Avisynth: Possibly Reduce Background Flickering?

ARnet_tenRA · #1 03-13-2003, 08:33 AM

I ran some recent tests and I found that using BicubicResize instead of LanczosResize+MergeLuma(Blur(.2)) actually gives me a higher quality image and reduces the slight background flickering I was getting before.

Here is my old script:

Code:

Import ("C:\filters\functions.h")

AviSource("E:\Shrek.avi")
LegalClip()

GripCrop( width=528, height=480, overscan=2 )
GripSize(resizer="lanczosresize")

mergechroma(blur(1).blur(1))
mergeluma(blur(0.2))
SpaceDust()
FluxSmooth()
DctFilter(1,1,1,1,1,.5,.5,0)

GripBorders()
LegalClip()
SampleClip()

And here is my new script:

Code:

Import ("C:\filters\functions.h")

AviSource("E:\Shrek.avi")
LegalClip()

GripCrop( width=528, height=480, overscan=2 )
GripSize(resizer="bicubicresize")

mergechroma(blur(1).blur(1))
SpaceDust()
FluxSmooth()
DctFilter(1,1,1,1,1,.5,.5,0)

GripBorders()
LegalClip()
SampleClip()

Let me know your thought/results using this.

-Tenra

Holomatrix · #2 03-13-2003, 11:33 AM

If your talking about when all of a sudden the video will go brighter then darker in certain areas then I would be interested in testing this to. I thought it was just my JVC DVD player trying to compensate when the movie got a little darker. I don't remember this happening with my APEX, but I also just started using LanczosResize too. Wierd. I switched to Lanczos because it gives a little sharper picture than BiCubic (.75) but if this new resizer is the cause of the flickering then I should go back to Bicubic.

ARnet_tenRA · #3 03-13-2003, 11:45 AM

Quote:

Originally Posted by Holomatrix

I switched to Lanczos because it gives a little sharper picture than BiCubic (.75) but if this new resizer is the cause of the flickering then I should go back to Bicubic.

Just so you know, when I switched to BiCubic I removed the MergeLuma(Blur.2)) line from my script. I figure that the loss of sharpness by not using Lanczos could be counteracted by not using Blur.

Regards,
Tenra

Holomatrix · #4 03-13-2003, 12:27 PM

I was just compairing Bicibic to Lanczos because I don't use MergeLuma or MergeCroma.