I've been picking up some low-price blu-ray discs and am using software to rip the movie title to a 1080p MP4 file. The MP4 plays perfect when played on my Nook HD+ tablet, on my Windows PC, and when streamed directly to my DNLA-ready Panasonic TV. However, when I try to play the same files on my iPhone 5, iPad 3 or stream to a TV using Apple TV and home sharing (basically any Apple device), the audio track leads the video by a bit. Enough to really be distracting and almost unwatchable. Even using non-Apple apps on my iPhone to play them has the same effect. What am I doing wrong? (I tried searching this forum but seems like search is disabled). Thanks.