Originally Posted by jusst
UPDATE: I recognized that I need to request the feature first. Doing this, the player runs, but no deinterlacing seems to be done. Seems like the feature is not yet implemented.
De-interlacing is already supported and should work. However, for anything other than bob/weave, you'll need to supply more fields than the current frame to the video_mixer_render function to provide the necessary history that the algorithms require (see vdpau.h for details). This is not implemented in the current MPlayer patches.
However, you should be able to enable bob and see a difference.