002
Location: san jose, Ca
Posts: 1,148
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by Bchteam
And what is bearson's Calculator. Where can I use it
Bearson's bitrate calculator is a very simple no bullsh*t calc that you can download from Doom9 download section
Reply With Quote
  #5  
08-03-2003, 09:05 AM
jorel jorel is offline
Invalid Email / Banned / Spammer
 
Join Date: Aug 2002
Location: Brasil - MG - third stone from the sun
Posts: 5,570
Thanks: 0
Thanked 0 Times in 0 Posts
thanks for great hint friendal!

Reply With Quote
  #6  
08-03-2003, 10:55 AM
vhelp vhelp is offline
Free Member
 
Join Date: Jan 2003
Posts: 1,009
Thanks: 0
Thanked 0 Times in 0 Posts
@ all..

FYI on VCALC...
In addition to my older bitrate formula (which I'll still be using) Bearson's
calculator is matching my NEW bitrate formula !! And, so's vcdhelp's too,
though I'm still debuggin this one.

But, bare in mind, that Bearson's calculator is using 1024k mode instead of
the 1000k mode, which vcdhelp recommends we use in our ave bitrate
calculations (and also uses as it's default)

Sorry, I've ben reading up on bitrate caluations and formulas

And, my newer VCALC will have these changes (and some other niceaties
as well)

-vhelp
Reply With Quote
  #7  
08-03-2003, 12:17 PM
rendalunit rendalunit is offline
Free Member
 
Join Date: Apr 2002
Location: san jose, Ca
Posts: 1,148
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by vhelp
And, my newer VCALC will have these changes (and some other niceaties
as well)
Hey that's great news! I had an idea the other day of an integrated standard or scientific calculator addon to yours. Kind of like this:



I drew that up in Photoshop and I thought it would be kinda cool to have an all in one bitrate and regular calculator in one place on the desktop

what'd ya think?

ren
Reply With Quote
  #8  
08-03-2003, 12:23 PM
vhelp vhelp is offline
Free Member
 
Join Date: Jan 2003
Posts: 1,009
Thanks: 0
Thanked 0 Times in 0 Posts
hi Rendalunit..

That's so weird..

Every time I am debugging my bitrate calculations and formulas, I use the
quick and dirty, M$ calc.exe app, and M$ Excel for hard-core debugging
.
.
All the while, I'm fantisizing that very same illusion

yeah, M$VCALC !! hehe.. (before Jorel beats me to this slogin)
-vhelp
Reply With Quote
Reply




Similar Threads
Thread Thread Starter Forum Replies Last Post
Bitrates: Prediction not going through the whole way... oxycotton420 Video Encoding and Conversion 2 07-08-2004 12:27 PM
Bitrates: Prediction only? KYUSS Video Encoding and Conversion 2 02-03-2004 05:22 PM
Bitrates: Prediction value not close vdk_au Video Encoding and Conversion 1 01-29-2004 04:39 AM
Bitrates: 29.97 good prediction? bigggt Video Encoding and Conversion 2 11-24-2003 09:42 PM
Bitrates: Question about prediction audi2honda Video Encoding and Conversion 20 08-08-2003 12:30 AM

Thread Tools



 
All times are GMT -5. The time now is 11:40 AM  —  vBulletin © Jelsoft Enterprises Ltd