Bitrates: Testing CQmatic Versions

Avalon · #1 07-22-2003, 02:41 PM

I think there should be a thread where we all collect the results of Our testings.

I think this is the best way to post this:

Code:

===============================================
Version of CQ Matic:  0.92 beta 2a
===============================================

Title of Movie: Tomb Raider

Length of Movie: 97 (97,22 Min)

Resolution: 704x576

Type: PAL

MPEG: MPEG 2

Audio Bitrate: 128 Stereo CBR ( Audio2: 128 St. CBR)

Average Bitrate: 870 (Info by Moviestacker 2.0.0 beta 3)

Project: d2v, AVS (MA-Script), tpr

Wanted Size (Video+Audio): 800 MB / 80 Min

===============================================

===============================================
Results:
===============================================

CQMatic: CQ 48,15

Final Size Video only: ( 8o% finished: 451 MB restarting test with 1.00 beta1)

Final Size Total: ( I post this 2morrow)

My girlfriend cutted of the power yesterday....

So I 've to start again...

kwag · #2 07-22-2003, 02:46 PM

Quote:

Originally Posted by Avalon

Wanted Size: 800 MB

I assume that's for a 90 minute CD-R (800MB + Audio

)

-kwag

Krassi · #3 07-22-2003, 03:32 PM

Hi Kwag,

sorry for posting so late. Been very busy last days

.

I've just predicted a movie with ToK and CQMatic 0.92 b2a.
Movie details: PAL, 114 minutes, Average Bitrate 851

Code:

ToK-Prediction:
Audio Size: 95.621.486
Required Video Size: 723.578.514
 
Factor: 31,250
Desired Sample Size: 23.154.512
 
-------------------------------------------------------------
Prediction: 1st Group of Passes
-------------------------------------------------------------
 
Next CQ: 55,000. Sample Size: 25.572.429
Next CQ: 49,800. Sample Size: 23.338.515
Next CQ: 37,407. Sample Size: 20.560.115
Next CQ: 46,291. Sample Size: 23.624.198
Next CQ: 43,776. Sample Size: 21.845.296
Next CQ: 45,507. Sample Size: 23.150.099

Exit Condition: 0,500 % reached ! yahoo !
Tries   : 6
 
Final CQ: 45,507

Code:

CQMatic: CQ of 49,38

I'm doing a full encoding right now, results in about 10 hours.

Thanks Kwag for developing this tool

Avalon · #4 07-22-2003, 03:42 PM

@krassi a little bit less information about Your movie...

... but it is ok!

Avalon · #5 07-22-2003, 11:03 PM

Code:

===============================================
Version of CQ Matic:  1.00 beta 1
===============================================

Title of Movie: Tomb Raider

Length of Movie: 97 (97,22 Min)

Resolution: 704x576

Type: PAL

MPEG: MPEG 2

Audio Bitrate: 128 Stereo CBR ( Audio2: 128 St. CBR)

Average Bitrate: 870 (Info by Moviestacker 2.0.0 beta 3)

Project: d2v, AVS (MA-Script), tpr

Wanted Size (Video+Audio): 800 MB / 80 Min

===============================================

===============================================
Results:
===============================================

CQMatic: (CQ 48,15)

Final Size Video only: (574,599 MB)
Final Size Total: (765 MB)

Krassi · #6 07-23-2003, 12:29 AM

Quote:

Originally Posted by Krassi

I'm doing a full encoding right now, results in about 10 hours.

Wanted video filesize by Moviestacker: 704 MB
Final size with CQ=49,38: 624 MB.

kwag · #7 07-23-2003, 12:32 AM

Quote:

Originally Posted by Krassi

Quote:

Originally Posted by Krassi

I'm doing a full encoding right now, results in about 10 hours.

Wanted video filesize by Moviestacker: 704 MB
Final size with CQ=49,38: 624 MB.

Hi Krassi,

Try version 1.0 and see if you get a higher CQ

Please tell me what you get. Just run prediction only.

-kwag

Krassi · #8 07-23-2003, 01:37 AM

Quote:

Originally Posted by kwag

Try version 1.0 and see if you get a higher CQ

Please tell me what you get. Just run prediction only.

Yep, i'll do this this evening.
The funny thing is that ToK-Prediction was even worse. Thats first time ToK was so way off... I'll try another movie tonight where i already know a right CQ...
Has the problem with short movies been solved?

kwag · #9 07-23-2003, 02:04 AM

Quote:

Originally Posted by Krassi

The funny thing is that ToK-Prediction was even worse. Thats first time ToK was so way off... I'll try another movie tonight where i already know a right CQ...
Has the problem with short movies been solved?

How off was the CQ in ToK compared to CQMatic

And the problem with short movies should now be solved with Version 1.0

-kwag

Krassi · #10 07-23-2003, 02:09 AM

ToK predicted a CQ of 45,507 (see above post).
But i've done only a short sampler with ToK. This morning i started a new prediction with ToK with a bigger sample size. Maybe then its more accurate.

I'll try now with a shorter movie (i have one @work) and newest CQMatic.

.

Krassi · #11 07-23-2003, 07:30 AM

Short movie results (23 minutes):
Wanted size: 188.61 MB
Final size: 161 MB
I think thats not bad for such a short movie

This evening i'll make a test with a longer movie.

@Kwag:
Can you explain me (shortly) how your prediction algorithm works

Or is it the one from the "File prediction experiment #1,000,000

" -Thread

Just curious

tigger · #12 07-23-2003, 07:35 AM

hi kwag me again

testing new cqmatic version :

black knight (91 min)

predicted a cq of 66,81

well lets see whats coming out

Krassi · #13 07-23-2003, 10:33 AM

Quote:

Originally Posted by Krassi

Short movie results (23 minutes):
Wanted size: 188.61 MB
Final size: 161 MB

Quote:

CQMatic-CQ: 51.01

Compared with ToKs result:

Quote:

Required Video Size: 197,771,919 Bytes
Encoding... CQ : 51.091
Final Encoded Size: 186,167,838 Bytes

kwag · #14 07-23-2003, 11:29 AM

Quote:

Originally Posted by Krassi

Quote:

Originally Posted by Krassi

Short movie results (23 minutes):
Wanted size: 188.61 MB
Final size: 161 MB

Quote:

CQMatic-CQ: 51.01

Compared with ToKs result:

Quote:

Required Video Size: 197,771,919 Bytes
Encoding... CQ : 51.091
Final Encoded Size: 186,167,838 Bytes

Hi Krassi,
Take a look at the "Wanted" size in moviestacker for both encodes, and compare that to the size created by CQMatic and ToK. (Not the wanted from ToK's log )

-kwag

Krassi · #15 07-23-2003, 11:31 AM

Hi Kwag,
filesize in Moviestacker was 188.61 MB for both.

kwag · #16 07-23-2003, 12:14 PM

Quote:

Originally Posted by Krassi

Hi Kwag,
filesize in Moviestacker was 188.61 MB for both.

Ok, so it seems I'm under target. Not much, but it's still below. I just need to find out if it's the same behaviour for everyone. If not, then I have to go into another file prediction method.
However, black prince reported an extremely accurate encode with a movie, so if this is the worse case scenario ( minus ~15MB to minus ~17MB ), then I won't touch prediction

That means that our encodes will be from ~exact size to a max of ~-17MB, and I would call that a very good prediction

I'd rather have that range, than some +20MB over the limit encodes.
I do have the prediction percent bracket in CQMatic set to -1% and +0.5% for a max range of 1.5% difference. This way, if my sample calculation is over the internal reference wanted sample, we ensure that the file size will not be that much larger than the wanted size.

-kwag

Krassi · #17 07-23-2003, 12:19 PM

I think with that small sample size this is really good

I've configured ToK to take a bigger sample size...
I'm doing a full encode right now.

Avalon · #18 07-23-2003, 12:46 PM

Im my case it was 35 MB under it!!!!

Quote:

Final Size Total: (765 MB), Wanted: 800 MB

Krassi · #19 07-23-2003, 03:25 PM

Version 1.0 beta3:
Same movie as before (23 mins).
Wanted filesize: 188.61 MB
Encoded filesize: 170 MB

We're getting closer

.

kwag · #20 07-23-2003, 03:31 PM

Quote:

Originally Posted by Krassi

Version 1.0 beta3:
Same movie as before (23 mins).
Wanted filesize: 188.61 MB
Encoded filesize: 170 MB

We're getting closer

.

Yesssss

That's VERY reasonable for the low side. Now I have to confirm that the "High" side is not too over the "Wanted" size. I'll encode K-Pax, whick was always over the size with ToK and the manual predictions with Sampler() or SelectRangeEvery() functions

-kwag