hello dear friends,
I m having an issue which it made me desperate and looking for some help 
i appriciate if someone share some thoughts and comments to sort it out.
I am triying to real time tracking with chroma keyed live feed in ue4. I use htc vive hand controller (not tracker) I use my live camera as Sony A7S2. I assembled my VR controller in the very closer on top of my camera. I matched camera motion with VR controller to The virtual camera and i can able to control virtual camera with Vive controller in UE4 envorienment.
But whenever i move my real world camera with VR then transparent live video feed has movement sync issue. However if i move my camera right, then live feed shift left and vice versa. Probably i watched any Youtube video abouth real time green screen tracking but i coulnd find any solution.
It is only occur live feed, not happen with constant feed such as mp4,mov…or ext file format footage.
Bythe way i delete chroma key colour with material instance method and feed it to a plane on the level.
How to sync ue virtual camera movement to match my real- world camera motion allowing the 3d backround envorienment to move appropriately with my actors ? Where am i missing ? or which setup should i establish ? Should i use composure method to composite feeds ?
Any Comments and thoughts i appriciated.
Thanks