Hi Adam - I am preparing my test stream and will provide it shortly. Did you figure out your 4k stream issue? Is your audio EAC3? I had similar problem with EAC3 and the only solution was to flip to AAC. Not sure what the problem is, Roku states EAC3 is supported, but maybe some encoders produce some weird blend of AC3 or there is a bug. Btw, did you use roVideo or SceneGraph?