3 Replies Latest reply on Jul 19, 2017 2:40 PM by Rick Gerard

    choppy/slow 60fps footage

    Redcritimo Level 1

      I have this 60fps footage that is 1920x1080p, I have a proxy of it, and for some reason, the footage would still be choppy, this is weird, because whenever I have a proxy file of the same type on a 4k original footage it would not lag...

      And it would not lag on PP too with that type of proxy, here is a pic:

      2017-07-19 02_18_27-Adobe After Effects CC 2017 - E__Documents_After Effects_Dedoudblement Gto.aep _.png

      (not yet interpreted at 30 fps in the screenshot)


      I tried interpreting the original footage and the proxy at 30fps, it is still choppy

      I tried changing the playback speed at 30 or 60fps, it is still choppy

      I tried changing the framerate of the comp to 30/60fps, it is still choppy

      I tried changing the preview size to a quarter, it is still choppy


      It is not veeery choppy but enough to be disturbing...

        • 1. Re: choppy/slow 60fps footage
          Mylenium Most Valuable Participant

          Well, you inflated the audio to 32bit, did you not? It might be a good idea to not mess with that, especialyl with AE not being very good at audio processing to begin with and even your system's hardware CoDecs may not like it.



          • 2. Re: choppy/slow 60fps footage
            Redcritimo Level 1

            With adobe media encoder how can you choose to keep the same audio bit depth when you're making a h264 proxy file ?

            • 3. Re: choppy/slow 60fps footage
              Rick Gerard Adobe Community Professional & MVP

              I said this all in another thread you posted on the same subject but I'm repeating it for folks that didn't see that thread.


              Referring to an H.264 proxy file makes me nervous. Do you know what proxy files are used for? Do you know that h.264 or any MPEG format takes more CPU power to decode for processing or editing than a visually lossless format does? Do you know that it is harder for After Effects and Premiere Pro to generate previews from h.264 files than many other formats. Do you know that you will build up significant compression artifacts, loose resolution, loose color fidelity and potentially have a bunch of other problems if you render a project from a highly compressed proxy?


              The only reason I can think of for rendering a proxy file is to generate a smaller frame sized file that is easier to handle when your are editing or animating. That smaller file should be in a format that takes the least amount of work to decode and render previews. When the editing and animation is complete you would then replace the proxy file with the original for rendering.