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July 5th, 2016, 02:11 PM
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#1 |
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Regular Crew
Join Date: Sep 2008
Location: Edinburgh Scotland
Posts: 58
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Pixel burst problem on FCPX
Does anyone know what could be causing this? Get a burst of pixels on the first frame of a clip on the timeline now and again. It's in the exported file as well. Any ideas?
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July 5th, 2016, 02:29 PM
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#2 |
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Inner Circle
Join Date: Jan 2013
Location: Austin, Texas
Posts: 2,006
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Re: Pixel burst problem on FCPX
Jon, what Mac are you using? Mac Pro 2013?
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July 5th, 2016, 02:58 PM
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#3 |
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Trustee
Join Date: May 2007
Location: Minneapolis, MN
Posts: 1,313
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Re: Pixel burst problem on FCPX
Happens to me from time to time when viewing certain kinds of footage like AVCHD and XAVC. Not sure why.
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July 5th, 2016, 04:00 PM
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#4 | |
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Regular Crew
Join Date: Sep 2008
Location: Edinburgh Scotland
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Re: Pixel burst problem on FCPX
Quote:
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July 5th, 2016, 04:02 PM
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#5 | |
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Regular Crew
Join Date: Sep 2008
Location: Edinburgh Scotland
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Re: Pixel burst problem on FCPX
Quote:
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July 5th, 2016, 11:11 PM
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#6 |
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Major Player
Join Date: May 2011
Location: Knoxville, Tennessee
Posts: 495
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Re: Pixel burst problem on FCPX
I've seen this at times editing 4:2:2 10 bit XAVC-L clips natively in FCPX. It seems to happen more often when I've applied a transition or something and tried to play it before it renders. It's like the drive can't read the source fast enough and it corrupts one frame of the clip. And, I have the current fastest iMac with 4GB GPU with a RAID 0 as media drive.
I've never seen it in source footage though, and can usually fix it by just replacing the clip in the timeline with the source clip. |
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July 6th, 2016, 12:01 PM
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#7 |
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Inner Circle
Join Date: Dec 2005
Location: New York City
Posts: 2,650
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Re: Pixel burst problem on FCPX
Is this the first frame of the source clip or the first frame of the trim on your timeline? Is it consistent with the same clips every time or does it crop up randomly every time you export? Usually blocks like this are from an compression decoding error, as if the key frame isn't there or isn't being read.
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William Hohauser - New York City Producer/Edit/Camera/Animation |
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July 7th, 2016, 02:35 AM
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#8 |
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Regular Crew
Join Date: Sep 2008
Location: Edinburgh Scotland
Posts: 58
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Re: Pixel burst problem on FCPX
It does seem to crop up on the first frame of the same clip. Do you reckon transcoding to pro res might help things along? Will give it a shot I reckon.
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July 7th, 2016, 03:12 PM
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#9 |
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Inner Circle
Join Date: Dec 2005
Location: New York City
Posts: 2,650
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Re: Pixel burst problem on FCPX
None of my camera footage has ever had this problem but I have received files that do the same error on the very first frame of the clip. I wish I could tell you what camera those files were from. I also received footage from a camera that was clearly malfunctioning and the files had random blocky patches from an encoding error.
If you trim two frames in, does the error go away? ProRes might help.
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William Hohauser - New York City Producer/Edit/Camera/Animation |
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July 19th, 2016, 03:30 PM
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#10 |
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Regular Crew
Join Date: Sep 2008
Location: Edinburgh Scotland
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Re: Pixel burst problem on FCPX
Encoded the XAVC to pro res and all was well. Just something about the native footage that was causing a problem. It is possible to trim the frame out and it's OK but I'd rather take the hit on storage space and not waste time messing around with frames in the edit.
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