how can i enable b_ref_mode=0 through muxer settings

[PranshuTG]

i have tried to put in a value to pass to ffmpeg in the muxer settings, an equivalent to the -b_ref_mode option for the nvenc encoder.
The problem is that a few months ago a change was made to ffmpeg where i need to pass the option

-b_ref_mode=0

to ffmpeg to use my nvidia card with h265. I'm having trouble passing the option through OBS studio, any ideas?

 

[rockbottom]

Set in Video Encoder Settings without the dash. Setting is Disabled.

b_ref_mode=0