Cortex V5.2 slow render

Since upgrading exports of UHD ProRes Dolby Vision 4444 appear to be 2-3 times slower.

Disk read test is showing connected volumes read write between 500-1000 MBps but writes are approx 9-11fps.

Render GPU M6000


In order to help troubleshoot the issue, the QA tool has a Performance tab that shows various metrics related to GPU, CPU and disk. Could you take a screenshot of this tab during playback of the source clip and also during the render to ProRes? You can send the screenshot to

Composition was configured with mismatched color-space from original file (P3 vs 2020). Once new composition was created the render time returned to realtime.