Forums > Jitter

vram overload – possible?


wk
June 15, 2006 | 11:24 pm

hello,

when i try to read still image and display it on gl.videoplane,
i get white screen or sometimes image gets gradually distorted (like
with some old school vj fx – its sort of moving despite the fact its
just a jpeg)

i`ve tried to do an example patch but everything works fine in small

scale,

because my patch is quite big using maybe 50 different textures,

shaders,

and all gl stuff makes me think maybe there is something wrong with

the hardware (ram?)

is it possible?

or system?

i`m on powerbook 12 1.33 768ram (GeForce FX Go5200 64vram) os x.3.9
latest max/jitter

thanks for any help,

wojciech


June 15, 2006 | 11:35 pm

While it’s possible that VRAM is the culprit (if you have a lot of
textures), you might be hitting the instruction limit for the card’s
programmable pipeline. If you are using a bunch of jit.gl.slab objects,
you might try consolidating your shader programs.

Cheers,
Andrew B.


June 15, 2006 | 11:37 pm

Also, try using @mode static for still images. Does that change anything?

Dynamic mode works best for constantly updating video.

Cheers,
Andrew B.


June 16, 2006 | 8:37 am

I’ve used about 100 512×512 textures with no problems (static images).

Check that your textures are above the minimum size for your graphics
card – I think that 16×16 or 32×32 (there’s a post on it somewhere in
the list archives). I just ran into this problem where my textures
were too small and showed up as either white or random noise.
Resizing them fixes it.


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