3 Replies Latest reply on Apr 14, 2012 6:30 AM by J0hj0h

    What does "protecting existing frames" do? ("Vorhandene Frames schützen")


      I just imported a cut from Premiere into After Effects to do some color correction/grading and effects.

      Everytime that I want to render a RAM-preview it sais "protecting existing frames" (actually in German: "Vorhandene Frames schützen") in the info panel. This takes really, really long and doesn't seem to do anything.

      The only thing that could influence this time is the amount of layers (footage pre-comps, adjustment layers and text) as there are about 200.  There also are a few footage clips with just audio enabled.

      I'm running After Effects on a laptop with 4 GB RAM and a Core2 Duo.


      So my questions are:

      1. What does "protecting existing frames" do?

      2. Is there a way to bypass the time it takes?


      I thank you in advance!

        • 1. Re: What does "protecting existing frames" do? ("Vorhandene Frames schützen")
          Todd_Kopriva Level 8

          The English version of the message is "locking existing frames", and it indicates that After Effects is determining which frames are already cached into RAM before it begins the process of rendering new frames for RAM preview.


          Make sure that you've installed the latest updates. They fix a lot of problems, including one that caused the "locking existing frames" phase to take too long in some cases.


          If that doesn't help, then we need to know a lot more if we're going to help you. Please provide answers to the questions listed here: "FAQ: What information should I provide when asking a question on this forum?"

          • 2. Re: What does "protecting existing frames" do? ("Vorhandene Frames schützen")
            Mylenium Most Valuable Participant

            Actually I only ever have seen that message with multiprocessing, so maybe turn that off, if you are using it...



            • 3. Re: What does "protecting existing frames" do? ("Vorhandene Frames schützen")
              J0hj0h Level 1

              Sorry, I totally missed to add more information. So here it is:


              I'm using AE CS5 Version,

              Windows 7 64-bit Professional,

              I'm cutting the AVCHD clips from the camcorder (H.264 in mp4),

              my laptop has an Intel Core2Duo T8300 with 2,4 GHz,

              4 GB RAM,

              NVIDIA GeForce 9300M GS,

              no external hard drives.


              But now here's a big difference:

              I'm now using a (same Windows) desktop PC with an Intel i7 2600 Quad with 3,4 GHz (and Hyperthreading, so 8 virtual cores),

              I now have 16 GB RAM (4 GB are used as RAM-Disc, so cannot be used by programs),

              it uses a ATI Radeon HD 4600 graphics card.

              Also no external hard drives.


              On my desktop PC I now use the rendering of multiple frames. The locking occures there, too. What suprises me, is that it does that for a RAM preview, but the area it is supposed to render doesn't have any prerendered frames and is only 3 - 4 seconds long. So it defenitly tries to check every frame which is stupid.

              I just tried to empty the hole image cache. It still locks frames.

              It also disabled multiprocessing because of some effect or expression. So that doesn't seem to make a difference...


              I would highly appreciate if you also could quickly answer another question:

              What codec would you recommend instead of the slow H.264? I've tried some but none really worked. So tips are welcome!


              Thanks again!