site_archiver@lists.apple.com Delivered-To: pro-apps-dev@lists.apple.com Hi everyone, I am working on a FxPlug Filter. I have created a simple filter that uses both r408 and r4fl. Currently, the filter takes incoming r408 (or r4fl) bytes, converts them to RGB, does some work, and then back to r408. I am having a really difficult time trying to get the r408 image to match the r4fl image. The r4fl is always darker than the r408. I am on Snow Leopard, testing with Final Cut Pro 7.0.1. I am using a scale value of 255/219 on the incoming Y channel, and a value of 219/255 to scale back out. The formula looks something li The odd part about this, is that the code that I normally use in my QuickTime component to convert from r408/r4fl to RGB (and back) doesn't work with this API. I get color shifting with r408 and luminance problems with r4fl. Can anyone suggest some ways of tweaking the YCbCr <-> RGB code to get a match? (Or better yet, post a recommended C code sample for both r408 and r4fl). Thanks, bob. _______________________________________________ Do not post admin requests to the list. They will be ignored. Pro-apps-dev mailing list (Pro-apps-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/pro-apps-dev/site_archiver%40lists.ap... This email sent to site_archiver@lists.apple.com