[a11599]

I just checked deinterlacing on Radeon HD 6570 and Catalyst 14.12 (Omega) and it worked just fine with both builds (mine and afedchin's vanilla). Debug log is same as yours. I used a local file (I do not use PVR). Judging by the image it looked as VA deinterlacing (definitely not like bob).

Would you please post screenshots from DXVA Checker Processor Device / Direct3D 11 Processor Caps and Rate Conversion Caps tabs?

These are mine:
http://postimg.org/image/t3dq6fhuh/
http://postimg.org/image/lyx5ejr9j/

Might hopefully provide some clues why deinterlacing is not working for you.