alexfromwalthamstow
Level 1 (11 points)
Desktops

Q: Random frame glitches on exports, no matter what setting I use it seems...

Hi guys, lately I have been shooting video on my Canon 6D. I have imported it into FCP7, matched the video settings to the sequence, edited without problems but then when I export, it seems no matter what format I export in, I get these broken lines on random frames (I call them glitches). It just feels as if the video is always broken.

 

The glitches appear on the same frames each time I play the same file back but if I re-export the file, they might appear in a different place.

 

Sometimes videos I export play fine but rarely.

 

When I transfer the files to other machines, I still get the same glitches.

 

My editing machine (mac pro) is getting fairly old now (about 6/7 years) and I've had some services lately due to a couple of other issues but it's working fine in all other areas, so I'm wondering what this problem might be caused by?

 

Any advice is much appreciated, see the image attached for an example of the glitch. Thanks.

 

Screen Shot 2015-11-23 at 3.37.32 am.png

Mac Pro, Mac OS X (10.7.4), MacPro 3,1 Serial: CK807259XYL

Posted on Nov 22, 2015 7:46 PM

by Shane Ross,Solvedanswer
Shane Ross Shane Ross
Level 8 (43,004 points)
A:

I will hazard a guess to say that you didn't convert the footage from the camera to ProRes 422 first...before you imported into FCP.  Am I right? Because while FCP 7 APPEARS to work with that format...it really doesn't.  Mainly when you render or export. Glitches, sync issues are the most common problems.

 

You can try a quick fix...go into the Sequence Settings and change the render codec to ProRes 422...render everything, and then export.

Posted on Nov 28, 2015 12:52 AM

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alexfromwalthamstow

Q: Random frame glitches on exports, no matter what setting I use it seems...

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  • Helpful answers

  • by Shane Ross,Solvedanswer

    Shane Ross Shane Ross Nov 28, 2015 12:52 AM in response to alexfromwalthamstow
    Level 8 (43,004 points)
    Nov 28, 2015 12:52 AM in response to alexfromwalthamstow

    I will hazard a guess to say that you didn't convert the footage from the camera to ProRes 422 first...before you imported into FCP.  Am I right? Because while FCP 7 APPEARS to work with that format...it really doesn't.  Mainly when you render or export. Glitches, sync issues are the most common problems.

     

    You can try a quick fix...go into the Sequence Settings and change the render codec to ProRes 422...render everything, and then export.

  • by alexfromwalthamstow,

    alexfromwalthamstow alexfromwalthamstow Nov 23, 2015 3:55 AM in response to Shane Ross
    Level 1 (11 points)
    Desktops
    Nov 23, 2015 3:55 AM in response to Shane Ross

    I actually recently had a general error issue with footage direct from my 6D, so for safety, I've always exported the footage to HDV before using it in final cut. For me, that seemed to work most reliably. I think I tried ProRes before and had some issues.

     

    I've now done as you suggested and that seems to have worked, thanks!

     

    The only problem is exporting ProRes files are so big, I need this 7 minute video to be under 2gb.

     

    In future I will export my footage to ProRes rather than HDV and see how that goes.

     

    General errors terrify me, so I tend to work with what feels safe at the time! I think it's because my edit suite is getting old now, starting to have issues.

     

    It might be time to upgrade.

     

    Thanks for your advice. Any other comments on the above would be really useful.

  • by Shane Ross,Helpful

    Shane Ross Shane Ross Nov 28, 2015 12:54 AM in response to alexfromwalthamstow
    Level 8 (43,004 points)
    Nov 28, 2015 12:54 AM in response to alexfromwalthamstow

    HDV is almost the worse thing you can convert to.  First off, you are losing resolution by going from full raster 1920x1080 to anamorphic 1440x1080 (HDV doesn't do full raster, only anamorphic).  Second, you are going from a full frame format to a GOP format (3 real frames and then a Group of Pictures that "guess" at the other frames).  The codec has a lower data rate than ProRes because it's more compressed, a lot more information is tossed out.  Take that as you may.

     

    Yes, ProRes files are larger, because they are better quality, 10-bit, full raster.  There are lighter versions, like ProRes LT.  As for exporting...you export the ProRes master as your MASTER file...and then from there compress to H.264 for smaller size.  It's ALWAYS good to have a good, high quality master to archive, and then have compressed versions. 

  • by msajidjan,

    msajidjan msajidjan Nov 25, 2015 7:42 AM in response to alexfromwalthamstow
    Level 1 (5 points)
    Nov 25, 2015 7:42 AM in response to alexfromwalthamstow

    Dear alexfromwalthamstow

     

    FCP 7 is not familiar with h.264. first try converting bits before editing to Apple Proress (HQ or LT), I think this will resolve your problem.

     

     

    Regards,

    Sajid Jan

  • by alexfromwalthamstow,

    alexfromwalthamstow alexfromwalthamstow Nov 28, 2015 12:55 AM in response to alexfromwalthamstow
    Level 1 (11 points)
    Desktops
    Nov 28, 2015 12:55 AM in response to alexfromwalthamstow

    Hi guys. really helpful responses, thanks so much!

     

    A few months ago I had this general error issue whilst using ProRes and it was so annoying, because I'd done loads of editing and lost it all!

     

    Hence why I've been changing my formats but yeah it seems I've been losing quality that way.

     

    Anyway, this was all part of a 36 hour documentary making competition, so it's all learning!!!

     

    Thanks!!!!