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Video drops frames once in timeline

269 Views 8 Replies Latest reply: Nov 16, 2012 6:01 PM by thumperthumb RSS
thumperthumb Calculating status...
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Nov 16, 2012 4:29 PM

I am working on video from multiple different cameras. The footage that's giving me trouble, (or the footage that's being troubled by Final Cut) is from my Canon XA10. The raw footage has no problems, even when I watch it through the preview part of Final Cut in the events menu. However, when I put it into the timeline, it drops frames for a few seconds at a time every 30 seconds or so. This problem was perpetual through the entire clip until I discovered that the working file was set to 23.98, and the footage was shot at 24p, but having already fixed that, I am still getting the intermittent frame droppage. I also want to add that this problem is recent, and that I'd never had to deal with this until the last couple of projects I started working on. I think it may correlate with recent updates. Is anyone else having this problem? Am I missing something?

iMac, Mac OS X (10.6.8), Mac is from roughly 2006
  • Tom Wolsky Level 10 Level 10 (104,630 points)
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    Nov 16, 2012 4:50 PM (in response to thumperthumb)

    Fixed it?


    The camera shoots 23.976, which FCP calls 29.98. The camera doesn't shoot true 24fps, very few video cameras do.


    Dropped frames are usually caused by the hard drive not being fast enough for the media.

  • Tom Wolsky Level 10 Level 10 (104,630 points)
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    Nov 16, 2012 5:32 PM (in response to thumperthumb)

    Yes, I did.


    I don't know what the Canon usage means. Every company has its own terminology.


    The size of the Nikon sensor isn't relevant. Only the data rate matters.


    Drive problems can develop as the drive fills and the arm needs to move closer to the center of the platter or as the drive becomes fragmented.


    What kind of drive is it exactly and how is it connected?


    Frames dropping in the same place in either the original media or the exported file is more worrying. Not sure what you did to fix the 23.98 media, but that may have been contributory.

  • Meg The Dog Level 6 Level 6 (9,370 points)
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    Nov 16, 2012 5:43 PM (in response to thumperthumb)

    On the Canon XA10, recording in 24P will record at a true 24 Progressive frame rate (23.98). All the other framerates are recorded at 60i. From the manual, note the asterisk:




    thumperthumb wrote:

    Also, if the problem is my hard drive, why would it start doing this only recently, since I haven't had this problem before?

    As a drive becomes fuller, it slows down. If you have been accumulating media on the drive, the performance will be affected.



  • Tom Wolsky Level 10 Level 10 (104,630 points)
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    Nov 16, 2012 5:48 PM (in response to thumperthumb)

    The internal hard drive should never be used. Always use a dedicated media drive, SATA, FireWire, Thunderbolt, or USB3.

  • Alchroma Level 6 Level 6 (16,880 points)
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    Nov 16, 2012 5:50 PM (in response to thumperthumb)

    I see you use a 2006ish iMac?


    That's going to be a contibutor to "go slow" as well.




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