I found these old thread from last year in the XDA Nexus 10 forum & old MX Player forum on Google Groups:
MXplayer to support full screen HDMI!!
Nexus 10 hdmi output scaling
Did this feature ever get implemented? I also have a device that doesn't have a 16:9 aspect ratio (LG Optimus G) & would LOVE to have this feature in MX Player so I can stop using the stock LG video player app when I have my device hooked up to my TV.
MXplayer to support full screen HDMI!!
Nexus 10 hdmi output scaling
Did this feature ever get implemented? I also have a device that doesn't have a 16:9 aspect ratio (LG Optimus G) & would LOVE to have this feature in MX Player so I can stop using the stock LG video player app when I have my device hooked up to my TV.