Oversized movie with XviD-04112002-1 build

[Pasqui]

Hi,
with this new build, my movie just gets oversized :(
Here is my config:
u]Settings for XviD (04/11/2002 13:01:54)[/u]
Mode: 2 Pass - 1st pass
Discard 1st Pass: ON
Motion Search Precision: 6 - Ultra
Quantization Type: MPEG
FourCC Used: XVID
Max I-frame Interval: 300, Min I-frame Interval: 1
Lumimasking: OFF
Interlacing: OFF
Greyscale: OFF
B-frames: Disabled
Min I-frame Quantizer: 2, Max I-frame Quantizer: 6
Min P-frame Quantizer: 2, Max P-frame Quantizer: 16
Max Bitrate: 10000kbps, Max Overflow Improvement: 60%, Max Overflow Degradation: 60%
Start Credits: OFF, End Credits: 171566-186214
Encode credits in greyscale: OFF
Credits Rate Reduction: 20%,

Settings for XviD (04/11/2002 13:01:54)
Mode: 2 Pass - 2nd pass Int.
Dummy 2nd Pass: OFF
Desired Size: 637261KB
I-frame Boost: 0%
Below I-frame Distance: 10%
I-frame Bitrate Reduction: 30%
Curve Compression: Payback with Bias, Bitrate Payback Delay: 250frames
High Bitrate Scenes: 0%, Low Bitrate Scenes: 0%
Hinted Motion Estimation: OFF
Alternative Curve System: OFF,
Motion Search Precision: 6 - Ultra
FourCC Used: XVID
Max I-frame Interval: 300, Min I-frame Interval: 1
Lumimasking: OFF
Interlacing: OFF
Greyscale: OFF
B-frames: Disabled
Min I-frame Quantizer: 2, Max I-frame Quantizer: 6
Min P-frame Quantizer: 2, Max P-frame Quantizer: 16
Max Bitrate: 10000kbps, Max Overflow Improvement: 60%, Max Overflow Degradation: 60%
Start Credits: OFF, End Credits: 171566-186214
Encode credits in greyscale: OFF
Credits Rate Reduction: 20%,

No GMC, no quaterpel and no chroma ME used

XviD Analyzer v0.16 by MoonWalker & MarcFD
e-mails : s_ilias@gmx.net & marc.fd@libertysurf.fr


Quantizers Analisis
---------------------

Quantizers Used For Movie :
------------------------------
Quant 2 Used : 73 Times, Percentage Used : 0.04%
Quant 3 Used : 320 Times, Percentage Used : 0.19%
Quant 4 Used : 25324 Times, Percentage Used : 14.76%
Quant 5 Used : 89266 Times, Percentage Used : 52.03%
Quant 6 Used : 52278 Times, Percentage Used : 30.47%
Quant 7 Used : 4142 Times, Percentage Used : 2.41%
Quant 8 Used : 86 Times, Percentage Used : 0.05%
Quant 9 Used : 9 Times, Percentage Used : 0.01%
Quant 10 Used : 15 Times, Percentage Used : 0.01%
Quant 11 Used : 2 Times, Percentage Used : 0.00%
Quant 12 Used : 8 Times, Percentage Used : 0.00%
Quant 13 Used : 1 Times, Percentage Used : 0.00%
Quant 14 Used : 5 Times, Percentage Used : 0.00%
Quant 15 Used : 18 Times, Percentage Used : 0.01%
Quant 16 Used : 19 Times, Percentage Used : 0.01%

Average Quantizer Used for Movie : 5.206

Quantizers Used For Credits :
--------------------------------
Quant 2 Used : 243 Times.
Quant 3 Used : 53 Times.
Quant 4 Used : 28 Times.
Quant 5 Used : 18 Times.
Quant 6 Used : 14 Times.
Quant 7 Used : 7 Times.
Quant 8 Used : 8 Times.
Quant 9 Used : 13 Times.
Quant 10 Used : 19 Times.
Quant 11 Used : 15 Times.
Quant 12 Used : 14 Times.
Quant 13 Used : 16 Times.
Quant 14 Used : 24 Times.
Quant 15 Used : 21 Times.
Quant 16 Used : 27 Times.
Quant 17 Used : 31 Times.
Quant 18 Used : 27 Times.
Quant 19 Used : 43 Times.
Quant 20 Used : 24 Times.
Quant 21 Used : 42 Times.
Quant 22 Used : 43 Times.
Quant 23 Used : 37 Times.
Quant 24 Used : 42 Times.
Quant 25 Used : 47 Times.
Quant 26 Used : 42 Times.
Quant 27 Used : 47 Times.
Quant 28 Used : 46 Times.
Quant 29 Used : 59 Times.
Quant 30 Used : 54 Times.
Quant 31 Used : 13544 Times.

MPEG Quantization Type Used 185821 timed, Percentage Used : 99.79%

Quantizers prevented from rising too steeply 62 times


Intra-Frame (Key-Frame) Quantizers
------------------------------------

Movie
-------
Quant 2 Used : 1 Times, Percentage Used : 0.03%
Quant 6 Used : 3095 Times, Percentage Used : 98.41%

Credits
---------
Quant 3 Used : 2 Times, Percentage Used : 0.06%
Quant 4 Used : 1 Times, Percentage Used : 0.03%
Quant 5 Used : 1 Times, Percentage Used : 0.03%
Quant 6 Used : 1 Times, Percentage Used : 0.03%
Quant 8 Used : 3 Times, Percentage Used : 0.10%
Quant 9 Used : 2 Times, Percentage Used : 0.06%
Quant 10 Used : 3 Times, Percentage Used : 0.10%
Quant 11 Used : 1 Times, Percentage Used : 0.03%
Quant 13 Used : 2 Times, Percentage Used : 0.06%
Quant 14 Used : 1 Times, Percentage Used : 0.03%
Quant 18 Used : 1 Times, Percentage Used : 0.03%
Quant 19 Used : 1 Times, Percentage Used : 0.03%
Quant 22 Used : 1 Times, Percentage Used : 0.03%
Quant 24 Used : 2 Times, Percentage Used : 0.06%
Quant 25 Used : 1 Times, Percentage Used : 0.03%
Quant 26 Used : 1 Times, Percentage Used : 0.03%
Quant 27 Used : 1 Times, Percentage Used : 0.03%
Quant 29 Used : 1 Times, Percentage Used : 0.03%
Quant 31 Used : 23 Times, Percentage Used : 0.73%

Inter-Frame (P-Frame) Quantizers
------------------------------------

Movie
-------
Quant 2 Used : 72 Times, Percentage Used : 0.04%
Quant 3 Used : 320 Times, Percentage Used : 0.17%
Quant 4 Used : 25324 Times, Percentage Used : 13.83%
Quant 5 Used : 89266 Times, Percentage Used : 48.76%
Quant 6 Used : 49183 Times, Percentage Used : 26.87%
Quant 7 Used : 4142 Times, Percentage Used : 2.26%
Quant 8 Used : 86 Times, Percentage Used : 0.05%
Quant 9 Used : 9 Times, Percentage Used : 0.00%
Quant 10 Used : 15 Times, Percentage Used : 0.01%
Quant 11 Used : 2 Times, Percentage Used : 0.00%
Quant 12 Used : 8 Times, Percentage Used : 0.00%
Quant 13 Used : 1 Times, Percentage Used : 0.00%
Quant 14 Used : 5 Times, Percentage Used : 0.00%
Quant 15 Used : 18 Times, Percentage Used : 0.01%
Quant 16 Used : 19 Times, Percentage Used : 0.01%

Credits
---------
Quant 2 Used : 243 Times, Percentage Used : 0.13%
Quant 3 Used : 51 Times, Percentage Used : 0.03%
Quant 4 Used : 27 Times, Percentage Used : 0.01%
Quant 5 Used : 17 Times, Percentage Used : 0.01%
Quant 6 Used : 13 Times, Percentage Used : 0.01%
Quant 7 Used : 7 Times, Percentage Used : 0.00%
Quant 8 Used : 5 Times, Percentage Used : 0.00%
Quant 9 Used : 11 Times, Percentage Used : 0.01%
Quant 10 Used : 16 Times, Percentage Used : 0.01%
Quant 11 Used : 14 Times, Percentage Used : 0.01%
Quant 12 Used : 14 Times, Percentage Used : 0.01%
Quant 13 Used : 14 Times, Percentage Used : 0.01%
Quant 14 Used : 23 Times, Percentage Used : 0.01%
Quant 15 Used : 21 Times, Percentage Used : 0.01%
Quant 16 Used : 27 Times, Percentage Used : 0.01%
Quant 17 Used : 31 Times, Percentage Used : 0.02%
Quant 18 Used : 26 Times, Percentage Used : 0.01%
Quant 19 Used : 42 Times, Percentage Used : 0.02%
Quant 20 Used : 24 Times, Percentage Used : 0.01%
Quant 21 Used : 42 Times, Percentage Used : 0.02%
Quant 22 Used : 42 Times, Percentage Used : 0.02%
Quant 23 Used : 37 Times, Percentage Used : 0.02%
Quant 24 Used : 40 Times, Percentage Used : 0.02%
Quant 25 Used : 46 Times, Percentage Used : 0.03%
Quant 26 Used : 41 Times, Percentage Used : 0.02%
Quant 27 Used : 46 Times, Percentage Used : 0.03%
Quant 28 Used : 46 Times, Percentage Used : 0.03%
Quant 29 Used : 58 Times, Percentage Used : 0.03%
Quant 30 Used : 54 Times, Percentage Used : 0.03%
Quant 31 Used : 13521 Times, Percentage Used : 7.39%



Frame Analisis
----------------

Number Of Intra-Frames (Key-Frames) : 3145
Number Of Inter-Frames (P-Frames) : 183069
Total Number Of Frames : 186214

1.69% of the Movie is Intra-Frames (Key-Frames)
98.31% of the Movie is Inter-Frames (P-Frames)



Size Analysis
----------------

1-Pass Size : 2181637806 Bytes or 2130505 KBytes or 2080 MBytes
Scaled Size : 648084256 Bytes or 632894 KBytes or 618 MBytes
Actual Size : 658101379 Bytes or 642677 KBytes or 627 MBytes
Actual Size of Avi File without Sound : 662671360 Bytes or 647140 KBytes or 631 MBytes

Usefull Statistics
------------------
Compressibility : -31.14%
Relative Quality of XviD avi : 38.42%
Absolute Quality of XviD avi : 90.38%

AVS script:
LoadPlugin("C:\DVD\AviSynth2\PluginsAVS25\mpeg2dec3 YV12.dll")
LoadPlugin("C:\DVD\AviSynth2\PluginsAVS25\UnDot.dll")
mpeg2source("E:\Starship Troopers\Starship Troopers.d2v",lumoff=-2,blend=false)
crop(6,9,707,455)
UnDot()
BicubicResize(512,272,0,0.5)

This is NOT a problem with YV12 as I get the same result with a classic YUY2 input. And it it is not a problem of compressibility as I previously compressed this movie with those parameters without any problem.

Does anyone also experience problems with credits encoding ?

Pasqui.

[Koepi]

The credits settings are the problem, 20% aren't reachable. Try using fixed quantizers.

Regards,
Koepi

[Pasqui]

Funny stuff...
I never had a problem with this movie and a credit rate reduction of 20% before.
I will try with another movie to check if this specific movie was responsible or if it is an issue with credit rate reduction.
Could new sysKin's I/P/B decision stuff be responsible for this (I mean a slightly different bitrate distribution resulting in a problem with credit encoding at 20%) ?

Thanks in advance,

Pasqui.

[sysKin]

Can anyone confirm that high quants work wrong? Or worse then before?

I was a bit too lazy to check them with my recent ME changes. Come to think of it, they _might_ be wrong now :/

I'd check it myself, but I don't have the older version to compare - and no experience in encoding to guess at all ;)

Radek

[droolian01]

Hi there.
I have to report this problem with the stable 0410 2002 version as well. heres the background.

Using dvb-t card to capture 'band of brothers -ep 2 day of days' and somehow during cutting/converting to pva i lost about 10 mins in the middle and deleted the source!!!(3 undelete/recovery programs confirmed it was gone!!!arghhh). So spent ALL day splicing a vcd version off kazaa into this mess and after encoding got over 500mb video instead of 290mb aim. Then did each part separately and first 2 parts were bang on but the 3rd part (with credit rate reduction at 20%) was oversized again.

i have never had any probs before using rate reduction at 20%. I have been messing with the unstable builds so i uninstalled xvid, ran easycleaner, reinstalled and used reset, then put back my ussual settings - still oversized credits.

I'm definitely using the 4 october 2002 stable build, so is there some registry setting hanging over from using the unstable build? I'm not a programmer so just guessing here. I'll used fixed quant for credits from now on but this needs investigating.

Thanks

p.s. i can post my settings if you want but i don't think its relevent (pretty usual stuff) it seems to be '20% credit reduction' related.

[Pasqui]

Hi redid this encode with those parameters:
Settings for XviD (04/11/2002 13:01:54)
Mode: 2 Pass - 2nd pass Int.
Dummy 2nd Pass: OFF
Desired Size: 637261KB
I-frame Boost: 0%
Below I-frame Distance: 10%
I-frame Bitrate Reduction: 30%
Curve Compression: Payback with Bias, Bitrate Payback Delay: 250frames
High Bitrate Scenes: 0%, Low Bitrate Scenes: 0%
Hinted Motion Estimation: OFF
Alternative Curve System: OFF,
Motion Search Precision: 6 - Ultra
Quantization Type: New Modulated HQ
FourCC Used: XVID
Max I-frame Interval: 300, Min I-frame Interval: 1
Lumimasking: OFF
Interlacing: OFF
Greyscale: OFF
QPel: OFF
GMC: OFF
Chroma ME: OFF
B-frames: Disabled
Min I-frame Quantizer: 2, Max I-frame Quantizer: 31
Min P-frame Quantizer: 2, Max P-frame Quantizer: 31
Max Bitrate: 10000kbps, Max Overflow Improvement: 60%, Max Overflow Degradation: 60%
Start Credits: OFF, End Credits: 171566-186214
Encode credits in greyscale: OFF
Credits Rate Reduction: 15%,

XviD Analyzer v0.16 by MoonWalker & MarcFD
e-mails : s_ilias@gmx.net & marc.fd@libertysurf.fr


Quantizers Analisis
---------------------

Quantizers Used For Movie :
------------------------------
Quant 2 Used : 83 Times, Percentage Used : 0.05%
Quant 3 Used : 425 Times, Percentage Used : 0.25%
Quant 4 Used : 26698 Times, Percentage Used : 15.56%
Quant 5 Used : 90716 Times, Percentage Used : 52.88%
Quant 6 Used : 49214 Times, Percentage Used : 28.69%
Quant 7 Used : 3575 Times, Percentage Used : 2.08%
Quant 8 Used : 850 Times, Percentage Used : 0.50%
Quant 9 Used : 2 Times, Percentage Used : 0.00%
Quant 10 Used : 2 Times, Percentage Used : 0.00%
Quant 12 Used : 1 Times, Percentage Used : 0.00%

Average Quantizer Used for Movie : 5.182

Quantizers Used For Credits :
--------------------------------
Quant 2 Used : 243 Times.
Quant 3 Used : 53 Times.
Quant 4 Used : 28 Times.
Quant 5 Used : 18 Times.
Quant 6 Used : 14 Times.
Quant 7 Used : 7 Times.
Quant 8 Used : 8 Times.
Quant 9 Used : 13 Times.
Quant 10 Used : 19 Times.
Quant 11 Used : 15 Times.
Quant 12 Used : 14 Times.
Quant 13 Used : 16 Times.
Quant 14 Used : 24 Times.
Quant 15 Used : 21 Times.
Quant 16 Used : 27 Times.
Quant 17 Used : 31 Times.
Quant 18 Used : 27 Times.
Quant 19 Used : 43 Times.
Quant 20 Used : 24 Times.
Quant 21 Used : 42 Times.
Quant 22 Used : 43 Times.
Quant 23 Used : 37 Times.
Quant 24 Used : 42 Times.
Quant 25 Used : 47 Times.
Quant 26 Used : 42 Times.
Quant 27 Used : 47 Times.
Quant 28 Used : 46 Times.
Quant 29 Used : 52 Times.
Quant 30 Used : 41 Times.
Quant 31 Used : 13564 Times.

MPEG Quantization Type Used 185706 timed, Percentage Used : 99.73%

Quantizers prevented from rising too steeply 109 times


Intra-Frame (Key-Frame) Quantizers
------------------------------------

Movie
-------
Quant 2 Used : 1 Times, Percentage Used : 0.03%
Quant 6 Used : 2169 Times, Percentage Used : 68.97%
Quant 7 Used : 95 Times, Percentage Used : 3.02%
Quant 8 Used : 831 Times, Percentage Used : 26.42%

Credits
---------
Quant 3 Used : 2 Times, Percentage Used : 0.06%
Quant 4 Used : 1 Times, Percentage Used : 0.03%
Quant 5 Used : 1 Times, Percentage Used : 0.03%
Quant 6 Used : 1 Times, Percentage Used : 0.03%
Quant 8 Used : 3 Times, Percentage Used : 0.10%
Quant 9 Used : 2 Times, Percentage Used : 0.06%
Quant 10 Used : 3 Times, Percentage Used : 0.10%
Quant 11 Used : 1 Times, Percentage Used : 0.03%
Quant 13 Used : 2 Times, Percentage Used : 0.06%
Quant 14 Used : 1 Times, Percentage Used : 0.03%
Quant 18 Used : 1 Times, Percentage Used : 0.03%
Quant 19 Used : 1 Times, Percentage Used : 0.03%
Quant 22 Used : 1 Times, Percentage Used : 0.03%
Quant 24 Used : 2 Times, Percentage Used : 0.06%
Quant 25 Used : 1 Times, Percentage Used : 0.03%
Quant 26 Used : 1 Times, Percentage Used : 0.03%
Quant 27 Used : 1 Times, Percentage Used : 0.03%
Quant 29 Used : 1 Times, Percentage Used : 0.03%
Quant 31 Used : 23 Times, Percentage Used : 0.73%

Inter-Frame (P-Frame) Quantizers
------------------------------------

Movie
-------
Quant 2 Used : 82 Times, Percentage Used : 0.04%
Quant 3 Used : 425 Times, Percentage Used : 0.23%
Quant 4 Used : 26698 Times, Percentage Used : 14.58%
Quant 5 Used : 90716 Times, Percentage Used : 49.55%
Quant 6 Used : 47045 Times, Percentage Used : 25.70%
Quant 7 Used : 3480 Times, Percentage Used : 1.90%
Quant 8 Used : 19 Times, Percentage Used : 0.01%
Quant 9 Used : 2 Times, Percentage Used : 0.00%
Quant 10 Used : 2 Times, Percentage Used : 0.00%
Quant 12 Used : 1 Times, Percentage Used : 0.00%

Credits
---------
Quant 2 Used : 243 Times, Percentage Used : 0.13%
Quant 3 Used : 51 Times, Percentage Used : 0.03%
Quant 4 Used : 27 Times, Percentage Used : 0.01%
Quant 5 Used : 17 Times, Percentage Used : 0.01%
Quant 6 Used : 13 Times, Percentage Used : 0.01%
Quant 7 Used : 7 Times, Percentage Used : 0.00%
Quant 8 Used : 5 Times, Percentage Used : 0.00%
Quant 9 Used : 11 Times, Percentage Used : 0.01%
Quant 10 Used : 16 Times, Percentage Used : 0.01%
Quant 11 Used : 14 Times, Percentage Used : 0.01%
Quant 12 Used : 14 Times, Percentage Used : 0.01%
Quant 13 Used : 14 Times, Percentage Used : 0.01%
Quant 14 Used : 23 Times, Percentage Used : 0.01%
Quant 15 Used : 21 Times, Percentage Used : 0.01%
Quant 16 Used : 27 Times, Percentage Used : 0.01%
Quant 17 Used : 31 Times, Percentage Used : 0.02%
Quant 18 Used : 26 Times, Percentage Used : 0.01%
Quant 19 Used : 42 Times, Percentage Used : 0.02%
Quant 20 Used : 24 Times, Percentage Used : 0.01%
Quant 21 Used : 42 Times, Percentage Used : 0.02%
Quant 22 Used : 42 Times, Percentage Used : 0.02%
Quant 23 Used : 37 Times, Percentage Used : 0.02%
Quant 24 Used : 40 Times, Percentage Used : 0.02%
Quant 25 Used : 46 Times, Percentage Used : 0.03%
Quant 26 Used : 41 Times, Percentage Used : 0.02%
Quant 27 Used : 46 Times, Percentage Used : 0.03%
Quant 28 Used : 46 Times, Percentage Used : 0.03%
Quant 29 Used : 51 Times, Percentage Used : 0.03%
Quant 30 Used : 41 Times, Percentage Used : 0.02%
Quant 31 Used : 13541 Times, Percentage Used : 7.40%



Frame Analisis
----------------

Number Of Intra-Frames (Key-Frames) : 3145
Number Of Inter-Frames (P-Frames) : 183069
Total Number Of Frames : 186214

1.69% of the Movie is Intra-Frames (Key-Frames)
98.31% of the Movie is Inter-Frames (P-Frames)



Size Analysis
----------------

1-Pass Size : 2181637806 Bytes or 2130505 KBytes or 2080 MBytes
Scaled Size : 648084178 Bytes or 632894 KBytes or 618 MBytes
Actual Size : 661106188 Bytes or 645611 KBytes or 630 MBytes
Actual Size of Avi File without Sound : 665675776 Bytes or 650074 KBytes or 634 MBytes

Usefull Statistics
------------------
Compressibility : -31.28%
Relative Quality of XviD avi : 38.60%
Absolute Quality of XviD avi : 90.46%

I get almost the same size with a range of 2-31 for quantizers. Now I really think there is a problem... What do you think Koepi ?

[Koepi]

As I wrote: it's your credits settings.

Use at least 30% (or 40%) or better fixed quant setting.

15% isn't reachable if 20% of the movie bitrate aren't reachable, that's usually the logical explanation - in this example, you made it even worse by requesting a even higher compression.

Regards
Koepi

[Pasqui]

Ok, I'll try and keep you informed

[droolian01]

hi again.

I just repeated an encode but this time had no special treatment for credits (no reduction at all) for both passes and got a final vid size of 536 mb when the aim was 290 mb. This was using Koepi's 04102002 stable build.

I've never had any trouble before so it makes me think i have screwwed something up on my system big time. I have to do a capture in 2 hours time and will not have enough time to do a re-encode, i've got to clear some hd space somehow, i have people on usenet waiting for this capture too!!!ARRGGHHH why do things allways go wrong at times like these!!!!

Mode: 2 Pass - 1st pass
Discard 1st Pass: ON
Motion Search Precision: 6 - Ultra
Quantization Type: MPEG
FourCC Used: XVID
Max I-frame Interval: 125, Min I-frame Interval: 1
Lumimasking: OFF
Interlacing: OFF
Greyscale: OFF
Max Bitrate: 10000kbps, Max Overflow Improvement: 60%, Max Overflow Start Credits: OFF, End Credits: off
Encode credits in greyscale: OFF


Mode: 2 Pass - 2nd pass Int.
Dummy 2nd Pass: OFF
Desired Size: 290000KB
I-frame Boost: 10%
Below I-frame Distance: 8%
I-frame Bitrate Reduction: 50%
Curve Compression: Payback with Bias, Bitrate Payback Delay: 250frames
Alternative Curve System: on,
low, 200,60, auto strenght 30%
Min I-frame Quantizer: 2, Max I-frame Quantizer: 4
Min P-frame Quantizer: 2, Max P-frame Quantizer: 6
Max Bitrate: 10000kbps, Max Overflow Improvement: 60%, Max Overflow Degradation: 60%
Start Credits: OFF, End Credits: off
Encode credits in greyscale: OFF


These may seem strange settings but i have used the very successfully for some time. Any help would be apprecialted

Thanks

[Koepi]

Originally posted by droolian01
Alternative Curve System: on,
low, 200,60, auto strenght 30%
Min I-frame Quantizer: 2, Max I-frame Quantizer: 4
Min P-frame Quantizer: 2, Max P-frame Quantizer: 6


Are you sure I have to comment on this?

[Kyo]

Well.... :rolleyes: Now I really really understand Koepi...

@droolian01

If you CAP the qantizers to a very low values what the hell can do the codec? ALL the documentation about ANY codec say that this could *broke* the final size-stimation! so please DON'T CAP the quantizers too low, if you search the forum you will find cute values like:

I-L=2
I-H=6
P-L=2
P-H=16 or even 12 BUT NOT 6 <-- this is overkill!!!

Of course the low quant values *WILL* work, but not *MUST* work :rolleyes:

Ja ne...

[Pasqui]

@ Koepi:
Thanks for the tip. Increasing the credit reduction factor was the trick. I should have been more carefull to the quants used for credits encoding. Sorry ! :o
BTW, do you intend to release a new build with pete's last commits ?
It could be rather nice to have preview in YV12

Best regards,

Pasqui.

[droolian01]

Hi guys,
thanks for the advice - i am actually aware of this issue - that trying to cap quants too tightly doesn't give the codec 'room' to appropriately scale. But saying that you never can do this is also wrong (although not very often i agree!). But i can't critise too much as i didn't give all the info (my fault).
I have never ripped a dvd (never got round to it) but do a lot of capturing, mostly 45 min episodes but also some 55-60 ones too. I find the settings i quoted work perfectly, as this will show (actully never used debug view before!!! - first time for everything!)

XviD Analyzer v0.16 by MoonWalker & MarcFD
e-mails : s_ilias@gmx.net & marc.fd@libertysurf.fr


Quantizers Analisis
---------------------

Quantizers Used For Movie :
------------------------------
Quant 2 Used : 24011 Times, Percentage Used : 41.34%
Quant 3 Used : 33926 Times, Percentage Used : 58.42%
Quant 4 Used : 138 Times, Percentage Used : 0.24%

Average Quantizer Used for Movie : 2.589

No credits encoding!!

MPEG Quantization Type Used 58075 timed, Percentage Used : 100.00%

No prevention happened


Intra-Frame (Key-Frame) Quantizers
------------------------------------

Movie
-------
Quant 2 Used : 654 Times, Percentage Used : 93.70%
Quant 3 Used : 6 Times, Percentage Used : 0.86%
Quant 4 Used : 38 Times, Percentage Used : 5.44%

No credits encoding!!

Inter-Frame (P-Frame) Quantizers
------------------------------------

Movie
-------
Quant 2 Used : 23357 Times, Percentage Used : 40.71%
Quant 3 Used : 33920 Times, Percentage Used : 59.12%
Quant 4 Used : 100 Times, Percentage Used : 0.17%

No credits encoding!!



Frame Analisis
----------------

Number Of Intra-Frames (Key-Frames) : 698
Number Of Inter-Frames (P-Frames) : 57377
Total Number Of Frames : 58075

1.20% of the Movie is Intra-Frames (Key-Frames)
98.80% of the Movie is Inter-Frames (P-Frames)



Size Analysis
----------------

1-Pass Size : 438403241 Bytes or 428128 KBytes or 418 MBytes
Scaled Size : 313991986 Bytes or 306632 KBytes or 299 MBytes
Actual Size : 313993260 Bytes or 306634 KBytes or 299 MBytes
Actual Size of Avi File without Sound : 315423744 Bytes or 308031 KBytes or 300 MBytes

Usefull Statistics
------------------
Compressibility : 71.62%
Relative Quality of XviD avi : 77.25%
Absolute Quality of XviD avi : 98.23%

Resolution 576x336 'widescreen' PAL

Its obviously not very dificult to encode this dvb-t capture- i want to put 2 45 minute episodes (buffy actually) on one cd. I feel using such tight limits with such easy material is justified - why should i chance an occasiional crapppy quant=10 frame when there is no need. Of course the real question is if i left I and P @ 2-31 would i get the same results - probably, but i have such a hege thoughput (still got overflowing hd!!!!) i prefer not to risk it. As you can see i could have capped P frames even tighter!!!

Now these settings also give fantasitc encodes of '6 feet under' which runs for about an hour (these are capped with a bt8xx cheapo tv card in huffuv (res 368x576 - sort of 1/2 full frame)). The episode that was causing trouble was 'band of brothers ep2' capped via dvb-t, this has a run time about the same as '6 feet under' and if i got slightly oversized files i would first of all susspect my tight quant limits, but the overshoot was HUGE. I have uninstalled everything deleted all registry keys (i think!) for xvid settings and reinstalled Koepi's 04102002 stable build, this is what produced these nice figures above. I will encode 'band of brothers' (problem ep) when i have finished posting my nice low quant buffy ep on abmbvs.

Sorry for rambling on, i would never think of encoding a whole movie at such tight quants, now THAT WOULD be silly:o

Thanks again:)

[Koepi]

At least use different alt-cc settings. those are prone to these errors, too.
Low agression, max framesize 2*average - that's too tight.

use the default alt.cc settings or better pure linear scaling and you'll get what you want.

Koepi

[droolian01]

Wow, quick reply!

Actually you make a really wise point. With my relatively large capturing schedule it is silly to be so restrictive - only needs slightly more difficult material to encode and i end up having to do it all again (like i have already, twice!!:eek: )

I'll definitely need to loosen up a bit (and my quant limits too!)

Thanks again