I've done several searches for this, but have been unable to find anything addressing my specific problem. I've been working on backing up my my DVD and Blu-Ray collection to my PC, and have been converting all videos to AppleTV-compatible .mp4 format, using WinX HD Video Converter. To date, I have have zero issues with playing back standard definition videos in iTunes or streaming to AppleTV, however HD titles are a different story. The HD videos play back just fine in iTunes, but when I stream them through the ATV, at some point in the playback the soundtrack will stutter and cut-out completely. When this happens, I have to hit the Menu button to back out of the video, then resume playback; sound works fine when I resume from last point. I usually have to do this once or twice per episode when watching TV shows, and 4-5 times for movies. I have tried restarting the ATV, and I have also taken the ATV and my PC off the wi-fi, so the stream is travelling though CAT5e the whole way. Any help to nail down this issue would be appreciated. Thanks in advance.