I gave it a shot and it's going back to Amazon. While mikec27's situation is a bit different than mine, my research is as follows. Splitter and downscaling work in some capacity, but it does not maintain the proper color pallet when downscaling 4K Dolby Vision to If you are looking for that capability, look elsewhere. Last summer I had a lightning strike in the back yard. While I had no other damage in the house besides my sprinkler controller, the raspberry PI pin used to send the signal to the LED strip was somehow damaged.
Basically, it sends one byte out a pin used to drive the LED signal and tries to read it via another pin. Yeah, that example is pretty simplistic in that it doesn't really process a "real" image or video stream. I'd have no idea on how to handle the dewarping math and would have to rely on a library such as opencv. This StackOverflow post seems to delve into some of this and issues with dewarping a true fisheye into a usable image.
This was fun to look into but I'm running out of motivation due to many potential roadblocks. Digging a bit more, I ran into GStreamer which seems to have some promise. It does look like it exposes a dewarp function based on opencv. I've run out of patience for today, and remain unconvinced I'll spend more time digging into this.
Those install instructions didn't work for me, and I gave up. The raspivid command looks like it's piping video through gst-launch That gst-launch smells like it has a way to construct a pipeline Flovie, I was talking to a coworker about a similar concept on the way back from a tech conference this past Friday. Since I'm not familiar with the "proto" approach, I'd think I'm going to explore this V4L2 virtual camera in combination concept with the OpenCV fisheye undistort.
I'm completely unsure of the performance impacts to the video stream. I'll play a bit with it, but I haven't purchased a true fisheye lens camera yet. So when the dual AVR is using a 4k signal say xbox or ps4, and the 2nd hdmi is going into the hdmi2av device in order to get to the grabber, those 2 devices wont be able to process the 4k signal so no ambilight? No 4K signal for either output. However, my TV can display the 2K signal just fine. And the grabber works just fine.
