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  • Weird frame rate issue

    Posted by Dylan Hargreaves on April 5, 2011 at 10:37 am

    Hi,

    Got a project with a bit of an odd workflow which has thrown up a bizarre problem. My side of the project was to film a presenter speaking to camera and subtitle it, which was then sent to a designer from a different company for comping with some animations. (New client, should have used us for both aspects of the job, but there you go…)

    So. The designer needed to have the subtitles as a separate layer, ie, not burned on to the presenter clip. So I exported the presenter as 25fps pro res, and exported the subtitles as a 25fps animation, (With alpha).

    The subtitle clip name is suffixed with the exact frame number where the subtitle should begin. So all the designer has to do is line the subtitle up to the corresponding frame on the presenter clip and voila, the subtitles should – and in FCP do – sync up.

    However, they go completely out of sync in After Effects. If you go to the interpret footage panel, it says the frame rate is 1.042. What is this? And why is it not just 25fps? If I interpret the clip as 25fps in AE, it speeds it up 25x.

    So what’s going on here???

    Thanks in advance!

    Dylan Hargreaves replied 15 years, 1 month ago 37,830 Members · 3 Replies
  • 3 Replies
  • Dylan Hargreaves

    April 5, 2011 at 3:05 pm

    Hi Dave,

    Think I left out a vital piece of the information – I had originally intended this for the FCP forum before thinking it was more of an AE issue.

    The presenter clip and the subtitle were done, and exported from FCP – the subs using QT conversion.

    It’s importing them into AE where the 25fps becomes 1.042 for some reason…

  • Dylan Hargreaves

    April 5, 2011 at 3:14 pm

    Sorry.

    The codec of the presenter clip is ProRes

    I’m running AE CS5

    The subs were created using the outline text generator inside FCP, then duped into their own timeline and exported as animation, millions of colors+

  • Dylan Hargreaves

    April 7, 2011 at 8:25 pm

    The problem appears to be something to do with FCP and how it handles alpha. I’ve had some weirdness before with that.

    The subs were leaving me as animations, mills col+ at 25fps, but going into the designer’s AE at this strange 1.042 frame rate.

    I tried exporting as h264, with no alpha and told the designer to set the comp mode to screen. Voila, the subs import at the right frame rate.

    It may also have had something to do with me being on mac and him being on pc, but either the issue has been worked around, if not exactly resolved.

    And a pain in the ass for me who had to re-export 50 odd subtitle clips at h264…

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