KDVD bitrates with CQMatic
I'm using CQMatic for the KDVD template to be muxed as DVD with BBMPEG. Selecting 700MB(@ 1000) output in BBMPEG creates 716MB(@ 1024) output file, which is a full 700MB CD. This is different than the 800+MB output allowed by SVCD mux with BBMPEG.
I am trying to determine the average bitrate for CQMatic to support creation of 2 700MB output files from a DVD mux with BBMPEG. When I use vcalc, Bearson and MovieStacker, I get different average bitrate values, all of which seem to support SVCD muxing. MovieStacker does not support DVD or 1400MB output. As I can't determine the averagebitrate with the above programs, I am using a formula Kwag kindly furnished me: Output=( AverageBitrate/8 )*60*minutes. Is this the only method I can use, or should I be using a value other than 1400MB as my output size, or should I tweak something else? 1400-93(mp2 size)=( x/8 )*60*99(minutes) AverageBitrate =1760 MinimumBiterate= 1760*.57=1003 In summation: Exactly how should I determine the AverageBitrate for KDVD output to be used with CQMatic? |
Hi nicksteel,
The formula above should be accurate, but you have to subtract ~20MB ( ~20,480KB ) for DVD authoring overhead from your final file size. -kwag |
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I'll test tonight as: 1400-93(mp2 size)-20=( x/8 )*60*99(minutes) AverageBitrate =1735 MinimumBiterate= 1735*.57=989 I assume the formulas used for SVCD AverageBitrate calculation programs will not work for DVD. Will CQMatic handle this difference in the AverageBitrate routine you are going to include? None of the bitrate calculators I have tried give the formula's results, but the formula does seem to predict pretty well. I assume that SVCD AverageBitrate is different than DVD AverageBitrate, as DVD muxing at 700MB filesize fills a disk at 715MB rather that the 830MB of a SVCD mux. |
CQMatic KDVD results high
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M2V size 1360503 DVD files muxed by BBMPEG @ 700 out: 715620 715640 83000 Should padding be enabled in TMPGEnc? How should I tweak formula to fit DVD rather than SVCD output? Do I need to rerun with Interlaced Source checked on CQMatic using the following avs? http://www.kvcd.net CQMatic Version 1.1.01 Copyright Softronex Corporation, 2003. All rights reserved. Time: 19:36:34 Date: 08/05/2003 Ready! Project: H:\sol\sol20.tpr Creating: CQMatic.tpr H:\sol\sol20.m2v Execute. Movie Time: 99 Average Bitrate: 1733 Full Encode mode Executing Prediction Phase... Process started at 19:37:23 On 08/05/2003 CQ set for prediction Setting up initial sampling. Using CQ of 60.00 Prediction cycle #1 Encoder started... Process time: 8.23 minutes. Encoder end. File size difference = 1.305032 Low fence: 60.000000 High fence: 90.000000 Last CQ = 60.00 Current CQ = 78.30 CQ difference = 18.301933 Using CQ of 78.30 Prediction cycle #2 Encoder started... Process time: 8.08 minutes. Encoder end. File size difference = 1.154955 Low fence: 78.301933 High fence: 90.000000 Last CQ = 78.30 Current CQ = 90.00 CQ difference = 11.698067 Using CQ of 90.00 Prediction cycle #3 Encoder started... Process time: 8.12 minutes. Encoder end. File size difference = 0.868006 Low fence: 78.301933 High fence: 90.000000 Last CQ = 90.00 Current CQ = 84.15 CQ difference = 5.849030 Using CQ of 84.15 Prediction cycle #4 Encoder started... Process time: 8.10 minutes. Encoder end. File size difference = 1.054173 Low fence: 84.150970 High fence: 90.000000 Last CQ = 84.15 Current CQ = 87.08 CQ difference = 2.924515 Using CQ of 87.08 Prediction cycle #5 Encoder started... Process time: 8.10 minutes. Encoder end. File size difference = 0.929318 Low fence: 84.150970 High fence: 87.075485 Last CQ = 87.08 Current CQ = 85.61 CQ difference = 1.462257 Using CQ of 85.61 Prediction cycle #6 Encoder started... Process time: 8.68 minutes. Encoder end. File size difference = 0.988914 Low fence: 84.150970 High fence: 85.613228 Last CQ = 85.61 Current CQ = 84.66 CQ difference = 0.949089 Using CQ of 84.66 Prediction cycle #7 Encoder started... Process time: 8.32 minutes. Encoder end. File size difference = 1.031411 Low fence: 84.664139 High fence: 85.613228 Last CQ = 84.66 Current CQ = 85.14 CQ difference = 0.474548 Using CQ of 85.14 Prediction cycle #8 Encoder started... Process time: 8.32 minutes. Encoder end. File size difference = 1.009933 Low fence: 85.138687 High fence: 85.613228 Last CQ = 85.14 Current CQ = 85.61 CQ difference = 0.474541 Using CQ of 85.61 Prediction cycle #9 Encoder started... Process time: 8.10 minutes. Encoder end. File size difference = 0.988914 Low fence: 85.138687 High fence: 85.613228 Last CQ = 85.61 Current CQ = 85.38 CQ difference = 0.237267 Using CQ of 85.38 Prediction cycle #10 Encoder started... Process time: 8.10 minutes. Encoder end. File size difference = 0.999074 Low fence: 85.138687 High fence: 85.375961 Last CQ = 85.38 Current CQ = 85.30 CQ difference = 0.079056 Encoding set to Full encode. Full encode start... CQMatic complete! Total minutes of process: 82.18 Process ended at 20:59:34 On 08/05/2003 LoadPlugin("c:\video\dlls\MPEG2DEC.dll") LoadPlugin("c:\video\dlls\sampler.dll") LoadPlugin("c:\video\dlls\decomblegacy.dll") LoadPlugin("c:\video\dlls\dustv5.dll") LoadPlugin("c:\video\dlls\legalclip.dll") LoadPlugin("c:\video\dlls\unfilter.dll") LoadPlugin("c:\video\dlls\fluxsmooth.dll") LoadPlugin("c:\video\dlls\GripFit_preview.dll") LoadPlugin("c:\video\dlls\STMedianFilter.dll") MPEG2Source("d:\sol\sol.d2v") telecide() decimate() LegalClip() unfilter(50,50) GripCrop( 720,480 ) GripSize(resizer="BicubicResize") STMedianFilter(8, 32, 0, 0, 8, 32) # SpaceDust() # Optional - for some "not so clean" DVDs. temporalsmoother(1,2) mergechroma(blur(1.50)) mergeluma(blur(0.1)) # Convolution3d or DCTFilter for extreme worse cases. GripBorders() LetterBox(16, 16, 16, 16) LegalClip() #Sampler(length=24) ##MPEG size = ((Total frames/MovieTimeInMinutes)/24) * MPEG sample file size ## |
Re: CQMatic KDVD results high
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-kwag |
Re: CQMatic KDVD results high
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Also, should I use .57 Minimum Bitrate for DVD or the 300 Minimum default? (With padding off) |
Re: CQMatic KDVD results high
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The 0.57 * average is still good, because it pushes the CQ curve up. So prediction will be better. Also, try the latest version of CQM (1.1.02), which should be more accurate than the previous versions. -kwag |
Re: CQMatic KDVD results high
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I've noticed so far that the m2v's are about 5.5% larger than target. |
Re: CQMatic KDVD results high
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-kwag |
Re: CQMatic KDVD results high
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Re: CQMatic KDVD results high
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They are valid questions :cool: -kwag |
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