9 Replies Latest reply on Feb 26, 2010 2:37 PM by plrb

    Premiere Pro CS4 rendering unchanged files every time I open the project

    plrb Level 1

      Every time I open Premiere Pro CS4, it begins generating peak files for all of my imported AVI files. Even if I don't change anything and close and reopen the project 5 minutes later.

       

      If I try to play a multicam sequence while it is generating the files, it tries to render the preview -- the progress bar is moving, but it never seems to finish rendering.

       

      If I try to play a multicam sequence after it's done generating peak files, it will eventually play the sequence, maybe after 20-30 minutes.

       


      Any idea how I can get it to stop rendering constantly and having that red render bar on top?

       

      I have an imported 30-second clip from after effects in the beginning which has a yellow render bar.

       

      These are the AVI file specs according to QuickTime:

       

      FileType.jpg

      My project sequences are D1/DV NTSC (0.90.91), 720 x 480, 29.97 fps, 48000 Hz.

       

      Also, my footage without any editing using the multicam monitor and the original footage plays without rendering. And those are in the same project...

        • 1. Re: Premiere Pro CS4 rendering unchanged files every time I open the project
          Harm Millaard Level 7

          The yellow bar only means that this material does not meet the sequence settings, which is completely understandable when you use 720 x 480 resolution for your sequence and import 640 x 480 with square pixels.

          • 2. Re: Premiere Pro CS4 rendering unchanged files every time I open the project
            plrb Level 1

            Thanks, that makes sense.

             

            Would it help if I encoded those 640 x 480 AVI files into 720 x 480 in AME and then imported those into my project instead? Would that take care of the red line and repeated rendering?

            • 3. Re: Premiere Pro CS4 rendering unchanged files every time I open the project
              Harm Millaard Level 7

              The problem is that AVI is just a container and can contain all sorts of stuff. PR really likes when everything in that container is MS DV AVI type2 with 48 KHz stereo PCM/WAV audio. If it is anything else, you are better off with converting first. Use Google to search for a suitable converter.

              1 person found this helpful
              • 4. Re: Premiere Pro CS4 rendering unchanged files every time I open the project
                Wil Renczes Adobe Employee

                It's probably something specific to the source AVIs you're using.  Odds are that, if you either a) transcoded them into a new file, or b) brought in source material captured directly from a camera, you wouldn't be experiencing this.

                 

                The background:  PPro uses XMP technology when it comes to footage & metadata.  When it's rendering either preview files or PEK/CFA files for audio, it uses XMP's unique file identifier as part of the hash ID, as well as the modified timestamp of the source file.  The idea is that a preview or PEK/CFA file is valid until either a) the user makes an edit & the material needs rendering again, or b) someone directly edited the source material (like, an Edit in Audition operation where you're cleaning up audio background noise) and so again the previews and/or conformed audio files aren't valid anymore.

                 

                The hunch:  if XMP can't write into the file, things fall apart.  This could be either because a) the file is write protected, or b) XMP detects that the file internals of your source media have some kind of structural error and decides to play it safe & not inject data into the file.  If this happens, every time you open that project, a new random XMP ID is generated for that given source file, and this will make your previews & PEK/CFAs regenerate on every load.

                 

                One workaround that you can try:  in the prefs, there's an option somewhere to disable XMP write to media.  See if flipping that option off fixes your problem.

                 

                Cheers

                • 5. Re: Premiere Pro CS4 rendering unchanged files every time I open the project
                  the_wine_snob Level 9

                  Wil,

                   

                  Thank you for the "under the hood" look at things.

                   

                  if XMP can't write into the file, things fall apart.  This could be either because a) the file is write protected,

                   

                  One observation on other "working files," is that Windows Indexing will "lock" those files, while it attempts to do its indexing. This can take some time on large files, and Indexing will keep trying, even if there is no useful data in those files.

                   

                  In Photoshop, users have had issues trying to do a Save with large fies, if Indexing was busy with those files.

                   

                  I wonder if this could possibly be a contributor to your thought a.).

                   

                  Just thinking here,

                   

                  Hunt

                  • 6. Re: Premiere Pro CS4 rendering unchanged files every time I open the project
                    plrb Level 1

                    Thanks, Wil. I disabled write XMP ID to files on import, but it's still generating peak files every time I reopen the project without any changes made.

                     

                    BUT while staring at the file names as it generated those peak files, I noticed that one of my AVI files is only 32kHz, while the other two are 48kHz. Could that be the problem? My sequence is a DV NTSC Standard 48kHz, so one of the video imports doesn't match.

                     

                    I'm going to try a project with just the other two 48kHz AVIs...

                     

                    Or, is it even possible to re-encode the 32kHz to a 48kHz? I only use the audio track from the 48kHz one, so I don't mind if the sound quality won't be ideal.

                     

                    Alternatively, would I have the same issues with a standard 32kHz sequence with 48kHz files?

                    • 7. Re: Premiere Pro CS4 rendering unchanged files every time I open the project
                      the_wine_snob Level 9

                      Probably the easiest way to handle the 32KHz Clip is to Render/Replace, which will convert the instance to a PCM/WAV @ the Project's/Sequence's specs. If that does not solve the issue, then you can certainly convert the source material to 48KHz 16-bit PCM/WAV. One way to do this would be to set the WAB (Work Area Bar) over that Clip, and Export as DV-AVI w/ 48KHz 16-bit PCM/WAV. When done, Delete that original Clip from the Project Panel, and Import the newly Exported file, and drag it to the Timeline.

                       

                      Good luck, and hope that it'll help,

                       

                      Hunt

                      • 8. Re: Premiere Pro CS4 rendering unchanged files every time I open the project
                        Wil Renczes Adobe Employee

                        The audio sample rate won't have any bearing on PEK file generation - this happens for all audio sources (PEK files are what's used to display waveforms on the timeline - the idea is that the app only needs to generate this info once instead on every load like you're seeing).  Other than forcing a project save after you disabled the write on XMP option,  I'd probably go with Bill's suggestion with breaking out the audio into separate wave files.

                         

                        @ Bill:  I don't think Windows indexing is the problem here - I mean, yes, theoretically that could happen, but it should only index once in a blue moon.  The odds that the OS is indexing everytime the OP is opening his project are pretty slim.

                         

                        Cheers

                        • 9. Re: Premiere Pro CS4 rendering unchanged files every time I open the project
                          plrb Level 1

                          Thanks, that seemed to help somewhat. I did the Render/Replace, and then made sure I wasn't using the old clips anywhere else. But after closing and reopening the project, it's still generating peak files and rendering the sequence before I can play it. Not sure if it's because I created/edited those sequences before. I hate to have to re-create those multicam sequences, but if it works...