@rangarid
there are some errors in your How to, tried myself wit a debian based distro (lubuntu).
The problem is that you need a newer libvdpau and newer mplayer to make HEVC work.
maybe I post a corrected How-to later this evening.
I know that, i wrote that in the next post. But for H264 it works as in my tutorial. Ubuntu 15.04 has libvdpau 1.1 which supports h265, there the h265 changes are not needed. I had a 14.04 version, there it was necessary.
does libcedarx work on H3?
if so, I assume it would use less cpu resources.
I try to use mpv running with libvdpau-sunxi to play big_buck_bunny_1080p_H264_AAC_25fps_7200K, and it takes ~30% of each core.
it is bit high, isn't it?