Is there any way to provide a dynamic mask? For instance, if I wanted to blur a dynamic portion of each fram, like a face or logo?

I've been trying to find higher-performance methods of doing this with live footage that don't require openCV. Seems like FFmpeg doesn't have a great way to do this or I just haven't found it yet?

I guess I'm also looking for frameworks or tools that can handle live video "manipulation" like rendering shapes or graphics. OpenCV is painfully slow for most of this stuff, everything else is seemingly completely proprietary. But nVidia seems to have some incredible tools baked into their latest stream manipulation API's.