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Dropped Frames During Render
I have an approximately 110 minute timeline to render from Resolve 9.0.1. I am experiencing occasional frame drops in the final ProRes export file (one single black frame at a time). It seems that the dropped frames decrease when I use a slower render speed, however I have attempted a render at 2 frames per second and still am getting a few dropped frames.
I’m using a fast RAID, New Mac Book Pro with 16GB RAM. My system does not struggle with any other video intensive applications.
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15 Replies
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Are these frames always the same ones or are they random?
What’s your gpu and what is your timeline resolution?
Editor/Colorist, Amsterdam, The Netherlands
http://www.pepijnklijs.nl -
The frames are random each time. I can see the frame drops in the Resolve viewer window as its rendering. This is what leads me to believe it may be software releated, but DaVinci support does not have an answer. They felt it may be hard drive related, but I experience no issues with other video software rendering. I’ve also tried using separate high speed drives for read and write.
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You are running out of GPU RAM, this is causing black frames. Make sure you quit all other apps, and do a fresh boot before you start Resolve.
Which exact MacBook Pro model do you have?
Colorist | Online Editor | Post Super | VFX Artist | BD Author
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I think the same as Juan, thats why I was asking about your gpu and your resolution.
Editor/Colorist, Amsterdam, The Netherlands
http://www.pepijnklijs.nl -
Thank you very much for the reply. This sounds like the right cause for the the frame drops. I have late 2012 2.7Ghz Intel Core i7 with 16GB Ram. Graphics specs are NVIDIA GeForce GT 650M 1024 MB
I’m using the Black Magic Ultra 3D Studio playback box.
Are you aware of any work around if indeed the GPU Ram is causing the dropouts? I did a render at 2 frames per second, but still got a few dropouts. I am unable to upgrade the graphics card, and on a time sensitive project.
My recent thought was to go through and manually mark shots that have dropouts and re-render individual problem shots. Then assemble a final in Avid Media Composer.
thanks again
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The system GPU Ram is low compared to high end cards — 1024MB NVIDIA GeForce GT 650MT built in card.
Resolution is 1920×1080. All footage is 10 bit ProRes 4444.
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I should also clarify that the frame drops are burned into the render — the frame drops are not occurring due to playback of the exported file.
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All I know is that you need to have more than 2gb ram gpu to render out 4k images, which is not the case here…
Maybe Juan can help you out.
The thing I would try is:
A. Export to something else and see if that helps, ie dpx.
B. Try to export portion by portion of your timeline instead of the whole thing at once
C. Worst case; convert your source footage to something more lightweight, pro res hq for example and reapply the gradesEditor/Colorist, Amsterdam, The Netherlands
http://www.pepijnklijs.nl -
A correction: These are not dropped frames, but single black frames being inserted.
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