December 2009 - Pro-apps-dev

[Q] timecode for dropping frame?
by JongAm Park 27 Dec '09

27 Dec '09

site_archiver(a)lists.apple.com Delivered-To: pro-apps-dev(a)lists.apple.com Domainkey-signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=Received:X-Yahoo-SMTP:X-YMail-OSG:X-Yahoo-Newman-Property:Content-Type:Mime-Version:Subject:From:In-Reply-To:Date:Content-Transfer-Encoding:Message-Id:References:To:X-Mailer; b=j3XrUsOCzz6Q/BcNdqAWHMjJxxLcCRKhvLkBcMIvVb9QADnjWBgAJmIPoNokJ1c7pKXhQlosiYaWkSE9qvqh1qg9p/HNGVhTgyAgcezis9WVRfsFlL1Wweo4H3TJ6ZTJ01+xUaogaH7cAT/FbzRJ/e+l5t7vurbtSjuKGpIzGX4= ; I would like to add some more information I asked in quicktime-apl mailing list. The issue was the the timecode returned by [[qtMovie attributeForKey:QTMovieCurrentTimeAttribute] QTTimeValue]; or currentTime returns somewhat weird timecode for dropping frame video files. However, the FCP and the QuickTime player ( not X ) displays the timecode correctly for dropping frame video clips. This is the pattern I found : Left : timecode from QuickTime API, which is not right. Right : timecode overlay imposed by FCP, which is correct (QuickTime Player also shows this timecode. ) Time from QT : 33 sec 28 Overlay : 33 sec 28 34 sec 00 ( jump 1 frame) 33 sec 29 (continue) 34 sec 01 34 sec 00 34 sec 02 34 sec 01 Time from QT : 59sec 29 Overlay : 59;28 1 min 00 sec 00 59;29 1 min 00 sec 01 1:00;02 ( jumping 2 frames) ( This is correct. At every 1 min, timecodes for 2 frames are dropped. ) 1 min 06 sec 28 1:06;29 1 min 07 sec 00 (jump 1 frame ) 1:07;00 1 min 39 sec 28 1:39;28 1 min 40 sec 00 (jump 1 frame ) 1:39;29 1 min 40 sec 01 1:40;00 1 min 59sec 29 1:59;28 2 min 00 sec 00 1:59;29 2 min 00 sec 01 2:00;02 ( jumping 2 frames) 2 min 00 sec 02 2:00;03 2 min 13 sec 28 2:13;29 2 min 14 sec 00 (jump 1 frame) 2:14;00 For me to let my program display the correct timecode, I should either have unmodified timecode to have it increased by 2 frame at every 1 min, or QuickTime API should detect that the clip is DF one and return correct time code. However, it drops 1 frame at every 33rd or 34th frame ( I'm not sure it is always so. ) So, is there any way to retrieve correct timecode? Thank you. JongAm Park _______________________________________________ Do not post admin requests to the list. They will be ignored. Pro-apps-dev mailing list (Pro-apps-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/pro-apps-dev/site_archiver%40lists.a… This email sent to site_archiver(a)lists.apple.com

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Re: Color shifting with r408
by Robert Monaghan 24 Dec '09

24 Dec '09

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Re: Color shifting with r408
by Darrin Cardani 24 Dec '09

24 Dec '09

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Re: Color shifting with r408
by Robert Monaghan 24 Dec '09

24 Dec '09

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Re: Color shifting with r408
by Darrin Cardani 23 Dec '09

23 Dec '09

site_archiver(a)lists.apple.com Delivered-To: pro-apps-dev(a)lists.apple.com On Dec 23, 2009, at 2:32 PM, Robert Monaghan wrote: Darrin -- Darrin Cardani dcardani(a)apple.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Pro-apps-dev mailing list (Pro-apps-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/pro-apps-dev/site_archiver%40lists.a… 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). Can you be more specific? What matrices are you using for the conversion? Are you checking to see whether you're getting Rec 601 or Rec 709? Are both cases broken? This email sent to site_archiver(a)lists.apple.com

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Color shifting with r408
by Robert Monaghan 23 Dec '09

23 Dec '09

site_archiver(a)lists.apple.com Delivered-To: pro-apps-dev(a)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(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/pro-apps-dev/site_archiver%40lists.a… This email sent to site_archiver(a)lists.apple.com

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automated response
by Tommy Schell 17 Dec '09

17 Dec '09

site_archiver(a)lists.apple.com Delivered-To: pro-apps-dev(a)lists.apple.com I'm out of the office til January 4, 2010. For immediate assistance, please contact: mike (at) convergent-design dot com or call our office at ++720-221-3861 and ask for support. Tommy Schell _______________________________________________ Do not post admin requests to the list. They will be ignored. Pro-apps-dev mailing list (Pro-apps-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/pro-apps-dev/site_archiver%40lists.a… This email sent to site_archiver(a)lists.apple.com

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in24 vs. lpcm
by Mikey M 16 Dec '09

16 Dec '09

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FxPlug SDK 1.2.5 Released
by Darrin Cardani 16 Dec '09

16 Dec '09

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Odd Motion 4 XML error on multiple line text objects
by Martin Baker 12 Dec '09

12 Dec '09

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