17 Replies Latest reply on Apr 18, 2008 9:20 AM by (aslantam)

    RAM Preview NOT realtime

      We have purchased a new Dell Precision 690.

      2 x Quad Xeon X5355 2.66 Ghz Processors
      3.5 GB RAM
      Nvidia Quadro FX 4600 with 768 MB RAM
      AJA Xena LH I/O Capture Card (not hooked up to an external monitor)

      We have tried MANY different memory configurations but can't seem to get the RAM Preview to play in realtime. Our old Graphics PC has much less raw power and plays RAM Previews flawlessly.

      Is anyone else experiencing this problem? If so, what recommendations do you have for remedying this issue?

      Thank you.
        • 1. Re: RAM Preview NOT realtime
          Level 1
          What frame rate is your comp versus what it's playing back at?
          • 2. Re: RAM Preview NOT realtime
            Level 1
            The comp is 29.97 and it's playing back at less than 10 fps.
            • 3. Re: RAM Preview NOT realtime
              Level 1
              Wow. What length of time are you able to load into RAM?
              • 4. Re: RAM Preview NOT realtime
                Mylenium Most Valuable Participant
                Check the drivers of your AJA card and the AE sound configuration. Incorrect sound device assignment or hardware conflicts plus potentially issues with the external video preview have been known to cause otherwise inexplicable RAM preview lag.

                Mylenium
                • 5. Re: RAM Preview NOT realtime
                  Jonas Hummelstrand Level 2
                  Sounds like AE is bogged down by external previewing.
                  You can turn the "Preview to External Device" on or off by hitting Ctrl-/ (the "divide" character on the numerical keypad.)

                  PS. Having 8 CPUs and only 3.5 GB of RAM is really insufficient. Consider lowering AE's use to two cores for optimum performance (or add RAM so each core has at least 2 GB of free RAM.)
                  Here's how:
                  i http://www.generalspecialist.com/2007/02/troubleshooting-after-effects-7.asp

                  - Jonas Hummelstrand
                  http://generalspecialist.com/
                  • 6. Re: RAM Preview NOT realtime
                    Level 1
                    Perhaps I'm naive... but we're using a Windows XP 32-bit PC and I was under the understanding that XP can only handle a total of 3.5 GB of RAM. So would 2 GB/RAM per Core still be beneficial?

                    Thank you.
                    • 7. Re: RAM Preview NOT realtime
                      David Wigforss-Hv1BNN Level 2
                      Sounds like you should look into upgrading to Vista 64 in order to make the most of your 8 cores.
                      • 8. Re: RAM Preview NOT realtime
                        Mylenium Most Valuable Participant
                        >but we're using a Windows XP 32-bit PC and I was under the >understanding that XP can only handle a total of 3.5 GB of RAM.

                        It will use 4 GB, but it only reports 3.5 GB because some memory areas are locked. I agree with David,though - running an 8 core machine with an 32bit OS is like trying to run a Porsche with raw oil for fuel. It will never achieve its maximum performance. You may try to run multiprocessing for simpler projects, but it will literally choke your system and may be prone to crashing.

                        Mylenium
                        • 9. Re: RAM Preview NOT realtime
                          Jonas Hummelstrand Level 2
                          XPx64 is reportedly a more stable production OS than Vista64, as long as your hardware is up-to-date. To me, the >4 GB of RAM is actually the single best reason for OS X.

                          - Jonas Hummelstrand
                          http://generalspecialist.com/
                          • 10. Re: RAM Preview NOT realtime
                            Level 1
                            Thanks guys. I believe the concern we have with a 64-bit OS is that (and correct me if I'm wrong) Adobe doesn't support CS3 products running on a 64-bit OS. I could be very wrong. Also, other products and software we are running are not supported running under Windows XP 64-bit. Does anyone have any recommendations in this regard?

                            Thanks again.
                            • 11. Re: RAM Preview NOT realtime
                              Level 1
                              I know AE 8.0.2 is compatible with Leopard and that's 64bit. I assume CS3's multiprocessing is 64bit too, just the application and render engine are 32bit still. can anyone verify that? The plugin Nucleo Pro will do some amazing things on a 64-bit machine too.

                              AE7 ran okay on my XP64 machine last year. Just make sure you get a video card that's got WELL KNOWN good drivers w/ XP64 -- mine was supposed too work be but gave me troubles sometimes.

                              To get AE back on your leash:
                              skip "1" to play at 15fps or "2" to play at 10fps

                              I know that's not the answer you are hoping for but it will keep your audio in sync with the video.

                              You and I have very similar "NOT realtime" issues on machines with plenty enough power to playback a RAM preview in realtime, so I'm digging for a better answer too.
                              I started another thread 'cause it's just a different scenario.

                              Are you using AE7 or CS3?
                              • 12. Re: RAM Preview NOT realtime
                                Todd_Kopriva Level 8
                                > I assume CS3's multiprocessing is 64bit too,
                                > just the application and render engine are 32bit
                                > still. can anyone verify that?

                                No, it's not. The multiprocessing (Render Multiple Frames Simultaneously) feature merely works by creating one instance of the 32-bit After Effects application on each processor core and using those in parallel---each working on its own frame.
                                • 13. Re: RAM Preview NOT realtime
                                  David Wigforss-Hv1BNN Level 2
                                  "Not supporting" is different than "able to run on." By supporting a 64bit OS, I think they're required to be 64bit app. 32bit apps, like the CS3 Suites run fine on 64bit OS (actually, better than 32bit, since they can use up to 4gig per process). What other apps are you concerned with?

                                  It'd sure be nice if Apple released a 64bit version of QT...
                                  • 14. Re: RAM Preview NOT realtime
                                    Level 1
                                    Eric: We're using CS3.

                                    David: We have an AJA Xena I/O Capture Card and apparently this will not work under the 64-bit version of Windows XP.

                                    Our IT person isn't comfortable running a 64-bit OS with software that isn't officially supported by the software/hardware manufacturers (even if they do run well on a 64-bit OS). I guess we'll just have to suck it up and deal with the 'Not Realtime' problem. It just makes no sense that on other machines not as 'beefy' as this running AE CS3 in our building that we do not have this issue.

                                    Thanks again.
                                    • 15. Re: RAM Preview NOT realtime
                                      David Wigforss-Hv1BNN Level 2
                                      Not sure which Aja Xena model you have, but apparently they just released drivers for Vista 64bit.

                                      And MS also just released Vista SP1.

                                      My coworker has a Blackmagic card running under XP64. He said it was a helluva time finding drivers, so I understand that it might be hard finding XP64 drivers for your Aja card.
                                      • 16. Re: RAM Preview NOT realtime
                                        Jonas Hummelstrand Level 2
                                        Decklink drivers for XPx64 has been a link on
                                        i http://www.decklink.com/support/
                                        for as long as it has been available.

                                        The Xena driver (3.1) requires XP, Vista or Vista64.

                                        - Jonas Hummelstrand
                                        http://generalspecialist.com/
                                        • 17. Re: RAM Preview NOT realtime
                                          Hey Scott,

                                          I have the same problem- it is the Xena LH card- there is a specific problem with a conflict between the LH card and RAM preview in CS3. AJA are working on a fix (no delivery date yet) I have found a workaround- not ideal but needs must. If you disable the AJA card in Windows hardware manager- RAM preview will then work fine. When it comes to digitize- re enable the card...

                                          Cheers

                                          Aslan