Hi,
sorry but since you told me that I can improve the speed up to 400% I
am
getting crazy to get that. "QT Player" can quite play 2 movies 752 x
400 at
the same time without any problem. Within my OpenGL animation the 2
movies
play well too but all the moving objects go at half a speed on
my G5 + ATI9800.
And I have been trying any way to use GL_YCBCR_422_APPLE
unsuccessfully.
I would need some more specific information about the movies, like the
codec used and data rate, and also what the rest of your GL app does.
I can get two (three sometimes) 720x480 NTSC DV clips playing at 30fps
with the GL scene being drawn at 60fps on my 1Ghz Powerbook. The way
you task QT and draw the scene is pretty critical so here's a few
hints:
- use a production/acquisition format like DV, Photo-Jpeg or even
uncompressed YUV
- remove any audio
- try StartMovie() for playing the video
- SetMovieRate() will set the speed but it takes a fixed point value
- call MoviesTask() often. I do this once per GL render pass.
- throttle the GL rendering. I target 60fps and locked to the VBL of a
laptop or projector
- I rolled my own testing code for frame edges, which is ugly, ugly
code, but works well
Have you a small piece of code to show me
The code you sent to me a few weeks ago looked fine for the texturing,
and it should work with that QT call I gave you. The application I
work on is large with the code spread over several classes, so the best
I can do at the moment is extract little fragments. Maybe someone else
has a more succinct example, like GLCompositor without the composting
code?
cgc
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