Thank you for the valuable advice.
I took a brief look at the code of the raspindi project you mentioned, and this is basically a simplification and modification of the raspivid base. The calls to NDIlib are added. Of course, this is a c++ program.
Based on our veye_raspivid, I think it is feasible to do some porting work.
But our software engineers are very busy now, so it will take some time to arrange this.
Our solutions are 953 and 954 and the source code of the driver is provided. You can refer to this source code to support 964.
Now fpdlink products have been suspended due to chip out of stock, sorry.