My video is encoded with apple intermediate codec, 1920x1080. If you do have the freedom to make one video (some do not) you should have > better luck with the Image Texturing Properties patch than Cropping. > Cropping requires us to create a copy of the sub-region internally, whereas > texturing properties should just play with the GL commands to slide the > image around.
Hi Troy, thank you for your example. Unfortunely, if I try your composition with my source video FPS drops to 15-30. Have you done 'sanity tests' and made sure that these 20 movies play alright > in quicktime (all playing simultaneously?) and dont drop frames. One thing > to note is that the QC movie player ought to be set to asynchronous for > maximum performance (it can read ahead a few frames and buffer rather than > decode always just in time). Also check GL profiler and look at your video > memory usage while in QC, as QC will be 'heavier' texture usage wise, and if > you get into territory where you are just near, or over your physical VRam, > OS X will begin to swap it out, making anything on the GPU terribly slow. > You could also possibly try the beta of Tom Butterworth's and my alternative > quicktime player for QC 4.0, 10.6 only > http://v002.info/downloads/beta/v002%20MoviePlayer2.0%20Beta%203.zip > No idea if that will make a difference. > Wow, v002 player works great! :) I think I have found the solution: glTextCoord() works great, I used it not in the right way. I used a custom openGL patch that render only a quad and use glTextCoord() o crop the video, and it seems to work. Disabling color correction and enabling asynchronous mode in QC movie player rise FPS to >60. even with a 1920x1080 video input. Thank you to everybody for the hints! :) Luke
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