It's renders, then re-renders over and over again...

Okay, I cut a project and added some effects and it renders. It finishes rendering and I close FCX. The next day I open FCX and open the same project from the day before, and it starts rendering again. Why does it have to re-render everything again? What am I doing wrong?

Final Cut Pro X, Mac OS X (10.6.8), 2.66 Mac Pro, 16GB Ram, ATI 5770

Posted on Aug 24, 2011 6:52 AM

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21 replies

Jan 10, 2012 4:12 PM in response to Dirk Williams

I'm having the same issue at times but it seems random. Some days I boot up, open FCPX and nothing has to be re-rendered, and other days a full hour or more of re-render time is required.....usually it's just small clips but nerve racking when working under a deadline and you think you are done to say the least.


I'm not using raids, just firewire drives that are not disconnected when shutting down. This happened a few times when I was NOT copying media to the events folder, just referencing it from the original location.


More recently it happened in a project where I used the "copy the media to the event folder" option, however it happened after simply opening another project in the timeline, then going back to the original project in the timeline. Nothing was changed in either project while open and FCP was never shut down.


Trashing prefs seems to help with slowdown issues but doesn't have any effect on this. From my experience it seems fairly random.


Any updates on this would be appreciated.

Jan 10, 2012 8:40 PM in response to TRC1

I've had this issue as well. Stopped using FCPX for the time being, so can't comment too thoroughly, but here's what I've found… It seems that if rendering was the very last thing you did before shutting FCPX down, you will lose the connection to the render files. Probably just a database write issue. The workaround I found was, after you've rendered your project, make a small change like adding a clip then deleting it again. If you close FCPX now, then reopen, you should be fine. No dummy project switching needed.


I've tested this a few times and seemed consistent on my setup. Sent a bug report to Apple about it with this info already.

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It's renders, then re-renders over and over again...

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