Contrast - video texture2

vvvv beta general
1

Hi VVVVictors,
I desperately need to change the brightness/contrast of the Video Texture node.
I just realised that the problem is known alreay but unfortunately I have no
clue how to program a freeframe.dll.

Has anyone a .dll that could to the job?
Thanks Thomas

2

have you looked through all of those available:
http://freeframe.sourceforge.net/downloads.html

depending on the type of your graphicscard it would be even easier to change the contrast of a texture via a pixelshader. if your graphicscard supports shaders it would be just a 2liner. which card do you have?

3

Hi Joreg,
I have a ATI Radeon 9600.
Where would I find that two liner?

4

seems you are lucky. your card should understand pixelshaders.

attached you find an effect that should allow you to change contrast on a texture. (cannot test it right now on my laptop!)

if you’ve never worked with effects;

  • put Contrast.fx in your /effects directory
  • press Alt+E (or start vvvv)
  • create the node: Contrast (EX9.Effect)
  • create the node: XFile (EX9 Load)
  • load the quad.x (from girlpower/xfiles)
  • connect xfile to Contrast
  • connect your videotexture to Contrast
  • use the ContrastPin to change contrast

hope it works.

5

should be time for a color transform tutorial…

6

Hi Joreg,
It doesn’t seem to work. If I do it like you described, nothing shows up on my machine…
If you get a chance can you test it?
Thanks T.

7

aokay.

that could not work. try attached. put both .v4p and …fx in the same directory!

colortransform.rar (2.2 kB)

8

If you are trying to control the brightness/contrast of a video capture card, another solution would be to adjust the brightness/contrast in the driver properies.

9

THANK YOU !
T.