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Digital hits, usually green blocks, on renders
Infrequently I’ll find digital hits in the shape of small rectangles, usually green, on rendered footage. They’ll be in a section of timeline, always play back in the same spot, can pause on them, export out, and have gone away when I clear cached renders. I would assume bad sectors on my external SSD, but not sure of a method to analyze the drive. SMART status doesn’t work on external USB, and Disk Utility doesn’t help.
Suggestions?
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7 Replies
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What kind of Mac and GPU are you using?
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Late 2013 Mac Pro D700s
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Unfortunately, this is a design flaw on that Mac. During heavy CPU and GPU usage, the computer is unable to dissipate heat fast enough thus can cause random corruption. I highly recommend keeping renders in short bursts to prevent heat build-up.
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Wow, I was sure it’d be a drive problem! I’ve got a utility that overrides the internal fan speed control, I wonder if there’s a utility to change the thresholds (the one I’ve got is just manual constant speeds).
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issue known for years –
https://macperformanceguide.com/blog/2015/20151212_1206-MacPro2013-BadVideoCard.html
https://forums.adobe.com/thread/1686261
bob Zelin
Bob Zelin
Rescue 1, Inc.
bobzelin@icloud.com -
Never ran across those articles, so thanks Bob.
For anyone reading this, there is a utility called Macs Fan Control, and there is an option to select any of the sensor points and adjust thresholds & fan speed. It was evident from sensor readings that on my MP ’13 the GPU 2 sensor was much hotter than 1, so I just adjusted the threshold way down. If it’s heat related, that’ll fix that. 🙂
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I run into this constantly with Adobe apps (2013 MP, 8-core, D500). Usually when I have higher res media like 4K footage. I almost never have a problem with FCPX or Compressor. Resolve is so-so. Again more likely with higher res outputs. I also run Mac Fan Control cranked to max speed. It helps, but is not a cure.
– Oliver
Oliver Peters – oliverpeters.com
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