Video texture

Troubleshooting graphics
1

Hi,

I already searched a bit this forum about video textures but found nothing answering my question.

The problem is, that I am trying to have a video texture. The video is captured using the java media framework and now I want to set this video as a texture of my geo. But I dont know how to get started with this and jME. :?

Does anybody know how to solve my problem?



Thanks in advance.

deviation

2

hmm, I think that you’d have to do something custom in lwjgl for this. I’d be happy to look into it after GDC sometime.

3

You can try and copy the data into the texture each frame but it may be slow.

4

Right, which would be the custom lwjgl code I mentioned… We’ve all seen this done though in the past for in-game video screens and of course the source engine demos for HL2. So there must be quicker way than grabbing image data and setting it into a texture.

5

hmm,

I am thinking about this since a few days and until now I havent got deep enough into lwjgl to understand how to go on.

But if I understand you in the right way the "copy data to texture" thing will be to create a pbuffer out of the image/frame of the video input and right after that do something like

pbuffer.bindTexImage(Pbuffer.FRONT_LEFT_BUFFER);





:?

6

btw, does anybody how to convert the frame I get by the Java media framework into a Pbuffer?

7

You can do it by giving a image to TextureMangier each frame and creating a new texture but as I said it will be slow.

8

yes I tried it, it was damn slow. Because of many other things effects etc. the texture was updated with 1fps (!). But I am working on a solution that really updates the texture instead of destroying and creating again.

9

The solution that worked for the moment was to create each frame a new texture and run jme in one thread and the video grabber in another. So I got finally 60fps on an Athlon XP 2400 and a ATI Radeon 9800 Pro.



I tried to get a GL version of video texturing working but my GL skills are not that good - so I am really looking forward to a built in function in the future.