Hey, maybe you'll help further.
Any way I try mpv, I get Error when calling vdp_device_create_x11: 25.
Noticed that I don't have /dev/cedar_dev despite CONFIG_VIDEO_SUNXI_CEDAR=y in the kernel (included in armbian image, 3.4.113-sun7i).
I tried to create the device, sunxi_cedar_mod cedar_dev c243:0 in /lib/modules/modules.devname, and then I get Bus error with mpv.
What am I doing wrong?
libcedrus, libvdpau, libvdpau-sunxi built from sources, no errors.
EDIT: solved, sorry. Put sunxi_ve_mem_reserve in wrong place. Should be in boot.cmd.