After quite a lot of unsuccessful attempts, I have finally got working configuration for Buildroot that allows to stream image from FA-CAM500B camera connected to NanoPi A64. That should allow low latency image processing. The configuration is available at alt.sources group. Subject of the post is "Buildroot configuration for NanoPi A64 with FA-CAM500B camera". Direct link to the post isPlease note, that this is a shar archive, so you need to display the original message, and use unshar to unpack it.
With best regards, Wojtek