> > On Nov 2, 2010, at 8:13 PM, Leon Qiao wrote:
> > I got some problems on showing a frame-by-frame animations. I use some > png > files in quite a big size(1024* 768). The frame rate I required is near > 1/24. > Consider that at the framerate you desire, this will require > 1024*768*4*24=72MB of memory per second. You will almost certainly need to > rethink your strategy. > > Is there any way to solve this problem? > > There are many, which one is appropriate will require a lot more > information about what your animation is. Generally: 1) Make it a movie instead 2) Break the animation into static and animated bits, stuff them into views, > move the views. 3) Shrink your image sizes, scale them up for animation. 512x384 for example > cuts the memory usage by 75%. -- David Duncan This suggestion/line of thought is extremely non-standard, but can perform within the specified framerate. Quartz Composer provides an image importer that *can* outputs a structure of single frame images if one chooses to the option to extract all images. Then, one can play through that sequence and create what amounts to a movie, without being hobbled by Quicktime's lack of performance. One can do this in HD quality, and still get a high fps, it's just that load time is "eh", and you can't load new sequences programatically. I'm sure David's suggestion is way more on point, and better working method. Edit: Oh, iPad. Hmm, nevermind. Another reason why QC should work in iOS. Still sending this email, as a note on the availability of this functionality on the desktop. -- George Toledo gtole...@gmail.com www.georgetoledo.com The information contained in this E-mail and any attachments may be confidential. If you have received this E-mail in error, please notify us immediately by telephone or return E-mail. You should not use or disclose the contents of this E-mail or any of the attachments for any purpose or to any persons. _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
