Frame rate issue from a SONY Handicam

[CKayJr]

Ok guys, maybe you Windows users can help. The Mac Forum blog has not even responded! I'm having slight jerky video motion coming from a Sony 4K handicam; HDMI to a BM G3 studio recorder (works great) to TB3 on my MacBook Pro (16 inch; 32 GB RAM; i9 Processor; 8GB video card; etc...). The machine is NOT the issue. It's a horse! My entire setup is only using 3% or less CPU. The actual frame-rate drops in OBS is very low - around .01-.02 percent of a 60 minute live stream. The Sony Cam is set for 1080/30p output. I have the same set in OBS. The bitrates are set the same. But yet, I still do NOT have smooth video. I'm using a very high quality HDMI cable (15 ft). I've swapped cables to just test. Still the same. It's not terrible, but it's like it's skipping every other frame or every few frames. The recorded video on an SD care on-cam is fine. Video quality is very good. Lighting is not a problem. Upload WiFi speed is 17-18 Mbps. Pretty good. It is a closed WiFi network so no-one else is using it. The problem is BEFORE it is streamed. I see the jerkiness in the OBS studio windows as well. Cam is using auto-focus and exposure. I've change the settings like 60p; or 59.97... it still does the same thing. I read something about a decimator. What is that? Would it help? Been doing this for months. I can't figure it out. Driving me nuts! )) P