From what I've seen and read, there is no Channels app on Roku and, apparently, one reason why is because a Roku does not have enough CPU power to handle those videos. I know I can watch Channels videos on Apple TV with the Channels app or with other apps. (Currently I'm using UMS as a media server and 8Player Pro as a viewer on Apple TV. This solution lets me watch the videos and use Autoplay as well - something the Channels app does not have.)
I added Roku's own app for viewing local videos. It let me access my Channels videos through UMS. It also recognized my HDHomeRun as a media server. I tested this with video from the HDHomeRun, as well as my Channels videos and videos from ripped DVDs. In all cases, the audio was intermittent. It'd continually cut in and out, roughly once each second.
Is there any combination of software I can use to view a stream from HDHomeRun or to see my videos from Channels on Roku? Or is it just an issue with Roku not recognizing the needed codecs or not having the computing power?
Considering that the high end Roku is 1/3 the price of a low end Apple TV, and that I'm going to be working with 4 TVs (2 in my house, 2 in the guest house), It'd be nice if I didn't have to shell out for an Apple TV for each TV so I could watch a live stream from the HDHomeRun or recorded videos from Channels.