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25 Jan 2021
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Sometimes Final Cut will not render clips 20 Sep 2019 22:22 #101538

I have been staring at this screen for 5 mins and FCPX is not rendering those portions of the timeline.

This has happened before and I try clicking them or click the check box to open background tasks. Nothing really seems to actually affect it. It's sporadic.

I am on High Sierra 10.13.6 using FCPX 10.4.6

Is this a glitch? Is there something I can do?

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Sometimes Final Cut will not render clips 21 Sep 2019 02:05 #101539

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You have to invoke the rendering process either by selecting a clip (or clips) so that they become highlighted in yellow, and then from the menu bar choose "Render Selection". You can also click in the timeline so it becomes active, and then from the menu bar choose "Render All" to render the entire project timeline.

Alternatively, if you set "Background Render" to ON in the FCPX preferences (under the playback tab), then FCPX will begin rendering automatically after a preset delay of inactivity. This is not generally recommended as larger projects may incur corrupt render files as FCPX re-renders any changes made on the fly. I suggest leaving this option OFF, but just wanted you to be aware of the other way FCPX will render clips.

If the above doesn't solve your problem, try closing FCPX and re-launching it while holding down the OPTION and COMMAND keys to bring up the delete preferences dialogue - then choose ALL to delete all preference files. When FCPX starts, go back into preferences and turn Background Render OFF, as clearing preferences results in it automatically being turned ON. Report back if you're still having problems.
Creating history....one edit at a time !

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Sometimes Final Cut will not render clips 24 Sep 2019 16:48 #101616

I did indeed have background render on, which is why I was confused. However, due to your suggestions and others I think I am going to turn background render off. I will report back with how that goes while working on my current project with render set to OFF.

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Sometimes Final Cut will not render clips 24 Sep 2019 22:34 #101624

Hello,
I'm not a 100% on this but I think with background render on, FCP only renders what is necessary to have full fps playback. Certain codecs and/or effects can be processed in realtime so no need to render.

I agree though to have background off and render using the 'render selection' where necessary. Avoids a lot of processing because otherwise every little change would trigger a new render.

Best, Carsten

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Sometimes Final Cut will not render clips 23 Oct 2021 20:37 #116933

Hi there,

I am having this exact problem. I have one clip that just refuses to render even when I have selected it and used the render selection method. It is the only clip that is doing this and when I playback it judders. I am thinking of perhaps erasing it and restoring it. What do you advise. I am on FCP 10.6. Background render is off. Thanks in advance. Dawn

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