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Old 20th April 2004, 07:07   #8  |  Link
Jawor
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Join Date: Jan 2004
Location: www.videoaudio.pl
Posts: 218
As I promised, here are the results of tests performed on The X-Files #8ABX03: "Redrum" (25fps, progressive, 4:3)

XviD settings:
Profile: AS@L5
MSP=6, ChromaME, VHQ=1
Trellis, GMC, Qpel, AQ ON
Packed Bitstream OFF
B-frames 3/1.50/1.00
B-VOP Sensitivity 3 (movie), 10 (credits)
weight=0.4 for the end credits
Quantizers 2-31
maximum I-frame interval 250
"Fast" first pass
desired size 180 MB
I left the rest at their defaults

AviSynth script
Code:
AVISource(...)
ConvertToYV12()
Crop(4,4,-4,-2)
Deen("c3d",1,16,20)
UnDot()
LanczosResize(512,384)
UnDot()
I captured this episode using a Bt878A-based card at 768x576. The source was quite noisy, hence the usage of Deen() and 2*UnDot(). The clip was more compressible, than I thought, so artifacts were not so obvious. Jawor's 1CD Matrix achieved an average quantizer of 4.197, HVS - Good Picture gave avg. quant = 4.335.

Quantizers and frame types for Jawor's 1CD Matrix:
I-frames - 1.27 %
P-frames - 22.29 %
B-frames - 61.93 %
S-frames - 14.51 %
2 - 4.9 %
3 - 24.6 %
4 - 22.6 %
5 - 42.0 %
6 - 4.6 %
7 - 0.6 %
8 - 0.4 %
9 - 0.3 %
>9 - 0.1 %

Quantizers and frame types for HVS - Good Picture:
I-frames - 1.28 %
P-frames - 22.58 %
B-frames - 61.88 %
S-frames - 14.27 %
2 - 3.3 %
3 - 24.8 %
4 - 20.1 %
5 - 41.6 %
6 - 7.9 %
7 - 1.3 %
8 - 0.2 %
9 - 0.4 %
>9 - 0.3 %

Take a look at these two screenshots - the first one is Jawor's 1CD Matrix, the second one is from HVS - Good Picture encode:


Compare the mosquito noise on the edges - it's slightly more visible with HVS - Good Picture. Besides the mosquito noise, I haven't notice any diffrences between the two clips.

Currently I'm testing the same clip with the HVS - Best Picture matrix.
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Last edited by Jawor; 26th April 2004 at 10:31.
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