Yocto OS sources for Asus Tinker board
- VPU - Hardware accelerated decoding & encoding
- Gstreamer support for VPU
- Mali Kernel & user space libraries (OpenCL is the best)
- WiFi
- Video processing libraries (FFMPEG, OpenCV etc.,)
- Nodejs Webserver
You will have to edit build/conf/local.conf to enable/disable the modules you prefer.
Rockchip's yocto instructions are here http://rockchip.wikidot.com/yocto-user-guide and have been hugely helpful. Rockchip linux group - https://github.com/rockchip-linux