FFMpeg producer parameters support?

Hello guys, I used to program myself to organize video sources and then live broadcast it, but I was so tired to implement complex functions until I found CasparCG, it is all what I need.

I need some function which can be done by FFMpeg parameters, but looking into CasparCG wiki, I don’t how to use FFMpeg parameters as producer (not as consumer)

for exmaple, I need "rtsp_transport tcp " for rtsp stream
when I do

play 1-9 rtsp://172.16.10.3:8554/vlc -rtsp_transport tcp 

rtsp video played, but still shows udp on the log, did I put it wrong or is it not supported?
any suggestion?

also, I will need to do 3d lut apply to video stream by using ffmpeg parameters later