Request for encoding framerate option

[lsr1006]

It would be nice to be able to choose a framerate to record at, similar to the "--encode-resolution" option for resolution. I have a 170 Hz 1440p monitor but I really only want my recordings to be at 60 FPS. I have the bit-rate cranked up quite high to maintain the quality at this framerate which ends up making the file sizes too large for my liking. I don't want to downscale the resolution or sacrifice visual quality, reducing the FPS is really what I would prefer. I usually transcode clips down to 60FPS afterwards anyway, but it would be nice to not have to do that and not have to worry about available space while recording.

If this is already possible, my apologies. I didn't see any way with the current options.