Comments on: Core Animation Tutorial: Rendering QuickTime Movies In A CAOpenGLLayer http://www.cimgf.com/2008/09/10/core-animation-tutorial-rendering-quicktime-movies-in-a-caopengllayer/ Taglines are for Windows programmers Mon, 26 Jul 2010 16:50:30 +0000 hourly 1 http://wordpress.org/?v=3.0 By: JetForMe http://www.cimgf.com/2008/09/10/core-animation-tutorial-rendering-quicktime-movies-in-a-caopengllayer/comment-page-1/#comment-1403 JetForMe Mon, 19 Jul 2010 08:02:51 +0000 http://www.cimgf.com/?p=219#comment-1403 <p>I have the same problem as jwwalker, 10.6.4.</p> I have the same problem as jwwalker, 10.6.4.

]]> By: jwwalker http://www.cimgf.com/2008/09/10/core-animation-tutorial-rendering-quicktime-movies-in-a-caopengllayer/comment-page-1/#comment-1331 jwwalker Sat, 03 Apr 2010 01:57:47 +0000 http://www.cimgf.com/?p=219#comment-1331 <p>The demo isn't working for me... it displays the initial image of the movie, but doesn't play. It looks like QTVisualContextIsNewImageAvailable is never returning true. This is on a Mac Pro running 10.6.3.</p> The demo isn’t working for me… it displays the initial image of the movie, but doesn’t play. It looks like QTVisualContextIsNewImageAvailable is never returning true. This is on a Mac Pro running 10.6.3.

]]> By: Matt Long http://www.cimgf.com/2008/09/10/core-animation-tutorial-rendering-quicktime-movies-in-a-caopengllayer/comment-page-1/#comment-1296 Matt Long Tue, 09 Mar 2010 15:03:03 +0000 http://www.cimgf.com/?p=219#comment-1296 <p>@maru</p> <p>I'm not sure exactly what you are trying to do. If video has already been captured, you can just load it into a QTMovie and use the tutorial on this page to render into a CAOpenGLLayer. If you are talking about displaying the video in real time, then you should look into using QTCaptureLayer.</p> <p>Best Regards,</p> <p>-Matt</p> @maru

I’m not sure exactly what you are trying to do. If video has already been captured, you can just load it into a QTMovie and use the tutorial on this page to render into a CAOpenGLLayer. If you are talking about displaying the video in real time, then you should look into using QTCaptureLayer.

Best Regards,

-Matt

]]> By: maru http://www.cimgf.com/2008/09/10/core-animation-tutorial-rendering-quicktime-movies-in-a-caopengllayer/comment-page-1/#comment-1295 maru Tue, 09 Mar 2010 13:11:38 +0000 http://www.cimgf.com/?p=219#comment-1295 <p>Hi,</p> <p>I'm wondering how can I render captured video via QTCapture in a CAOpenGLLayer. I guess I need Core Video feature to compose some captured video into single stream, but I cannot find any clue... Any idea?</p> Hi,

I’m wondering how can I render captured video via QTCapture in a CAOpenGLLayer. I guess I need Core Video feature to compose some captured video into single stream, but I cannot find any clue… Any idea?

]]> By: Matt Long http://www.cimgf.com/2008/09/10/core-animation-tutorial-rendering-quicktime-movies-in-a-caopengllayer/comment-page-1/#comment-806 Matt Long Thu, 18 Sep 2008 05:07:51 +0000 http://www.cimgf.com/?p=219#comment-806 <p>@vade</p> <p>Just a quick not on your comment, the call to super drawInCGLContext does do the flush for you. I didn't know that before either, but someone pointed it out on the Cocoa-dev list.</p> <p>Thanks and I'm glad the site is helpful to you.</p> <p>-Matt</p> @vade

Just a quick not on your comment, the call to super drawInCGLContext does do the flush for you. I didn’t know that before either, but someone pointed it out on the Cocoa-dev list.

Thanks and I’m glad the site is helpful to you.

-Matt

]]> By: vade http://www.cimgf.com/2008/09/10/core-animation-tutorial-rendering-quicktime-movies-in-a-caopengllayer/comment-page-1/#comment-805 vade Thu, 18 Sep 2008 02:09:53 +0000 http://www.cimgf.com/?p=219#comment-805 <p>Oh. I forgot to thank you for all your posts, they've been helpful to a sprouting cocoa developer. Thank you!</p> Oh. I forgot to thank you for all your posts, they’ve been helpful to a sprouting cocoa developer. Thank you!

]]> By: vade http://www.cimgf.com/2008/09/10/core-animation-tutorial-rendering-quicktime-movies-in-a-caopengllayer/comment-page-1/#comment-804 vade Thu, 18 Sep 2008 02:09:23 +0000 http://www.cimgf.com/?p=219#comment-804 <p>Hi.</p> <p>I use a similar path for my Quartz Composer power realtime video mixer app in development. However I dont use Core Animation and am not very familiar with it, but, I'd imagein you need to flush after you push the frame to the CAOpenGLLayer, unless the super implementation flushes for you? I know I have to flush with my code..</p> <p>As far as display link is concerned, its surprisingly easy to set up, and for those looking to power some effects easily, I highly suggest using Quartz Composer and QCrenderers. You can simply pass your currentFrame variable into a QCRenderers published image input port. Thats it! So awesome.</p> Hi.

I use a similar path for my Quartz Composer power realtime video mixer app in development. However I dont use Core Animation and am not very familiar with it, but, I’d imagein you need to flush after you push the frame to the CAOpenGLLayer, unless the super implementation flushes for you? I know I have to flush with my code..

As far as display link is concerned, its surprisingly easy to set up, and for those looking to power some effects easily, I highly suggest using Quartz Composer and QCrenderers. You can simply pass your currentFrame variable into a QCRenderers published image input port. Thats it! So awesome.

]]> By: Matt Long http://www.cimgf.com/2008/09/10/core-animation-tutorial-rendering-quicktime-movies-in-a-caopengllayer/comment-page-1/#comment-802 Matt Long Wed, 10 Sep 2008 18:49:25 +0000 http://www.cimgf.com/?p=219#comment-802 <p>@nickludlam</p> <p>Lovely! The CPU part doesn't surprise me so much, but I'm not sure why you are not getting the video to display. Will see what I can find out.</p> <p>-Matt</p> @nickludlam

Lovely! The CPU part doesn’t surprise me so much, but I’m not sure why you are not getting the video to display. Will see what I can find out.

-Matt

]]> By: nickludlam http://www.cimgf.com/2008/09/10/core-animation-tutorial-rendering-quicktime-movies-in-a-caopengllayer/comment-page-1/#comment-801 nickludlam Wed, 10 Sep 2008 16:32:12 +0000 http://www.cimgf.com/?p=219#comment-801 <p>Trying this on a C2D Macbook Pro, I'm getting a window which flicks briefly from black to white and stops. It appears to do nothing, and takes up about 50% of my CPU time. There's nothing revealing in the log output either.</p> Trying this on a C2D Macbook Pro, I’m getting a window which flicks briefly from black to white and stops. It appears to do nothing, and takes up about 50% of my CPU time. There’s nothing revealing in the log output either.

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