I see, I think currently no deinterlacing happens because VDP_VIDEO_MIXER_PICTURE_STRUCTURE_FRAME is set in vo_vdpau.c...
Will fiddle around a bit with it.
Actually what I am even more curious about right now is how far performance-improvements are to be expected?
All high bitrate H264-ts streams I have do run out of sync until mplayer spews messages telling me that the video-buffer is full...
You might grab a short sample here: http://www.jusst.de/files/sample.ts