06-30-2003, 10:53 AM
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Kwag,
Does the latest changes on the optimize script applicable or will work best only for a very clean material like DVD?
Thanks,
Dredj
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Someday, 12:01 PM
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06-30-2003, 12:29 PM
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Quote:
Originally Posted by audi2honda
Well I wasn't as luck. Came up 30MB short on a 800mb CD encode with the new script. Looks great though, so I'll settle for a little loss in space.
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Was that with "Fast" predition or full prediction Quote:
Kwag, are you using 1 sample per minute and the auto sample size for your prediction?
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Yes I am.
-kwag
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06-30-2003, 12:36 PM
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All I can show about how things are going is: keep up the good work ppl shows what teamwork can do.
(had to do this one seen it and thought it was funny)
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06-30-2003, 12:46 PM
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Jorel sent me that one
-kwag
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06-30-2003, 12:52 PM
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Quote:
Originally Posted by kwag
Quote:
Originally Posted by audi2honda
Well I wasn't as luck. Came up 30MB short on a 800mb CD encode with the new script. Looks great though, so I'll settle for a little loss in space.
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Was that with "Fast" predition or full prediction Quote:
Kwag, are you using 1 sample per minute and the auto sample size for your prediction?
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Yes I am.
-kwag
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That was with Full prediction set to .5% precision. When I used fast i got a CQ 5 pts lower
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06-30-2003, 04:17 PM
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Man this stinks. A new movie just finished and was 7% short of target for 1CD. 50 wasted MB bah
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06-30-2003, 04:22 PM
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Quote:
Originally Posted by audi2honda
Man this stinks. A new movie just finished and was 7% short of target for 1CD. 50 wasted MB bah
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Could it be because these videos I'm encoding are hybrids (about 70% film and 30%) video and I'm using telecide and decimate to bring everything to 23.976 fps? Could something like that throw prediction that far off?
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06-30-2003, 04:35 PM
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hey audi, you're not the only one getting short video files! Kwag are you the only one getting accurate prediction? Sometimes my movies are only 90 min long so I usually do prediction with 2 samples per minute. In my latest encode:
Required Video Size: 732,032,000
Encoded Video Size: 693,986,212
That's 38 Mb short, or 5.2% off. Frankly I don't know what this means but a prediction factor of 1.0 for me is NOT doing the trick.
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06-30-2003, 04:36 PM
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@audi2honda,
You bet it can
You'll probably need to sample a wider "window" to get a better accurate result, and even that I'm not sure if it will be accurate enough. All my encodes have been progressive. I'm pretty sure that if your material was 100% telecined, and you use telecide and decimate, you'll still get accurate resulte. But mixed Not sure.
-kwag
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06-30-2003, 04:45 PM
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Ok I'll try one of my progressive DVDs tonight when I get home.
J-Wo are you having problems on clean progressive material or just other material?
My current project are DVD versions of a television series that have all sorts of hybrid nasty interlaced stuff in them. Telecide and decimate produce wonderful results, but I guess that could be throwing prediction.
Kwag do you recommend more samples per minute or a longer sample size? or both?
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06-30-2003, 04:51 PM
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Quote:
Originally Posted by audi2honda
Kwag do you recommend more samples per minute or a longer sample size? or both?
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You're probably going to have to do 48 or to 60 frames per sample, and then maybe at least 100 samples per movie. And still I'm not sure of the results, because of the randomness of the mixed nature of your source
-kwag
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06-30-2003, 04:56 PM
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It's a randome mixture but after frameserving from AVS with the telecide and decimate functions isn't it all clean 23.976 when it gets to TMPGEnc? I would think in that case prediction would be accurate because TMPGEnc doesn't know since it's allready been converted or IVTC'd
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06-30-2003, 05:01 PM
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Yes but because the film is not going to be smooth ( some parts will be smooth and some will be jumpy ) that will throw off any prediction for sure
-kwag
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06-30-2003, 05:37 PM
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Quote:
Originally Posted by kwag
Yes but because the film is not going to be smooth ( some parts will be smooth and some will be jumpy ) that will throw off any prediction for sure
-kwag
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True True. Thanks kwag I'll try one of my regular dvd's tonight to see what happens.
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06-30-2003, 06:01 PM
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audi: yes, my sources are 100% film and all progressive. They are from clean DVD or SVCD sources. Kwag, any idea what is throwing off prediction for me? I almost want to revert back to before you got MA with full linearity
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06-30-2003, 06:54 PM
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Quote:
Originally Posted by J-Wo
Kwag, any idea what is throwing off prediction for me?
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I have no idea , but I would like to hear more success/fail stories from many people about this. So far I have encoded three different movies, and the results have been just excelent. I still prefer using the full prediction mode, even if it takes from 20 to 30 extra minutes.
-kwag
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06-30-2003, 09:16 PM
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Quote:
Originally Posted by kwag
Quote:
Originally Posted by J-Wo
Kwag, any idea what is throwing off prediction for me?
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I have no idea , but I would like to hear more success/fail stories from many people about this. So far I have encoded three different movies, and the results have been just excelent. I still prefer using the full prediction mode, even if it takes from 20 to 30 extra minutes.
-kwag
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I was off my self today by 30mb got a 670mb file when it should have been ~700mb to go with a 95mb audio file, use fast pred. maybe we have to chainge presicion to .10 w action movies . But one thing i did was cutting credits at the end don't think that would throw off pred. though.
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06-30-2003, 09:52 PM
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Hey guys, I was having some trouble with prediction too, my video files were also 30-40megs short or so. I think I've gotten around it by changing the # of frames per sample from 24 to 48, and the # of samples per minute from 1 to 2. I'm also following Kwag's advice and doing full prediction, which always seems to increase CQ by a liiiiiiiitle bit vs. fast prediction. But there it is.
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06-30-2003, 09:59 PM
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Well, today I encoded the same movie (K19) twice, but after the first encode, I changed the prediction to full without exiting ToK. I did this on purpose to log the "fast" CQ and the "normal" CQ on the same log. Here's the complete log:
Code:
=============================================================
ToK Log: F:\k19.avs
=============================================================
Resolution (fps):528x480 (23.976 fps)
Total Frames: 198673
Total Time : 02:18:06
-------------------------------------------------------------
Audio Size: 116,004,000
Required Video Size: 703,196,000
Factor: 59.940
Desired Sample Size: 11,731,665
-------------------------------------------------------------
New Faster Prediction
-------------------------------------------------------------
Full Sample
Next CQ: 64.740. Sample Size: 12,672,395
Small Sample
Next CQ: 64.740. Sample Size: 1,142,434
Predicting...
Next CQ: 59.934. Sample Size: 11,538,292
Next CQ: 61.545. Sample Size: 11,565,668
Next CQ: 62.584. Sample Size: 11,696,326
Exit Condition: 0.500 % reached ! yahoo !
Tries : 4
Final CQ: 62.584
Total Time For Predicition: 00:09:55
-------------------------------------------------------------
Encoding F:\k19.avs
-------------------------------------------------------------
Encoding... CQ : 62.584
Final Encoded Size: 676,918,065
Total Time (all operations): 05:21:11
Finished
Audio Size: 116,004,000
Required Video Size: 703,196,000
Factor: 59.940
Desired Sample Size: 11,731,665
-------------------------------------------------------------
Prediction: 1st Group of Passes
-------------------------------------------------------------
Next CQ: 64.740. Sample Size: 12,672,395
Next CQ: 59.934. Sample Size: 11,228,599
Next CQ: 61.973. Sample Size: 11,264,170
Next CQ: 63.124. Sample Size: 11,845,091
Next CQ: 62.724. Sample Size: 11,533,510
Next CQ: 62.951. Sample Size: 11,711,037
Exit Condition: 0.500 % reached ! yahoo !
Tries : 6
Final CQ: 62.951
Total Time For Predicition: 00:41:34
-------------------------------------------------------------
Encoding F:\k19.avs
-------------------------------------------------------------
Encoding... CQ : 62.951
Final Encoded Size: 696,413,210
Total Time (all operations): 06:08:00
Finished
Obviously the fast prediction is under target most of the time. And look at the difference on CQ values.
With fast, CQ = 62.584 and file size = 676,918,065
Witn normal, CQ= 62.951 and file size = 696,413,210
Look at the difference in file size, 19,495,145KB but on CQ, it's only 0.367
Again I got 0.964% ( less than 1% again! ) accuracy with the long prediction.
That's why I'll wait the extra time for the longer prediction
-kwag
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06-30-2003, 10:19 PM
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Quote:
Obviously the fast prediction is under target most of the time. And look at the difference on CQ values.
With fast, CQ = 62.584 and file size = 676,918,065
Witn normal, CQ= 62.951 and file size = 696,413,210
Look at the difference in file size, 19,495,145KB but on CQ, it's only 0.367
Again I got 0.964% ( less than 1% again! ) accuracy with the long prediction.
That's why I'll wait the extra time for the longer prediction
-kwag
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Yes i see a diference of 20mb in file size, but is there a difference
in Quality between 62.58% n 62.95% i dont think so but it would be great to be closer to the target w fast prediction.
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