switching 8 movies over 8 displays
May 10, 2009 at 9:48pm
switching 8 movies over 8 displays
I’m working on an installation with 8 projections and 8 movies. the movies are switched around the screens. the movies should just keep playing only changing from output.
I’m fairly new with performance setup and open GL,
So i made a patch, and after collecting some computer screens from friends i did a test drive with all 8screens and first all looked good. ultra fast switching of movies and normal FPS.
Guess it has something to do with my video switching.
take A look, maybe you have some better ideas.
maybe use direct window instead?
ok. thanks for reading
Two 2.26GHz Quad-Core Intel Xeon
here a screen shot how it looks
May 11, 2009 at 5:19pm
see if this post helps your crashing problems:
May 11, 2009 at 7:55pm
The thread listed above, especially vade’s detailed post, is very very useful.
I had a similar situation, where I was driving three separate outputs. The patch would start with all windows on one monitor, then move all windows to their output monitor, go fullscreen, and start playing.
This sequence is absolutely key: if it started playing with all windows on one screen, then moved them, then fullscreen, CRASH.
If it moved the windows, then started playing, then fullscreen, CRASH!
Only reliable (and so far, totally reliable) sequence was to put the windows on their right output, fullscreen, and then start playing.
Also, while it might be tempting to move movies from output to output by changing the coordinates of the jit.window, it is best to leave the jit.windows on a specific output, and just change the movie that plays to each one.
The reasons for this are very clearly explained by vade’s post.
May 11, 2009 at 9:19pm
Thanks for the responses!
Yess moving the windows to the right screen/gpu before hitting qmetro is essential for using GL.
I have to switch 8 movies of 1 GB each,
I load 8 movies in 8 qt.movies.
I have no crashes anymore, i guess i touched one of the window settings accidentally, and kaboom.
I have 11 FPS and that’s too slow. fps goes down to 6…
When i use Poly i need to load 8 times 8 movies. then i would be able switch properly and use more gL power but i seems to be too much movies too load.
8 movies that need to play continuously and switch them over the 8 outputs… maybe jit.scissors and one big movie?
I tried to use a Ramdisk but that got me into trouble.
I’m learning a lot! any ideas to improve?
May 11, 2009 at 10:39pm
it’s easier to help if you post the max patch instead of the screenshot, as people will then be able to try out and modify your patch directly (although probably not everybody will have 8 friends with an extra monitor, or one friend with 8 extra monitors).
let me know where you’re checking the setup, and i’ll pass by…
May 11, 2009 at 11:36pm
Yo cool jan
Well testing along, i used the first patch again, the more simple one, with movies of 320-240. that worked nice 60fps. and switching on the frame. cool but a bit too blocky movies.
I would like to use 640 480. i tried and got around 10 fps
the more nifty Gpu part gets me into trouble and worse results.
When using bigger movies, the Cpu goes up to 102%
here’s the patch! (the simple one)
Jan, welcome! I’ll drop you a line tomorrow
May 11, 2009 at 11:56pm
If you are on Apple platform, try encoding using ProRes422. I had better results with that than with PhotoJPEG @ 75%.
Also, if you have multiple hard drives, try distributing the movies among different drives.
What kind of CPU are you using?
May 12, 2009 at 12:03am
I’m on a mac,
2 x 2.26 ghz Quad xeon
hmmm i have an extra firewire800 harddrive, might help…
May 12, 2009 at 11:29am
this patch down below
made after looking at Vades examples keeps crashing my GPU
After loading the movies, and putting windows at the right spot.
May 12, 2009 at 1:27pm
May be you should try
May 12, 2009 at 1:29pm
and it’s not adept but adapt1…
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