Sorry about the typos laden questions. I was confusing the image dimensions patch for the rendering destination dimensions patch and that was the source of my dumb questions! I just read the patch description now and realised — something I haven't done in a while :?
On 4 June 2010 10:04, Alastair Leith <qc.student...@gmail.com> wrote: > Hi Troy > > Looking at your comp I noticed that as the Player window gets bigger the > Width and Height outputs from the Image Dimensions patch get bigger and > therefore small as the window is made bigger. > > But the numbers don't seem to relate to any particular reference like total > screen width and height being equivalent to 1.000 or anything like that. > > What is rational of this dimensioning output? Does it bear any relationship > to normalised co-ordinates (where I though Width is always 2 (and > co-ordinates in the range [-1,1])? > > > On 04/06/2010, at 1:50 AM, Troy Koelling wrote: > > 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. > > <Image Texturing Properties - Split.qtz> > > > > On Jun 3, 2010, at 8:29 AM, vade wrote: > > Have you deduced what the actual performance bottleneck is? Playing 20 > videos, or even one very high resolution, 60FPS movie can, depending on your > hardware, disk subsystem, and chosen codec, bring a computer to its knees > rather quickly > > 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. > > > > On Jun 3, 2010, at 10:39 AM, luca palmili wrote: > > Hi, > I need to play 20 videos in my composition, each one in a separate quad. If > I use 20 sprites linked with 20 players, performance drop down. > I tried to pre-render videos in one single video in high resolution, use > 'image crop' to crop multiple parts from it, and then send the cropped > images to 20 sprites, but I still got low FPS. > I tried also to write a custom plugin that render a simple quad (following > this<http://developer.apple.com/Mac/library/documentation/GraphicsImaging/Conceptual/QuartzComposer_Patch_PlugIn_ProgGuide/WritingConsumerPatches/WritingConsumerPatches.html#//apple_ref/doc/uid/TP40004787-CH5-SW1>example) > and use UV coords to crop the high-res video using glTexCoord() for > each vertex: performance growed up a bit, but I'm still under 60 FPS. > Is there another way to solve this kind of problem? > > Thank you, > Luke > _______________________________________________ > Do not post admin requests to the list. They will be ignored. > Quartzcomposer-dev mailing list (Quartzcomposer-dev@lists.apple.com) > Help/Unsubscribe/Update your Subscription: > http://lists.apple.com/mailman/options/quartzcomposer-dev/doktorp%40mac.com > > This email sent to dokt...@mac.com > > > _______________________________________________ > Do not post admin requests to the list. They will be ignored. > Quartzcomposer-dev mailing list (Quartzcomposer-dev@lists.apple.com) > Help/Unsubscribe/Update your Subscription: > > http://lists.apple.com/mailman/options/quartzcomposer-dev/tkoelling%40apple.com > > This email sent to tkoell...@apple.com > > > _______________________________________________ > Do not post admin requests to the list. They will be ignored. > Quartzcomposer-dev mailing list (Quartzcomposer-dev@lists.apple.com) > Help/Unsubscribe/Update your Subscription: > > http://lists.apple.com/mailman/options/quartzcomposer-dev/qc.student.au%40gmail.com > > This email sent to qc.student...@gmail.com > > >
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