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Old 16th September 2002, 20:08   #1  |  Link
trbarry
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New SimpleResize v 0.3.2 - chroma delay bug fix

Hi -

Version 0.3.2.0 of my SimpleResize Avisynth filter fixes a horizontal chroma delay bug. No other changes.

See:

www.trbarry.com/Readme_SimpleResize.txt or
www.trbarry.com/SimpleResize.zip

- Tom
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Old 17th September 2002, 14:11   #2  |  Link
jarthel
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thanks Tom.

Jayel
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Old 17th September 2002, 15:16   #3  |  Link
vidiot
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Havenīt noticed this bug so far...
Hope it is still as fast as before...

Thx

Harald
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Old 17th September 2002, 17:56   #4  |  Link
trbarry
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The bug was posted in another thread around here somewhere. What it amounted to was a fractional pixel chroma delay in the V component of YUV color that could occur on odd pixels. It didn't show up much but in some extreme cases could make it look like your display was very slightly out of convergence. Someone with a great eye spotted it.

The speed should be identical.

- Tom
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Old 17th September 2002, 19:26   #5  |  Link
iago
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I can confirm that it is still lightning fast as before .
Thanks for this new fixed version trbarry.

regards,
iago
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Old 18th September 2002, 02:31   #6  |  Link
MaTTeR
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Thanks for the fix Tom, though it was hardly noticeable if at all in about 60 movies I've ripped.
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Old 18th September 2002, 08:39   #7  |  Link
ookzDVD
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@trbarry,

How about the width and height restriction which should be even,
is it removed ? or still applied ?
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Old 18th September 2002, 17:44   #8  |  Link
trbarry
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The width must still be a multiple of 2. This is not going to change because that is a requirement of the YUY2 data format.

I don't even remember about the height. I don't think so.

But be aware that many codecs or even video card like a multiple of 16 best, I think Xvid among them.

- Tom
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Old 19th September 2002, 13:15   #9  |  Link
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is simpleresize faster than other resize filter like lanczosresize?

Thanks

jayel
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Old 19th September 2002, 13:24   #10  |  Link
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@jarthel

Yes, absolutely (faster than LanczosResize)! You can try both to see the difference .

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Old 17th August 2016, 21:58   #11  |  Link
SuperLumberjack
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Hello

I tried this resize filter to change the aspect ratio of a video (I converted 8/7 aspect ratio to 4/3) and it's the best thing I found to do this

The only problem is that the YV24 and RGB24 color formats aren't supported. So the chroma resolution is divided by 2 with the YUY2.

It's why, I wanted to know if we could hope the support of one of these two formats or both ?

Thanks for the answer

(sorry for my bad English, I'm French)
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Old 17th August 2016, 22:38   #12  |  Link
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This has to be the worst case of necrophilia ever here, 14 years!
Quote:
Originally Posted by SuperLumberjack View Post
I tried this resize filter to change the aspect ratio of a video (I converted 8/7 aspect ratio to 4/3) and it's the best thing I found to do this
Install the recent version of Avisynth (2.6) and use internal filters. This will also solve your colour space issues. A good place to start is here.
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Old 18th August 2016, 08:56   #13  |  Link
SuperLumberjack
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Hello. Yeah, it's old !

But if I want to use the SimpleResize filter, it's because I have better results than with the others filters.

With the others filters it becomes blurry horizontaly. But with the SimpleResize filter, it's like an analogic enlargement I find

The only problem is the chroma downscaling when I convert RGB24 in YV12 or YUY2.
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Old 18th August 2016, 09:31   #14  |  Link
feisty2
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Quote:
it becomes blurry horizontaly.
Bicubicresize(b=-1,c=0)
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Old 18th August 2016, 12:52   #15  |  Link
SuperLumberjack
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Thanks !

It's a good idea, but it's a bit unnatural

The ideal it's a horizontal enlargement type "CRT screen-like" if you see what I mean

But I know it's hard to find.

The SimpleResize would be perfect if there isn't a lost of accuracy due to the conversion to YUY2 color format.
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Old 18th August 2016, 13:05   #16  |  Link
feisty2
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http://forum.doom9.org/showthread.php?t=170732
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Old 18th August 2016, 14:06   #17  |  Link
SuperLumberjack
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Thanks !

But I don't like scanlines I wanted to say a horizontal enlargement which looks natural, not blurry, which looks pixel perfect like a CRT did.

But I want to enhance my image too

I think the SimpleResize is the best for that. But it becomes blurry because of the convertion of RGB24 to YUV2. It's just the chroma. If it was in YUV24 or RGB24, there shouldn't be any problem I think.

I should create a new topic. I don't want to pollute this one.
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Old 18th August 2016, 14:33   #18  |  Link
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I like feisty2's Bicubicresize(b=-1,c=0) suggestion, but if you must use SimpleResize:
Code:
w=<new width, integer>
h=<new height, integer>

## Last=RGB24
MergeRGB(
\   ShowRed  ("YV12").SimpleResize(w, h)
\ , ShowGreen("YV12").SimpleResize(w, h)
\ , ShowBlue ("YV12").SimpleResize(w, h)
\ )

## Last=YV24
YToUV(
\   UToY.SimpleResize(w, h)
\ , VToY.SimpleResize(w, h)
\ , Last.SimpleResize(w, h)
\ )

Last edited by raffriff42; 18th August 2016 at 14:36.
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Old 18th August 2016, 14:38   #19  |  Link
SuperLumberjack
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Thanks !

But can you explain please ? I don't understand everything. My scripts are generally very basic

Per example, my video has a native resolution of 256x224. I want 1408x1080.

Last edited by SuperLumberjack; 18th August 2016 at 14:43.
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Old 18th August 2016, 16:17   #20  |  Link
SuperLumberjack
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I understood. I try
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