Bitrates: What to do with CQmatic Results

xpronic · #1 04-08-2004, 12:41 PM

I have run CQMatic with prediction x1 mode. How do I find out what CQ to use?

Here is the log:

Code:

http://www.kvcd.net
CQMatic Version 1.2.06
Copyright Softronex Corporation, 2003.
All rights reserved.
Time: 17:08:49 Date: 04/08/2004
Ready!
Project: D:\Documents and Settings\Michael\My Documents\ss.tpr

Creating: CQMatic.tpr

D:\My Films\ss.m1v
Project resolution: 544x480
Execute.
Movie Time: 102
Average Bitrate: 942
Prediction Only mode
Executing Prediction Phase...
Process started at 17:09:08
On 04/08/2004
CQ set for prediction
Setting up initial sampling.
Using CQ of 60.00
Prediction cycle #1
Encoder started...
Process time: 10.05 minutes.
Encoder end.
File size difference  = 0.878929
Low fence: 2.000000
High fence: 60.000000
Last CQ = 60.00
Current CQ = 52.74
CQ difference = 7.264236
Using CQ of 52.74
Prediction cycle #2
Encoder started...
Process time: 9.87 minutes.
Encoder end.
File size difference  = 1.035610
Low fence: 52.735764
High fence: 60.000000
Last CQ = 52.74
Current CQ = 56.37
CQ difference = 3.632118
Using CQ of 56.37
Prediction cycle #3
Encoder started...
Process time: 9.87 minutes.
Encoder end.
File size difference  = 0.992705
Low fence: 52.735764
High fence: 56.367882
Last CQ = 56.37
Current CQ = 54.55
CQ difference = 1.816059
Using CQ of 54.55
Prediction cycle #4
Encoder started...
Process time: 9.92 minutes.
Encoder end.
File size difference  = 1.023779
Low fence: 54.551823
High fence: 56.367882
Last CQ = 54.55
Current CQ = 55.46
CQ difference = 0.908031
Using CQ of 55.46
Prediction cycle #5
Encoder started...
Process time: 9.90 minutes.
Encoder end.
File size difference  = 1.023775
Low fence: 55.459854
High fence: 56.367882
Last CQ = 55.46
Current CQ = 55.91
CQ difference = 0.454014
Using CQ of 55.91
Prediction cycle #6
Encoder started...
Process time: 9.93 minutes.
Encoder end.
File size difference  = 1.023773
Low fence: 55.913868
High fence: 56.367882
Last CQ = 55.91
Current CQ = 56.14
CQ difference = 0.227009
Using CQ of 56.14
Prediction cycle #7
Encoder started...
Process time: 10.10 minutes.
Encoder end.
File size difference  = 1.008057
Low fence: 56.140877
High fence: 56.367882
Last CQ = 56.14
Current CQ = 56.25
CQ difference = 0.113503
Final CQ value is 56.14
CQMatic complete!
Total minutes of process: 69.65
Process ended at 18:18:46
On 04/08/2004

kwag · #2 04-08-2004, 01:19 PM

Quote:

Originally Posted by xpronic

I have run CQMatic with prediction x1 mode. How do I find out what CQ to use?

Final CQ value is 56.14

-kwag

xpronic · #3 04-08-2004, 01:33 PM

Damn not again ¬_¬, I keep on missing the small details.

arana · #4 05-13-2004, 08:29 PM

in this particular case will this value be used in CQ only?
or can it be used for CQ_VBR????

and using CQ_VBR what will the best MAX and Minimum bitrate values
to use? or just leave those by default (0-3000)?

kwag · #5 05-13-2004, 08:34 PM

Quote:

Originally Posted by arana

in this particular case will this value be used in CQ only?
or can it be used for CQ_VBR????

No

The vales for CQ are completely different than for CQ_VBR.

Quote:

and using CQ_VBR what will the best MAX and Minimum bitrate values
to use?

Same as for CQ.

Quote:

or just leave those by default (0-3000)?

WHere did you get those values

-kwag

arana · #6 05-13-2004, 08:43 PM

Quote:

WHere did you get those values

-kwag

those values are the default values in tmpgenc dialog box for VCD
and for kvcdx3 it gives me 0-0 :S

Dialhot · #7 05-13-2004, 08:46 PM

Quote:

Originally Posted by kwag

WHere did you get those values

Surely in an "Avalon's very own KVCD template for awesome results with CQ=20, I swear I did it mylself" DLed somewhere on the internet

kwag · #8 05-13-2004, 08:47 PM

That's what I thought

arana · #9 05-13-2004, 08:50 PM

lol
nop not that guide, just i thot some values must be there other than 0-0
vcd used 0-3000 in the template, im just trying to figurout wich values will be "acceptable" here for avergae quality

Dialhot · #10 05-13-2004, 09:00 PM

64-2300
(or 300-2300 if your standalone can't play too low bitrates).

Note: VCD standard is 1150-1150 so I really don't know where you had taken these values.

arana · #11 05-13-2004, 09:07 PM

just load a vcd template on tmpgenc, unlock the rate control option
select cq_vbr
and there they are 0-3000

do the same on kvcdx3 and it says 0-0

thank you again Dialhot

if i ever meet you ill have to pay the beers!

kwag · #12 05-13-2004, 09:33 PM

Quote:

Originally Posted by arana

do the same on kvcdx3 and it says 0-0

I did that on purpose, so that people wouldn't use CQ_VBR

CQ_VBR is good only for 352x240(28

.
Nothing else.

-kwag