PowerDVD 10 Ultra - DVD, Blu-Ray, MKV, FLV,.... mutlimedia player.

• Convert DVDs and videos into lifelike 3D experience
• Immerse in amazing depth and realism with Blu-ray 3D playback
  CPU/GPU acceleration for smooth playback.
• Lossless HD audio quality for maximum enjoyment
• Play broad range of video formats: MKV, FLV, 3GP, and more
• Make movies social: share bookmark reviews and live comments

I used autodetection for the 3D display of HP Envy 17 3D. Side-by-side as well as top-over-bottom .MKV 3D movies played just fine. Didn't have any problem playing 3D .MVC demo videos that come with the laptop as well.
Highly recommended!