Quantcast Is there a Way to Predict the CQ_VBR Value - digitalFAQ.com Forums [Archives]
  #1  
01-09-2003, 11:00 AM
Holomatrix Holomatrix is offline
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I am trying to use TMPG with dvd2svcd and when I encoded Monsters Inc. last night I awoke to a 338 MB mpeg and dvd2svcd choosed a CQ value of -221.77 ??? the movie is only 92 min. CQ offset started at 30. so is there away I can calculate a fixed CQ value to use and use bitratecalc to add the min and max bitrates?
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01-09-2003, 11:39 AM
kwag kwag is offline
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Hi Holomatrix,

Yes you can . Just select "Use fixed CQ value" under the "Encoder" tab, and manually use file prediction with your .avs script. Then use your CQ value and set it on DVD2SVCD
You must also set "Edit as part of Video Encoding" under "Frameserver" so that you can paste your custom .avs script there.

-kwag
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01-09-2003, 11:40 AM
SansGrip SansGrip is offline
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An idea has been forming in my head regarding predicting a good starting CQ_VBR value for encoding samples, involving bytes per frame and the resolution of the movie minus borders. I've not done anything to formalize it yet, though, but when I do it'll be incorporated into KVCDP .
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01-09-2003, 11:59 AM
Holomatrix Holomatrix is offline
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Quote:
Originally Posted by kwag
Hi Holomatrix,

Yes you can . Just select "Use fixed CQ value" under the "Encoder" tab, and manually use file prediction with your .avs script. Then use your CQ value and set it on DVD2SVCD
You must also set "Edit as part of Video Encoding" under "Frameserver" so that you can paste your custom .avs script there.

-kwag
Do you mean use FitCD to get a script? or use Sans prediction calc?
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01-09-2003, 12:06 PM
kwag kwag is offline
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Quote:
Originally Posted by Holomatrix
Do you mean use FitCD to get a script? or use Sans prediction calc?
Both
The easy way: KVCDPredictor. The harder way: Manually
But always use FitCD to get your correct resize, croping, etc.

-kwag
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  #6  
01-09-2003, 12:57 PM
Holomatrix Holomatrix is offline
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Quote:
Originally Posted by kwag
Quote:
Originally Posted by Holomatrix
Do you mean use FitCD to get a script? or use Sans prediction calc?
Both
The easy way: KVCDPredictor. The harder way: Manually
But always use FitCD to get your correct resize, croping, etc.

-kwag
Ok, well using KVCDPredictor I get this, of course I still need to add Flux and Block,(is there anythig else to adjust?) but I don't see were it tells me the CQ value I need to set?

LoadPlugin("C:\Program Files\DVD2SVCD\MPEG2Dec\MPEG2DEC.dll")
mpeg2source("C:\MovieRip\DVD2AVI_PROJECT_FILE.d2v" )
BilinearResize(320,320,0,0,720,480)
AddBorders(16,80,16,80)

###--------------------- Start Of File Size Prediction ----------------------###

IL = Framecount / 100 # interval length in frames
SL = round(Framerate) # sample length in frames
SelectRangeEvery(IL,SL)
## MPEG size = ((Total frames/Framerate)/100) * (MPEG sample file size * .95) ##

###------------------------End File Size Prediction------------------
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01-09-2003, 01:13 PM
kwag kwag is offline
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Hey Holomatrix,

You're still using the old version of FitCD. Please download the new one here: http://www.kvcd.net/forum/viewtopic.php?t=2142

Read "new_bee's" post in this thread for some instructions on using Predictor: http://www.kvcd.net/forum/viewtopic.php?t=2267

-kwag
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  #8  
01-09-2003, 01:40 PM
Holomatrix Holomatrix is offline
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Ok, thanks, I'll check it out
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