Renders that fail

Why do renders often fail?
'Recording failed with Error : Failed to encode the video frame.'
It will render fine in 2K, but same timeline fails in 4K. Its all shot in 4K.

Could be your GPU. Which one is it?

iMac Pro (2017)
3.2 GHz Intel Xeon W
32 GB 2666 MHz DDR4
Radeon Pro Vega 56 8176 MB

[Peter Chamberlain]

What drives are you using for source and destination?
What files for source and destination?
Can you grab a diagnostic log from the help menu?

Why do renders often fail? 'Recording failed with Error : Failed to encode the video frame.' It will render fine in 2K, but same timeline fails in 4K. Its all shot in 4K.

What happens if you reduce the render speed? Sometimes 25fps will work better than "Maximum," and often 10fps will work more reliably than 25fps. With a lot of NR and/or OFX processing, you may need to back off on the render speed a bit, particularly at 4K.

Drive speed is also a factor. How does your system measure up with the Blackmagic Disk Speed test?

BLK magic speed tests are off the clock fast. Thunderbolt 3 drives, directly into a iMac pro. Three weeks ago it would sail through, render a 24 min 4K show in about 10 mins. I will try and slacken the speeds and see what happens.

Slowed render speeds to 25fps. No change. will not complete render. getting desperate. Deadline is in 24 hours.

I have downloaded a diagnostic log. I need to know what to do with it. I need step by step please. Miss out nothing. I'm an editor, not an IT person. thanks

worst comes to worst, run it out as DPX, and pick up the export where it failed keep going in chunks until you have it all - then open the DPX in something / anything, and master from there

this is not normal behavior for Resolve, it's typicaly rock solid, esp exports and renders

when i've had that error in the past it's usualy about disk access, either read -or- write

[Peter Chamberlain]

Andrew, put the diagnostic log on dropbox, make a link and post the link on this thread.. leave a space in the path so the forum does not recognize it as a link