Massive stuttering with 10-bit color space recording

Splashpoint

New Member
Hello,

I am recording a 4K HDR input with a Blackmagic card in OBS. With the output recording type set to standard in Output > Type, it works great. However I want to take advantage of advanced audio encoders which are only available with the "Custom Output (FFmpeg)" recording type. However when I do this, I get massive/unwatchable stuttering in the output recording when the "Color Space" in Advanced > Video is set to a 10-bit option (Rec. 2100 (PQ) or Rec. 2100 (HLG)). If I set it to Rec. 709 the output recording is fine, but HDR is not enabled.

Any ideas on why this is? Thanks

Here is my log: https://obsproject.com/logs/duMxok8xyEnuQet9

Here are my current settings:

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