xbmc/xbmc — comment on commit 44a604675be7d2c6e87fa718c259315caefdb95b
File: xbmc/cores/VideoRenderers/RenderManager.cpp line 547
By FernetMenta:

Unintentionally I had set deinterlace mode to force and ended up with double deinterlacing. One done inside vdpau and the other one here. How about setting the DVP_FLAG_INTERLACED right after decoding on forced mode?