I too am disappointed with the slow channel changing in Emby. I have tried HDHomerun, VU+ over the network and the Hauppage tuners connected directly to the host server with no improvement in the Internal player channel change speed.
When I switch to VLC as an external player it is almost instantaneous. Not the most elegant solution as the Internal play offers full functionality while in play mode.
I have tried both Android (NV Shield & fTV) and AppleTV clients to test speed of loading new channels and both are slow.
Edited by beaglenz, 30 June 2018 - 08:41 PM.