Quantcast Bitrates: TMPGEnc and CQmatic, CQ Very Low? - digitalFAQ.com Forums [Archives]
  #1  
06-29-2004, 09:42 AM
Fluffbutt Fluffbutt is offline
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Just a quick question... Using tmpgenc (TMpgEnc Plus 2.5.21.58.169) and CqMatic 1301.

It all works perfectly, I got a 690 Mb m1v and a 70 odd Mb mp2, musex them to make a sub 800Mb kvcd, ok.

My question is: During all the work, cqmatic came up with a cq of 20.56. That's for d2v from good dvd source. Tmpg res ws 352x x288 vcd size.

So how come you guys have shown logs of >60 for cq with bigger size res (480 x ?? was one (the ?? is wher I forget the numbers )

Interestingly enough, the kvcd looks very nice, very few blocks, etc.

Just that wierdo low cq gets me wondering.
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06-29-2004, 10:34 AM
Dialhot Dialhot is offline
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It is definitely NOT possible to find a source encoded in CQ < 50 watchable

Don't you use CQ_VBR ?
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06-29-2004, 12:17 PM
Fluffbutt Fluffbutt is offline
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Hang on, I'll check (this is my first full Tmpg kvcd)...

Yep. So 20 odd is normal for cq_vbr? (minrate was 200, max was 1850). Whew!

Just out of interest, why is cq_vbr so low, and plain cq high?

Thanks, Dialhot!
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06-29-2004, 12:29 PM
Dialhot Dialhot is offline
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Quote:
Originally Posted by Fluffbutt
So 20 odd is normal for cq_vbr? (minrate was 200, max was 1850). Whew!
Yes it is. The scale is not the same :

CQ=70 -> CQ_VBR=18/20
CQ=75 -> CQ_VBR=20/22
CQ=80 -> CQ_VBR= 23/25
...

Quote:
Just out of interest, why is cq_vbr so low, and plain cq high?
Ask to the developpers
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06-29-2004, 10:18 PM
Fluffbutt Fluffbutt is offline
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Thanks, Dialhot. Excellent info there!

<Fluffbutt purrrs are winging their way to you!!>
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