9 Replies Latest reply on Aug 17, 2010 11:46 PM by Jon-M-Spear

    RE: Compositing and Roto Brush Tool

    animationlife Level 1

      framerate.JPG

      I am working with Roto Brush Tool. when I select my object, I see a Error Sign Regarding Mismatch frame rate.

      please look at my screen shot

      Thanks

      Simon

        • 1. Re: RE: Compositing and Roto Brush Tool
          Todd_Kopriva Level 8

          It's telling you exactly what you need to do. Set the compositon frame rate to match the frame rate of the footage item.

           

          This frame rate tip and others are here.

          • 2. Re: RE: Compositing and Roto Brush Tool
            animationlife Level 1

            Mr. Kopriva.

            Thank you for yur quick reply. My movie was shot in 30 fps, why should I change the frame rate to 59.94 ?

            • 3. Re: RE: Compositing and Roto Brush Tool
              Mylenium Most Valuable Participant

              My movie was shot in 30 fps

               

              Depends. There are cameras that always shoot 60fps and then tag the streams to produce otehr frame rates by suppressing inbetween frames and require proper settings for the faux pulldown. Also give some consideration to settings for fields. No matter what it is, it's probably easily solved by setting your footage interpretation correctly, which so far you haven't.

               

              Mylenium

              • 4. Re: RE: Compositing and Roto Brush Tool
                Todd_Kopriva Level 8

                It is as Mylenium says. If your camera shoots 30 frames per second (actually 29.97), then it's really shooting 59.94 fields per second.

                 

                If you have a footage item with interlacing or pulldown, you should certainly remove them.

                 

                The best way to make sure that your composition is set up correctly is to create your composition by dragging your footage item to the Create A New Composition button at the bottom of the Project panel. Then, you're guaranteed that the frame rates will match.

                • 5. Re: RE: Compositing and Roto Brush Tool
                  animationlife Level 1

                  Mr. Kopriva.

                   

                  I Created a new Comp, and I used 59.94 fps, and when i play my movie, i see the Not real time error. Here is my screen shots

                  Once again Thank you very much for all your helps

                  Simon

                   

                  Notrealtime.JPGcomposition setting.JPG

                  • 6. Re: RE: Compositing and Roto Brush Tool
                    Todd_Kopriva Level 8

                    That message in the Info panel that tells you that a RAM preview is not playing in real time is not an error, per se. It's just telling you that your computer isn't capable of playing that many frames per second back to the screen. If you need real-time RAM preview, then there are all sorts of other things that you can do, such as using a region of interest to only preview a specific area of the frames. There are many tips for increasing performance of RAM previews here.

                     

                    In general, if you're expecting things in After Effects to be real-time without making tradeoffs, then you're expecting the wrong thing.

                    • 7. Re: RE: Compositing and Roto Brush Tool
                      animationlife Level 1

                      I have HP 64, Window 7 with 9 Gig of Ram, 2 Gig HD.

                      simon

                      • 8. Re: RE: Compositing and Roto Brush Tool
                        Jon-M-Spear Level 4

                        After Effects is not designed as a realtime playback application.  It is quite usual to RAM preview your comps (keying 0 on the keypad).  This loads the comp into memory and then attempts to play back in realtime.

                         

                        The duration of the RAM preview depends upon how much RAM you have together with the complexity of the composition - to name but two.

                         

                        There are several ways to optimise RAM preview efficiency - such as preview resolution; Shift Preview: work bar coverage; etc, etc.

                         

                        HOWEVER...

                         

                        You have a point with the frame rate mis-match.  I have some SD footage on a Sony 570 which I know to be PAL 720 x 576 interlaced 25 FPS.  If I drag it onto the new comp icon, AE CS5 correctly creates a new comp at 25 FPS lower field.  However, Roto Brush also tells me that I have a frame rate mis-match and that I need to adjust the comp to 50 FPS.  This message vanishes once I've done as I'm told, but the footage is not 50 FPS - interlaced or non- interlaced.

                         

                        Any futher thoughts anyone?

                        • 9. Re: RE: Compositing and Roto Brush Tool
                          Jon-M-Spear Level 4

                          Todd, Mylenium, any views on this?  I have read the Roto Brush frame rate guidance, but it still doesn't put this issue to bed!

                           

                          "I have some SD footage on a Sony 570 which I know to be PAL 720 x 576 interlaced 25 FPS.  If I drag it onto the new comp icon, AE CS5 correctly creates a new comp at 25 FPS lower field.  However, Roto Brush also tells me that I have a frame rate mis-match and that I need to adjust the comp to 50 FPS.  This message vanishes once I've done as I'm told, but the footage is not 50 FPS - interlaced or non- interlaced."