9 Replies Latest reply on Mar 22, 2011 4:03 PM by joe bloe premiere

    RAM preview questions

    joe bloe premiere Level 5

      1. Is there a way within the AE interface to monitor the amount
      of used / available RAM during an active RAM preview?

       

      2. Is there a way to display the number of  the frame that is currently
      being processed during the course of a RAM preview?

       

      3. Is there a way to initiate a RAM preview in reverse beginning
      from the current frame?  Alternatively, is there a way to initiate
      a "spacebar preview" in reverse beginning from the current frame?

       

      4. Is there a way to retain the processed frames of a RAM preview
      after making a timeline change that does not affect the already
      processed frames?

       

      Question 4 examples:
      -RAM preview first 120 frames, view result, extend the active
      work area to lengthen the RAM preview, the entire RAM preview
      needs to be re-rendered from beginning.
      -RAM preview first 120 frames, interrupt and view, activate hidden
      layer that begins at frame 100, the entire RAM preview needs to
      be re-rendered from beginning.

       

      thanks

        • 1. Re: RAM preview questions
          Mylenium Most Valuable Participant

          4. Is there a way to retain the processed frames of a RAM preview
          after making a timeline change that does not affect the already
          processed frames?

           

          Enable the disk cache. Cached frames play in near real time even without RAM previews.

           

          2. Is there a way to display the number of  the frame that is currently
          being processed during the course of a RAM preview?

           

          Info panel + timeline dispaly set to frames.

           

          Answer to 1 and 3: No.

           

          Mylenium

          1 person found this helpful
          • 2. Re: RAM preview questions
            J0hj0h

            First of all: I'm German, I make mistakes!

             

            I don't know any real solution for any of your questions, but I have some work-arounds:

             

            1. Is there a way within the AE interface to monitor the amount
            of used / available RAM during an active RAM preview?

             

            1. On Windows 7 you could look at the (I think it's called:) mini application on your desktop that indicates the usage of processor and RAM simply by hovering with your mouse over the little bar at the far bottom right, that shows the desktop. That's what I do!

            If your not comfortable with that (or not able to) then the only way I know to figure something out about the (possible) RAM usage is to look under the preferences in the "Memory & Multiprocessor usage" (or something similar, I own the German version...).

             

            2. Is there a way to display the number of  the frame that is currently
            being processed during the course of a RAM preview?

             

            2. Maybe you could insert a timecode effect. Just make a new solid and choose the effect from Text/Timecode.

             

            3. Is there a way to initiate a RAM preview in reverse beginning
            from the current frame?  Alternatively, is there a way to initiate
            a "spacebar preview" in reverse beginning from the current frame?

             

            3. I don't know any way to start a preview reversed, but you could set your work area to the area to want to preview (uncheck "From current time" option! That's what I didn't know How to limit RAM preview to the work area?! ) and also check the "looping option" in the preview panel to "ping-pong" (I don't know if they're called so...).

             

            4. Is there a way to retain the processed frames of a RAM preview
            after making a timeline change that does not affect the already
            processed frames?

             

            4. After Effects actually does exactly that! But it doesn't seem to know, if the layer is above or beneath the already rendered ones. Also if you change a keyframe it will re-render everything up to the next keyframes. But apart from that it does keep the rendered keyframes without re-rendering really, really unnecessary parts.

            I also just tried out extending the work are and it keeped the rendered frames. Maybe AE didn't had enough RAM to keep yours?

            • 3. Re: RAM preview questions
              joe bloe premiere Level 5

              Mylenium,
              Thanks for the reply.

              Enable the disk cache. Cached frames play in near real time even without RAM previews.

               

              I did have disk cache enabled (at the default value of 2000 MB),
              I assume this is conditional to the amount of disk space allocated
              and the requested resolution of the RAM preview.
              I have increased the disk cache size to 200000 MB (on a 1TB RAID-0),
              and I am having the same trouble.  The file in the AE cache disappears
              when I enable a new layer.

               

              After executing RAM preview:

              DiskCache_A.jpg

              After only enabling a hidden layer:

              DiskCache_B.jpg

              Info panel + timeline dispaly set to frames.


              During RAM preview, the info panel is only giving me the current comp name
              with layer and process information... no current frame number.
              Am I missing an option for the info panel somewhere?

               

              The frame number display in the timeline stays frozen at the current
              frame during RAM preview, during playback of a RAM preview and during
              spacebar playback.  It only updates to the current frame on spacebar stop.
              I am experiencing this behavior using frames, timecode and ft+frames.

               

              Answer to 1 and 3: No.


              Shucks!

              • 4. Re: RAM preview questions
                J0hj0h Level 1

                I just found out where to look for the current frame that is rendered:

                Unbenannt-1.jpg

                If you want to see the actual frame number and not the timecode Ctrl-click on the dark yellow (?) timecode display in your composition panel (it's not shown in the picture) until you see it the way you want it to be displayed.

                1 person found this helpful
                • 5. Re: RAM preview questions
                  joe bloe premiere Level 5

                  Thanks for the tip, but this counter is not visible during full-screen preview.

                  • 6. Re: RAM preview questions
                    J0hj0h Level 1

                    Then look at my previous post!

                    It's the second answer and I think it could eventually give you some tips!

                    • 7. Re: RAM preview questions
                      joe bloe premiere Level 5

                      2. Maybe you could insert a timecode effect. Just make a new solid and choose the effect from Text/Timecode.

                       

                      I appreciate your effort, but I don't think this is the solution.

                      • 8. Re: RAM preview questions
                        J0hj0h Level 1

                        I'm a bit confused; this is not ment to be offensive, but if you don't want a workaround, what do you want then? I am quite sure that there is no other way to show the current frame in fullscreen, even if I could possibly be wrong.

                        I think it is better to have an extra layer to show the current time than to not have it displayed at all!

                        But that's your decision!

                        • 9. Re: RAM preview questions
                          joe bloe premiere Level 5

                          Just so you will not be confused, I would like to be able to view a fullscreen RAM preview

                          using a two monitor setup while at the same time seeing the frame count in one of the

                          indicated locations as Mylenium had suggested I should be able to do.

                           

                          framecount.jpg