New highly accurate prediction method reported by jorel!
First of all, thanks to jorel for finding this out and doing many many encodes to confirm this.
When using ToK, or even manual KVCD prediction ( ;) ), instead of using 24 frames for the length of the sample (Or Auto mode), use 3* frame rate. So if you are using ToK, go to "Prediction & Spacing" and uncheck Auto, and if you are encoding at 23.976 fps, change the length of samples to 72. If you are encoding PAL (25fps), change it to 75. If encoding NTSC 29.97fps, change it to 90. Now see how accurate your results are 8) Thanks jorel ;) -kwag |
Re: New highly accurate prediction method reported by jorel!
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that is exactly what i already tried (see here: http://www.kvcd.net/forum/viewtopic....4614&start=129) Code:
had to reinstall my Windows (even manual repair failed) so i've only done 2 more tests, but i had an idea: I will try again with a SL of 72 tonight :D . |
For PAL (25fps) try 75, which is exactly 3*frame rate.
-kwag |
I tried this on a couple of encodes and still got 2-3% error. Can you post a screenshot of the ToK settings to use? Ta.
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Kwag and Jorel, please help me. :(
Look this TOK log from "Heaven": ================================================== =========== ToK Log: E:\HEAVEN\VIDEO_TS\NewScript25.avs ================================================== =========== Resolution (fps):704x480 (23,976 fps) Total Frames: 139897 Total Time : 01:37:15 ------------------------------------------------------------- Audio Size: 93.359.125 Required Video Size: 733.099.284 Factor: 59,940 Desired Sample Size: 12.230.551 ------------------------------------------------------------- New Faster Prediction ------------------------------------------------------------- Full Sample Next CQ: 70,000. Sample Size: 16.014.598 Small Sample Next CQ: 70,000. Sample Size: 1.581.155 Predicting... Next CQ: 53,460. Sample Size: 12.035.700 Next CQ: 58,000. Sample Size: 13.587.551 Next CQ: 54,880. Sample Size: 12.048.249 Next CQ: 55,845. Sample Size: 12.056.600 Next CQ: 56,506. Sample Size: 12.717.480 Next CQ: 56,097. Sample Size: 12.274.154 Exit Condition: 0,500 % reached ! yahoo ! Tries : 7 Final CQ: 56,097 Total Time For Predicition: 00:17:48 ------------------------------------------------------------- Encoding E:\HEAVEN\VIDEO_TS\NewScript25.avs ------------------------------------------------------------- Encoding... CQ : 56,097 Final Encoded Size: 684.997.229 Muxing ... Total Time (all operations): 04:47:37 Finished I don't understand Required Video Size: 733.099.284 Final Encoded Size: 684.997.229 :!: :evil: My settings: TOK 0.0.5.2 with Kwags video.en1 modified. Also, I changed the VBV Buffer Size to 60960 instead 0f 40960 (illegal floating zero trick). Prediction&Spacing: New Faster Prediction : checked Factor for Prediction : 1,01 Length of Sample : 24 (Auto checked !) Number of Samples / minute : 2 1st Group Precision % : 0,50 Speed Up by: 10 MPEG1 - VCD Any idea? LaBomba |
labomba my friend:
:) change the Length of Sample : 24 (Auto checked !) to :arrow: 72 :!: (uncheck Auto !) Number of Samples / minute : :arrow: 1 Factor for Prediction : :arrow: 1,00 see the first Kwag post! :wink: for vbv buffer size i'm in doubt ... :? seems too much! wait for the Kwag recomendations! :wink: |
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You have to uncheck Auto, and set your Length of sample to 3*FrameRate. Set number of samples per minute to 1. Now try it again :!: -kwag |
Would that make up on that 20-30mb or 0.30CQ difference :?: :mrgreen:
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I made a new try but BEFORE to read these last posts, so:
Factor REMAINS 1,01 and Samples/minute = 2 ================================================== =========== ToK Log: E:\HEAVEN\VIDEO_TS\NewScript25.avs ================================================== =========== Resolution (fps):704x480 (23,976 fps) Total Frames: 139897 Total Time : 01:37:15 ------------------------------------------------------------- Audio Size: 93.359.125 Required Video Size: 733.099.284 Factor: 19,980 Desired Sample Size: 36.691.657 ------------------------------------------------------------- New Faster Prediction ------------------------------------------------------------- Full Sample Next CQ: 70,000. Sample Size: 48.104.229 Small Sample Next CQ: 70,000. Sample Size: 4.761.502 Predicting... Next CQ: 53,393. Sample Size: 36.235.344 Next CQ: 57,864. Sample Size: 40.780.512 Next CQ: 54,735. Sample Size: 36.268.157 Next CQ: 55,664. Sample Size: 36.291.980 Next CQ: 56,312. Sample Size: 37.658.931 Next CQ: 55,921. Sample Size: 36.320.490 Next CQ: 56,073. Sample Size: 36.840.266 Exit Condition: 0,500 % reached ! yahoo ! Tries : 8 Final CQ: 56,073 Total Time For Predicition: 00:49:44 Total Time (all operations): 00:49:44 Finished Look: FINAL CQ: 56,073 , lower than the first try (56,097) :?: :?: :x Do you think that changing the Factor to 1.0 and the samples/minute to 2, will increase the Final CQ? LaBomba |
Hi LaBomba,
I don't know what's going on with your source :!: You're not encoding an AVI are you :roll: -kwag |
No Kwag.
I only use DVD material. I used ForceFilm in DVD2AVI (Film 98% Progressive). Used the optimal script from July 2th to AVS 2.52 My TMPGEnc is 2.513 Please Help LaBomba [/IMG] |
What movie are you encoding :?:
Edit: I see it's Heaven. What type of movie is that :?: -kwag |
Set number of samples per minute to 1 labomba.
search the prediction CQ again. in my system do a big difference! :wink: |
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Oh guys, sorry for the delay!
Here the last try, with all the changes (Samples/min = 1, Factor=1) Bingo :D :D :!: Audio Size: 93.359.125 Required Video Size: 725.840.875 Factor: 19,980 Desired Sample Size: 36.328.373 ------------------------------------------------------------- New Faster Prediction ------------------------------------------------------------- Full Sample Next CQ: 70,000. Sample Size: 46.664.520 Small Sample Next CQ: 70,000. Sample Size: 4.673.724 Predicting... Next CQ: 54,495. Sample Size: 35.417.417 Next CQ: 58,999. Sample Size: 39.851.997 Next CQ: 56,084. Sample Size: 35.983.535 Next CQ: 56,943. Sample Size: 38.331.786 Next CQ: 56,361. Sample Size: 36.823.666 Next CQ: 56,210. Sample Size: 36.369.733 Exit Condition: 0,500 % reached ! yahoo ! Tries : 7 Final CQ: 56,210 Total Time For Predicition: 23:31:36 Total Time (all operations): 23:31:36 Finished The CQ increased from 56,073 to 56,210 :!: A little bit low CQ yet, but I'm trying a 97min. movie, some dark but also with low action, with 704x480 resolution, 1 CD80min, 128k audio!!! :twisted: Madness ??! Really NO !! I can testify, with the second last script of July 2th, and the old CQ (56,073), I had very little gibbs. Now, let me try the newest script and the newest prediction method. Thanks a lot, guys. LaBomba |
Well im not sure this method more accurate than the other but correct me if im run chainge the sampler rate fron 24 to 72 for NTSC film here is my tok lod:
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Well im not sure this method more accurate than the other but correct me if im run chainge the sampler rate fron 24 to 72 for NTSC film here is my tok log:
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Question: does this method work for fast prediction or full prediction only? Also, is it accurate at other factors for prediction? I ask because I like to make my muxed videos to be ~815mb since I can overburn on my discs. Lets me squeeze a bit more CQ in my videos, you know? So for that I usually set my factor a bit higher, to 1.01 or 1.02.
Also, is it recommended to change # of samples/min to 2 if the total movie length is less than 100min? I have heard that prediction accuracy is best when you can make at least 100 samples per movie, so if my film is only 90 minutes long I predict with 2 samples/min. |
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-kwag |
Kwag / Jorel, thanks for making things even better for us.
Could you confirm if these settings OK then for PAL? New faster Prediciton: Unchecked Check Pass: Unchecked Precision: 0.5% Speed up by: 10 times Factor for Prediction: 1.00 Length of Sample: 75 Number of Samples: 1 For > 100mins 2nd Group of Passes: Unchecked GOP parameters: 1, 5823, 2, 1, 24 Much appreciated. ozjeff99 |
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