Comments on: Fix QuickTime Gamma Shift http://www.videocopilot.net/blog/2008/06/fix-quicktime-gamma-shift/ A Blog by Andrew Kramer Thu, 09 Feb 2012 04:53:04 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: Cruz http://www.videocopilot.net/blog/2008/06/fix-quicktime-gamma-shift/#comment-271617 Cruz Thu, 29 Dec 2011 15:58:34 +0000 http://www.videocopilot.net/blog/?p=197#comment-271617 This problem has given me countless sleepless nights including this one. I thought I had finally found the solution with this, but I was wrong. I followed all the steps and it doesn't change anything. I even enabled FCS color compatibility and that only makes it worse. Can someone please help, because I can't take any more of this stress This problem has given me countless sleepless nights including this one. I thought I had finally found the solution with this, but I was wrong. I followed all the steps and it doesn’t change anything. I even enabled FCS color compatibility and that only makes it worse. Can someone please help, because I can’t take any more of this stress

]]> By: djwaterman http://www.videocopilot.net/blog/2008/06/fix-quicktime-gamma-shift/#comment-270251 djwaterman Sat, 17 Dec 2011 16:09:20 +0000 http://www.videocopilot.net/blog/?p=197#comment-270251 This H264 fix works, I've been doing it for a while now, but you get the same results by just choosing movie properties, highlighting the video track, and then just choose 'Straight Alpha' in the transparency box. You don't need to do the blend thing with the slider. And then just save the Quicktime file on top of itself. Andrew's way might be more correct in some way, but looking at two movies side by side I can't see any difference in quality at all. This H264 fix works, I’ve been doing it for a while now, but you get the same results by just choosing movie properties, highlighting the video track, and then just choose ‘Straight Alpha’ in the transparency box. You don’t need to do the blend thing with the slider. And then just save the Quicktime file on top of itself. Andrew’s way might be more correct in some way, but looking at two movies side by side I can’t see any difference in quality at all.

]]> By: Jeremy http://www.videocopilot.net/blog/2008/06/fix-quicktime-gamma-shift/#comment-252895 Jeremy Tue, 23 Aug 2011 21:24:47 +0000 http://www.videocopilot.net/blog/?p=197#comment-252895 Hey Andrew, great solution! Thx so much! QUESTION: The video FPS has dropped and is very choppy AFTER exporting (I do not mean stream playback). Also, it doesn't seem to retain the darks when using another player such as VLC. In the end I just want to upload to YouTube, so I wonder if the darks will hold or not. Cheers Hey Andrew, great solution! Thx so much!

QUESTION: The video FPS has dropped and is very choppy AFTER exporting (I do not mean stream playback). Also, it doesn’t seem to retain the darks when using another player such as VLC. In the end I just want to upload to YouTube, so I wonder if the darks will hold or not.

Cheers

]]> By: chase http://www.videocopilot.net/blog/2008/06/fix-quicktime-gamma-shift/#comment-239084 chase Wed, 27 Apr 2011 21:41:10 +0000 http://www.videocopilot.net/blog/?p=197#comment-239084 Hi - and thanx for continuing to host this tip using QT to correct gamma issues with .mov's and mp4's. I could use one for wmv's avi's and other file formats as well In searching for solutions, i found this post by Adobe: ProRes 4444 colors and gamma shift when working with After Effects CS4 and Final Cut Pro. and their solution: If you use Apple’s new ProRes4444 codec with After Effects CS4 and Final Cut Pro, you may notice a gamma shift (i.e., colors will seem to have too much or too little contrast) when you bring the movies rendered and exported from After Effects back into Final Cut Pro. To avoid this gamma shift, you’ll need to edit your After Effects CS4 QuickTime gamma rules XML file. This will add the appropriate gamma tag to your QuickTime files on output. The XML file is found here: [hard drive]/users/[user name]/Library/Application Support/Adobe/Common/MediacoreQTGammaRulesCS4.xml Using textedit.app or a similar text editor, add the following line to your MediaCoreQTGammaRulesCS4.xml file: ‘ap4h’ is the 4cc code for ProRes4444. You’ll notice that the XML file already includes entries for ‘apcn’ and ‘apch’. These are the 4cc codes for the older flavors of the ProRes codec. Once you’ve made this change, you should be able to round-trip ProRes4444 media between Final Cut Pro and After Effects without experiencing a gamma shift. Here is a direct link as he also goes into fixing it using AE CS3 in the comments section: http://blogs.adobe.com/toddkopriva/2009/12/prores-4444-colors-and-gamma-s.html and for AE CS5 users check this link given by the same: [ProRes 4444 and ProRes 422 in After Effects CS5".] http://blogs.adobe.com/toddkopriva/2010/05/prores-4444-and-prores-422-in.html Hi –
and thanx for continuing to host this tip using QT to correct gamma issues with .mov’s and mp4′s.

I could use one for wmv’s avi’s and other file formats as well

In searching for solutions, i found this post by Adobe:

ProRes 4444 colors and gamma shift when working with After Effects CS4 and Final Cut Pro.

and their solution:

If you use Apple’s new ProRes4444 codec with After Effects CS4 and Final Cut Pro, you may notice a gamma shift (i.e., colors will seem to have too much or too little contrast) when you bring the movies rendered and exported from After Effects back into Final Cut Pro.

To avoid this gamma shift, you’ll need to edit your After Effects CS4 QuickTime gamma rules XML file. This will add the appropriate gamma tag to your QuickTime files on output.

The XML file is found here:

[hard drive]/users/[user name]/Library/Application Support/Adobe/Common/MediacoreQTGammaRulesCS4.xml

Using textedit.app or a similar text editor, add the following line to your MediaCoreQTGammaRulesCS4.xml file:

‘ap4h’ is the 4cc code for ProRes4444. You’ll notice that the XML file already includes entries for ‘apcn’ and ‘apch’. These are the 4cc codes for the older flavors of the ProRes codec.

Once you’ve made this change, you should be able to round-trip ProRes4444 media between Final Cut Pro and After Effects without experiencing a gamma shift.

Here is a direct link as he also goes into fixing it using AE CS3 in the comments section:
http://blogs.adobe.com/toddkopriva/2009/12/prores-4444-colors-and-gamma-s.html

and for AE CS5 users check this link given by the same:

[ProRes 4444 and ProRes 422 in After Effects CS5".]

http://blogs.adobe.com/toddkopriva/2010/05/prores-4444-and-prores-422-in.html

]]> By: olly reid http://www.videocopilot.net/blog/2008/06/fix-quicktime-gamma-shift/#comment-236593 olly reid Mon, 28 Mar 2011 09:30:27 +0000 http://www.videocopilot.net/blog/?p=197#comment-236593 dammit... seemed to work. now when I reopen them the gamma has slid back... Thought it seemed to good to be true... dammit… seemed to work. now when I reopen them the gamma has slid back… Thought it seemed to good to be true…

]]> By: olly reid http://www.videocopilot.net/blog/2008/06/fix-quicktime-gamma-shift/#comment-236514 olly reid Sat, 26 Mar 2011 11:05:04 +0000 http://www.videocopilot.net/blog/?p=197#comment-236514 TWEAKED SOLUTION: After rendering into a QuickTime/h.264 file, open it up in QuickTime Pro and select “Show Movie Properties.” Highlight the video track then click on the “Visual Settings” tab. Towards the bottom left you should see “Transparency” with a drop-down box next to it. Select “Straight Alpha” from the same drop-down and close the properties window and finally “Save.” This will fix your gamma issue, but it could make your playback choppy. If so, re-open movie properties, under “transparency” select none. Re-save, you should still have your fixed gamma, but now your movie should play silky smooth again… Worked for me anyway! TWEAKED SOLUTION: After rendering into a QuickTime/h.264 file, open it up in QuickTime Pro and select “Show Movie Properties.” Highlight the video track then click on the “Visual Settings” tab. Towards the bottom left you should see “Transparency” with a drop-down box next to it. Select “Straight Alpha” from the same drop-down and close the properties window and finally “Save.”
This will fix your gamma issue, but it could make your playback choppy.
If so, re-open movie properties, under “transparency” select none. Re-save, you should still have your fixed gamma, but now your movie should play silky smooth again…
Worked for me anyway!

]]> By: Filipe Aparicio http://www.videocopilot.net/blog/2008/06/fix-quicktime-gamma-shift/#comment-234251 Filipe Aparicio Mon, 28 Feb 2011 07:22:01 +0000 http://www.videocopilot.net/blog/?p=197#comment-234251 Hey, I'm having the same problem as SteveJ... When I do this, if I import the footage back on After Effects, it will only show a green screen :S its weird cuz it only started doing this recently... I really need to find a way to fix this... I have 2 due dates that are pretty close and the client won't be satisfied if I can't fix this... Its seriously driving me crazy! Please someone... Anyone... Does anyone know how to fix this?? Thank you in advance Hey, I’m having the same problem as SteveJ… When I do this, if I import the footage back on After Effects, it will only show a green screen :S its weird cuz it only started doing this recently… I really need to find a way to fix this… I have 2 due dates that are pretty close and the client won’t be satisfied if I can’t fix this… Its seriously driving me crazy! Please someone… Anyone… Does anyone know how to fix this??
Thank you in advance

]]> By: Juan Pablo http://www.videocopilot.net/blog/2008/06/fix-quicktime-gamma-shift/#comment-233997 Juan Pablo Thu, 24 Feb 2011 16:08:30 +0000 http://www.videocopilot.net/blog/?p=197#comment-233997 Hi: Did anybody find the way to fix gamma on quick time X ??? Hi: Did anybody find the way to fix gamma on quick time X ???

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