After the new fire tv stick 4k released, we notice there are a couple of video issues related to the MTK8695 chipset. One of them is:
If we have surfaceview A, B. And B is on the top of A. If B calls setZOrderMediaOverlay(true), then A will show black screen.
This doesn't happen on other hardware decoders, like the Amlogic used on fire tv cube 4k.