Prediction with CQ VBR?
 

Ok here is the thing i want to experiment with CQ_VBR and low Resolution, Now my :?: is manual prediction is accurate with CQ_VBR :?: I know that the video ini on tok to VBR_Auto will change tok to use that mode, but dont know what to do to chainge the Max n min. bitrate and the CQ_VBR from 100% to a lower value. Any clues anyone :?:

Hi ovg64,

Try this, with either CQ or CQ_VBR on :arrow: KVCDx3 528x480.
(1) Set the MAX bitrate to 2,000Kbps ( No need for a higher value if you are using the MA script. )
(2) Set your MIN bitrate to 50% of average bitrate required ( look it up in MovieStacker ). If 50% is below 300Kbps, then leave it at 300Kbps
(3) Now run prediction, and see how close your end result is ;)

Try to use "Full" prediction, instead of "Fast" prediction.
Let me know your results ( I'll explain the details later, when I'm done ;) )

-kwag

OK, used Tmpeg 2.58
Full prediction (loooong)
max. 2000 kbits/sec.
min. 945 kbits/sec. (50% of average 1889)
tok logs

Quote:

================================================== =========== ToK Log: C:\ ================================================== =========== Resolution (fps):528x480 (23.976 fps) Total Frames: 157902 Total Time : 01:49:46 ------------------------------------------------------------- Audio Size: 92,204,000 Required Video Size: 726,996,000 Factor: 59.940 Desired Sample Size: 12,128,729 ------------------------------------------------------------- Prediction: 1st Group of Passes ------------------------------------------------------------- Next CQ: 70.000. Sample Size: 17,086,702 Next CQ: 49.688. Sample Size: 15,988,086 Next CQ: 31.640. Sample Size: 15,824,335 Next CQ: 20.402. Sample Size: 15,774,644 Next CQ: 13.309. Sample Size: 15,759,276 Next CQ: 8.814. Sample Size: 15,756,762 Next CQ: 5.961. Sample Size: 15,754,576 Next CQ: 4.150. Sample Size: 15,753,025 Next CQ: 3.000. Sample Size: 15,751,531 Next CQ: 2.270. Sample Size: 15,751,643 Break. Cause: Decreasing curve. idx = 10. Sample Size: 15,751,513 Next CQ: 1.806. Sample Size: 15,746,404 Next CQ: 1.512. Sample Size: 15,747,390 Break. Cause: Decreasing curve. idx = 12. Sample Size: 15,749,019 Break. Cause: Decreasing curve. idx = 12. Sample Size: 15,749,019 Correction . Official formula used. Cause: DeltaSize=0 Next CQ: 1.071. Sample Size: 15,744,983 Next CQ: 1.045. Sample Size: 15,752,764 Break. Cause: Decreasing curve. idx = 14. Sample Size: 15,748,523 NextCQ: 0.889. Corrected CQ: 0.912 Next CQ: 0.912. Sample Size: 15,749,542 NextCQ: 0.889. Corrected CQ: 0.912 Exit Condition: CQ diferential = 0 Tries : 15 Final CQ: 0.912 Total Time For Predicition: 01:56:33 Total Time (all operations): 01:56:33 Finished

NO WAY average 1889 8O
There's no way you get an average of 1886Kbps for a movie of 01:49:46 on one CD :!:
Check your settings again.

-kwag

Moviestacker 1st tap
Video Stream
Average kbps> 1889

1889/2=944.5 ~ 945 this is what i used :roll:

Edit: Dammmmm shhhh had it for 2 CDs no wonder :x

Average kbps 888/2 = 444 kbps Sounds better :?: :lol:

let u know later homes :!:

That's exactly what I thought :mrgreen: Exactly :cool:

-kwag

k there u go should had started at 60% :ideasmiley: now i forgot what i was doing this for :)

I pm the results kwag; and answering my own :?: i was able to make tok to do prediction with CQ_VBR by chainging the following lines in the video ini,


*Job.MPEG.Video.RateControlMode=MPEGVideoEncoder_R ateControlMode_VBR_Auto
*Job.MPEG.Video.AVBR_Quality=60
*Job.MPEG.Video.AVBR_MaxBitRate=2000000
*Job.MPEG.Video.AVBR_MinBitRate=300000

I couldn't get tok to chainge the bitrate using the tap so i made the chainge straigh at the video ini. now i want to experiment with some
352x resolutions. :wink:

EDIT: dont bother with what i post above, tok just hangs at 60%.... :mrgreen: