David Beaudry

For a project I'm currently working I have a background image of various celestial objects in space (yes, this is realted to a previous post I had here involving a spaceship ). Instead of rendering a movie (or rather due to failed attempts at rendering a movie) I'm merely scrolling thru a giant image. The file size is 1920 x 14000 pixels, with my changing "window" (via srcrect) at 1920 x 1200. Everything works and looks great, however I still get a bit of jerkiness on my quad-core mac pro with a 512 mb nvidia gforce 8800gt. Loading into RAM didn't improve things, either. The image is a jpeg. Certainly reducing the quality of the jpeg helps a bit, but was wondering if there might be a more suitable image format for this. Or perhaps that isn't even an issue once a single image is loaded?

P.S. In case it is helpful, my image path is:

jit.qt.movie 1920 1200 >> jit.gl.videoplane >> jit.gl.render >> jit.window

Hi all,
For a project I'm currently working I have a background image of various celestial objects in space (yes, this is realted to a previous post I had here involving a spaceship  ). Instead of rendering a movie (or rather due to failed attempts at rendering a movie) I'm merely scrolling thru a giant image. The file size is 1920 x 14000 pixels, with my changing "window" (via srcrect) at 1920 x 1200. Everything works and looks great, however I still get a bit of jerkiness on my quad-core mac pro with a 512 mb nvidia gforce 8800gt. Loading into RAM didn't improve things, either. The image is a jpeg. Certainly reducing the quality of the jpeg helps a bit, but was wondering if there might be a more suitable image format for this. Or perhaps that isn't even an issue once a single image is loaded?

P.S. In case it is helpful, my image path is:
jit.qt.movie 1920 1200 >> jit.gl.videoplane >> jit.gl.render >> jit.window


best-image-format-for-scrolling-effect

https://cycling74.com/forums/index.php?t=rview&th=18925&rid=1274

I don't think link still works to the file, I should check the server, but the patch is in there. It's not entirely elegant, but works very well on a slower machine than yours with hi-res images.

Have a look at this topic  https://cycling74.com/forums/index.php?t=rview&th=18925&rid=1274
I don't think link still works to the file, I should check the server, but the patch is in there. It's not entirely elegant, but works very well on a slower machine than yours with hi-res images. 

seems like several possibilities to go wrong here.

the biggest one i can think of is if you are banging your qt.movie every frame, instead of once at initialization.

also, you should probably be using jit.gl.texture

lastly, i'm inclined to think you would get better performance with some form of "paging" as opposed to one huge texture. so you have two textures that join seamlessly, and as you scroll across the scene, you can swap the needed textures in and out. you would split your textures ahead of time and load them in at initialization time.

here's a rough example which uses two textures with @apply decal, and scrolls using the td.rota shader.

seems like several possibilities to go wrong here.
the biggest one i can think of is if you are banging your qt.movie every frame, instead of once at initialization.

You can also send an image direct to matrix with importmovie asds.jpeg I'm not sure what is more good quicktime versus jit matrix but i used in many patches with good results.

best image format for "scrolling" effect