3 Replies Latest reply on Feb 1, 2017 10:28 AM by djfilms9

    PROBLEMS WITH AE, KEYLIGHT AND MXF FILES

    djfilms9 Level 1

      I just taped in a green screen studio. The studio supplied MXF files for the video. I imported into AE CS6 on Mac El Capitan with an Nvidia GTX 980 Ti board, applied Keyiight, and saw a clean background alpha. When rendering the footage over a background graphic, occasionally a single frame shows a rectangular green bar, an artifact of the green screen. I applied a duplicate Keylight to the video in the video keying comp, and most times the artifact disappears, but not always.

       

      Anyone any idea of what the problem is? [And I'm not looking for Adobe to point the finger at The Foundry who points the finger at Apple who points the finger at Canon, who points the finger at Adobe, who points....]

        • 1. Re: PROBLEMS WITH AE, KEYLIGHT AND MXF FILES
          Rick Gerard Adobe Community Professional & MVP

          I have seen this kind of thing in the past and have been able to solve it by purging the cache. It happens most often with codecs that take a bunch of CPU power to decode like Canon's MXF and other formats. I even saw it a couple of times using CS6 and Arri RAW files.

           

          Let us know if the purging everything clears up the problem.

           

          If it doesn't you could always transcode the footage to a suitable 10 bit or better DI or render to an 16 bit image sequence. That's what I do with a lot of my keying work because I like the additional color depth and control and you can't beat image sequences for reliability.

          • 2. Re: PROBLEMS WITH AE, KEYLIGHT AND MXF FILES
            djfilms9 Level 1

            Rick,  many thanks for your clear and helpful answer. I had thought my next step was to export, although I had not thought to use image sequences. I'll also try the purge. Best regards.

            • 3. Re: PROBLEMS WITH AE, KEYLIGHT AND MXF FILES
              djfilms9 Level 1

              Rick: here's an update.

              Purging did not solve the all the green artifacts. I found that making identical duplicate Keylight effects on the footage did remove some of them (go figure). In one case, it took 3 copies of the identical copy of Keylight to avoid the green artifacts. I sidestepped the whole infuriating issue by first exporting the MXF files from FCP as ProRes, and then using Keylight in AE. No wonder I drink too much...  regards.