1080 MKV resolution problem on iphone 6 plus

Hi,

when i watch a 1080P video from my iphone 6 plus on my TV via HDMI I chose in the app to size the video to 1080 it does it correctly but after a few minutes the picture size goes down and there are black bars surrounding the image… what is the problem?

Thanks
Oren

Hmm, what kind of videos?

Is this still happening in the latest 4.2 update?

I have the same problem and even with the latest version. After some minutes the image exit the fullscreen and don’t return back until I close and open the app again or disconnecting and reconnecting the adapter.