4 Replies Latest reply on Oct 4, 2009 3:38 PM by Jim_Simon

    MPEG4 video from imovie is sluggish and audio out of sync

    SKMG

      Hi y'all,

       

      I am new to this. So I need some hand holding here. I am working with video that was exported in MPEG4 video from imovie on a mac.

      The Camera I used is a Sony FX7 HD camera with SD tape.

       

      So Now I am trying to edit the video using Premiere Pro CS3 creative suite.


      Import into CS3 is fine. Playing the imported video in the source monitor is fine as well. All looks well.

      However, here are the challenges I am having:

       

      1. When I try to play it in the Program monitor its very sluggish. Audio plays fine but picture lags behind.

      2. And once I edit the the video and try to export it as flash video or as a windows media, the video and audio are out of sync.
      The video is choppy as well.


      Details: source video is 720x480 and trying to export to 320x240
      My project details are:

      DV-NTSC standard 48khz

      Video is 10 min long

        • 1. Re: MPEG4 video from imovie is sluggish and audio out of sync
          the_wine_snob Level 9

          If you are working with SD material, I would suggest one of the two following workflows:

           

          1.) Capture in PrPro CS3

           

          2.) Capture in iMovie as MOV. using the Animation CODEC.

           

          There is nothing to be gained, and much to be lost using MP4. It is highly compressed and will require much to decode it for editing.

           

          I am assuming that you are on a Mac, hence my lack of reference to DV-AVI Type II. Now, if you ARE on a PC, then definitely Capture to CS3, and use DV-AVI Type II.

           

          Good luck,

           

          Hunt

          • 2. Re: MPEG4 video from imovie is sluggish and audio out of sync
            SKMG Level 1

            Thanks for the quick reply.

             

            I am actually using a PC. The files were delivered to me from imovie in MPEG from the mac.

            So at this point I have the files and no access to re-do things. So the question is where do I go from here.

            Since this is what I have.

            • 3. Re: MPEG4 video from imovie is sluggish and audio out of sync
              the_wine_snob Level 9

              OK, not my choice of workflows, but... I assume that the MP4's are H.264 encoded. There are many of these. Three common ones are Lead, MainConcept and Apple. Some find that one works better than the others. These are not the ONLY versions, but are common. You might want to explore others, depending on which one you have installed. G-Spot can tell you which you have.

               

              Next, you can Render your Timeline, to get things as smooth as possible.

               

              Note that the MP4 files are heavily compressed already. Quality has been lost, and there is nothing that can be done about that. When you Export to, say DVD, you will recompress that material, and loose even more.

               

              In the future, have your Mac-person do the Capture to .MOV [Animation CODEC]. Or, do it yourself to DV-AVI Type II w/ 48KHz 16-bit PCM/WAV Audio.

               

              Not sure of any other ways to get the MP4's playing more smoothly. Much will depend on both your CPU and on your system's I/O sub-system, i.e. your HDD's, their size, speed, controller type and how they are utilized.

               

              Good luck,

               

              Hunt

              • 4. Re: MPEG4 video from imovie is sluggish and audio out of sync
                Jim_Simon Level 8
                The files were delivered to me from imovie in MPEG from the mac.

                 

                Tell the client you need the original tapes.  What they gave you is simply unworkable.