3 Replies Latest reply on Sep 29, 2013 7:45 AM by joe bloe premiere

    Weird color artifacts after 3 way color correction

    nettarb

      A student of mine is doing a color correction exercise and imported  quicktime .mov files to color correct.  Once she applied the 3 way color corrector very strange color artifacts showed up in some of her clips -- one looks like a green screen with the corner torn away edged in the lower right hand corner with festive diamond shaped green and magenta diamond shapes and only a tiny corner of the video is left that looks 'normal' in the lower right hand corner.

       

      Any ideas as to what is causing this?

        • 1. Re: Weird color artifacts after 3 way color correction
          joe bloe premiere Level 5

          First, what version of Premiere?

           

          System details are important.

          In particular, the display card make / model and driver version.

           

          Also, details regarding the quicktime file (codec, origin etc.) can help.

          Is the problem only associated with the one quicktime file, or

          does this problem occur using other media (including color bars

          generated from within Premiere)?

           

          A screenshot of the artifacts can be helpful.

          • 2. Re: Weird color artifacts after 3 way color correction
            nettarb Level 1

            Screen Shot 2013-09-27 at 3.05.30 PM.pngHi Joe Bloe.... Below is info you requested plus a screen shot.

             

            Version is CS6.

            ATI Radeon HD 4850:

             

             

              Chipset Model: ATI Radeon HD 4850

             

              Type: GPU

             

              Bus: PCIe

             

              PCIe Lane Width: x16

             

              VRAM (Total): 512 MB

             

              Vendor: ATI (0x1002)

             

              Device ID: 0x944a

             

              Revision ID: 0x0000

             

              ROM Revision: 113-B9110C-425

             

              EFI Driver Version:  01.00.383

             

              Displays:

             

            iMac:

             

              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

             

            Any thoughts?

             

            Thanks.....Clare (Nettarb)

            • 3. Re: Weird color artifacts after 3 way color correction
              joe bloe premiere Level 5

              Also, details regarding the quicktime file (codec, origin etc.) can help.

              Is the problem only associated with the one quicktime file, or

              does this problem occur using other media (including color bars

              generated from within Premiere)?