tiya3dd

[WarpEnterprises]

No. From VD help:
2. Fast repack

Fast repack mode allows a video stream to be recompressed. In this mode, VirtualDub hooks decompressor directly to compressor and tries to find the fastest way from one video format to another.

Advantages:

· Depending on the video codecs involved, recompression might take place in a faster format, such as YUV. This can significantly speed recompression.

Disadvantages:

· May not work if the codecs cannot agree on a common image format.

· Video cannot be viewed during process.

· No image processing possible.

· Some video codecs handle YUV data incorrectly, which can result in upside-down video in this mode.

[jang0]

ErMaC-

I noticed this also when encoding stuff in vdub with no preview window output. I think decompression is still needed with avisynth 2.5, but the colorspace conversion at the beginning of processing (of the mpeg2 decoder) is not needed anymore.

[frank]

First I must correct my posting: tiya3dd(0,10,10,28) has nearly the same compression as Convolution3D(preset="movieHQ")

Here my test results.

Conditions:
Clip Jurassic Park, first 4800 frames.
Encoded stream: SVCD 480x576 MPEG-2 with CCE, VBR Q40.
Avisynth 2.5
P4 2 GHz

Script:
...
mpeg2source("jurass1.d2v",idct=5)
Crop(20,12,682,552)
BicubicResize(448,408,0,0.5)
FILTER()
AddBorders(16,84,16,84)
ConvertToYUY2
...

In the order of compression:
100.0% NO FILTER
98.4% TemporalSoften(1,10,10)
95.8% Convolution3D(preset="movieHQ")
95.5% Tiya3dd(0,10,10,28) beta1
95.2% TemporalSmoother(2,1) --Avisynth 2.07
94.8% TemporalSoften(2,8,8)
94.8% TemporalSoften(2,4,4)
94.6% TemporalSoften(2,10,10)
94.1% TemporalSmoother(2,2) --Avisynth 2.07
93.8% TemporalSoften(3,10,10)
93.8% Convolution3D(preset="movieLQ")

92.0 % Tiya3dd(0,10,10,30) beta2

Quality:
The best visual quality has C3D! No blocking in smooth nebulous areas.
tiay3dd() beta1 produces some area flickering. You can watch it on the Universal Studios Globe logo.

EDIT:
Latest tests show that temporal influence param in tiya3dd has great effect and should be greater than 28 to work. (standard = 30)
Speed and quality now nearby C3D.

[Marc FD]

>I noticed this also when encoding stuff in vdub with no preview window
>output. I think decompression is still needed with avisynth 2.5, but the
> colorspace conversion at the beginning of processing (of the mpeg2
>decoder) is not needed anymore.

only in preview mode. if you use fast-repack and VDubMod and you feed him with YV12, it would never convert to YUY2 (if encoder accepts YV12). try transcoding XvID/DivX->XviD/DivX with VDub vs VDubMod, you'll see there is a speed difference.

>Quality:
>Latest tests show that temporal influence param in tiya3dd has main
>effect and should be greater than 28!
>Speed and quality now nearby C3D.

as you can see, there is no temporal thresholds in tiya3dd.
everything is left to temporal influence. if you use huge thresholds, using low values about 20-25 is better to avoid any ghosting. for soft thresholds, you may go to 30 or even more.

in fact, the best is to tweak to use the biggest temporal influence without any ghosting.

[Marc FD]

hi ^^

this filter is very very buggy.
the way it works is very hazardous.
i'm sorry, it's dumb typos in my assembly code.

i've fixed everything in deen/"c3d" mode, it's even able to output bitwise equal results (than vlad's filter) ^_^ (and speed is more "natural" now == much slower)

i'll release this in coming days...