10 Replies Latest reply on Nov 26, 2012 2:09 PM by Krunska

    Keylight Issues


      Greetings to all,


      I was doing some exercises with Keylight and noticed that when selecting the effecting, the eye dropper is not working. I have to select a colour and then place the eye dropper in order for it to work. The screen then begins to flicker when i put my eye dropper over the selected area that I want to mask.


      Please check this link to help you better understand my problem: http://www.youtube.com/watch?v=fCW2ompAkbw&feature=youtube_gdata

      I look forward to your reply.



        • 1. Re: Keylight Issues
          Todd_Kopriva Level 8

          We need to know a lot more to help you. Please provide answers to the questions listed here:


          • 2. Re: Keylight Issues
            Krunska Level 1
            • What version of After Effects? CS6 with latest updates
            • Have you installed the recent updates? I have the recent version of all updates on my system
            • What operating system? Mac OS X 10.7.5 (11G63)
            • What kind(s) of source footage? AVI file, but i have also used MOV and MP4 and it still has the same issues
            • I am not receiving any error issues
            • I was trying to remove the blue from the background mask with EFFECT>KEYLIGHT
            • I have just discovered this issue as I was not doing any Keying up until now
            • Photoshop, Premier
            • I have a few, Red Giant, Video Copilot - Optical Flares
            • Tell us about your computer hardware. Include CPU type and number of processor cores, amount of RAM installed, GPU, number of disk drives, and how any external drives are connected.
            •   Model Name:iMac
                Model Identifier:iMac12,2
                Processor Name:Intel Core i7
                Processor Speed:3.4 GHz
                Number of Processors:1
                Total Number of Cores:4
                L2 Cache (per Core):256 KB
                L3 Cache:8 MB
                Memory:32 GB

            AMD Radeon HD 6970M:


              Chipset Model:    AMD Radeon HD 6970M

              Type:    GPU

              Bus:    PCIe

              PCIe Lane Width:    x16

              VRAM (Total):    2048 MB

              Vendor:    ATI (0x1002)

              Device ID:    0x6720

              Revision ID:    0x0000

              ROM Revision:    113-C2960K-205

              EFI Driver Version:    01.00.577



              Display Type:    LCD

              Resolution:    2560 x 1440

              Pixel Depth:    32-Bit Color (ARGB8888)

              Main Display:    Yes

              Mirror:    Off

              Online:    Yes

              Built-In:    Yes

              Connection Type:    DisplayPort


              Resolution:    1920 x 1080 @ 60 Hz

              Pixel Depth:    32-Bit Color (ARGB8888)

              Display Serial Number:    Q9C0715B0036

              Mirror:    Off

              Online:    Yes

              Rotation:    Supported

              Interlaced:    Yes

              Television:    Yes

            • Do you have any third-party I/O hardware (e.g., AJA, Matrox, Blackmagic, MOTU)? No
            • Are you using OpenGL features in After Effects? Motherboard is inbuilt - I believe the answer is Yes
            • Does the problem only happen with your final output, RAM preview, or both? RAM Preview only
            • Are you using Render Multiple Frames Simultaneously multiprocessing? No
            • What is the exact sequence of steps that you are taking
            • - I am selecting Effects
            • - Choosing Keying --> Keylight
            • - clicking on the eyedropper - nothing works
            • - click on the colour - the colour gradient appears, i then use the eye dropper from this area
            • - the screen begins to flicker as i move over the areas for keying
            • - when the blue area is transparent i release finger of mouse button.


            Hope this helps... let me know if you require more info.

            • 3. Re: Keylight Issues
              Pierre Devereux Level 2



              I experienced something very similar a while back, when still using my MAC. I was able to get it to work (and this is not a solution, merely a frustrating way of getting it to work) by franticly double clicking on the eye dropper - it eventually selects and you can continue to use keylight as usual. I do not know what caused it, and it did not happen every time I used the effect. Also, since moving over to my new PC and installation of After Effects, the issue has not returned.


              Good luck.




              (I assume the background starts to "Flicker" because it is updating live - the colour you are hovering over on the palette is being keyed out as you move the pointer around)

              • 4. Re: Keylight Issues
                Dave LaRonde Level 6

                I'm not 100% convinced that mp4 video works each and every time in AE 11, despite marketing literature that may lead one to believe the contrary. 

                Try transcoding the original footage clip to Quicktime's PNG codec and see if it helps.

                • 5. Re: Keylight Issues
                  Krunska Level 1

                  Hi Pierre. 


                  I am definitely not going back to PC. I don't know how you could go back to PC after working with MAC 


                  You're right in regards to the double clicking.. it works.


                  I will keep working with the keying as it is for now until there is an update.


                  Thanks for getting back to me.. appreciated.

                  • 6. Re: Keylight Issues
                    Pierre Devereux Level 2



                    Glad to be of assistance - the rest of the guys here have helped me out so many times, it feels great to be able to give a reply that works in a manner of speaking of course!)

                    Try not to wear out the mouse buttons while keying so long! I admit that certain tasks were easier on the MAC, and there were fewer glitches as such - but the price here in good 'ol South Africa made the decision easy. A pc, twice as mpowerful, costs less than half the price of a MAC here - and we get no support. As per the MAC support, the S.A. app store does not have all the apps, even the OS updates are not available on the S.A. app store - I needed to create an American account.

                    Anyway, each to their own....

                    Good luck, and keep checking back to the forums!

                    • 7. Re: Keylight Issues
                      Dave LaRonde Level 6

                      I am definitely not going back to PC. I don't know how you could go back to PC after working with MAC 


                      It's just a computer.  Besides, if you get married to a Mac, you're taking it as an article of faith that Apple Computer of Cupertino, California will continue to manufacture desktop computers capable of undertaking professional video and effects production. 


                      Look three to five years into the future and tell me what you see....

                      • 8. Re: Keylight Issues
                        Pierre Devereux Level 2

                        True Dave,


                        I have been a computer IT specialist on desktop and servers my entire adult life - only moved from IT to film March this year, and take it from me - in three years time - all technology changes!


                        It is best to keep an open mind, and if an individual has a favoured platform - very little will persuade them to change, as both have just as many good and bad points (if you look hard enough).





                        • 9. Re: Keylight Issues
                          Dave LaRonde Level 6

                          You should know I used to be a 100% Mac guy, Pierre. 

                          I'm now more agnostic in light of Apple's bonehead moves over the past year or two.

                          • 10. Re: Keylight Issues
                            Krunska Level 1

                            Pierre and Dave - have no intention to marry the mac    And yes.. it is just a computer.. but i am finding my workflow is more stable and quicker since switching. I am enjoying the mac system. There are certain things on the PC that I miss.. but i can live without them for the moment.

                            To everyone that helped with the aftereffects issue.. really appreciated.


                            Enjoy life and hopefully will be able to give more input from my experiences in the future.