I'm having trouble sharing movies via iTunes through home sharing. Everything I have is Mac, a 2008 iMac, Airport Extreme, (2) Apple TV 2's, and a Macbook Pro. Everything was fine with this entire setup with all of the movies I've ripped (using the Apple TV 2 settings in Handbrake) until Lion came out. Suddenly I got the 'Content cannot be displayed. Try again later' error message. After much searching, I found that disabling IPv6 was a good solution, temporarily, that is until Apple released iOS 5. I updated the ATV2's, iPhone, and iPad, and iMac with everything that came out during the update, and the issue came back.
I've tried everything I can think of, changing router channels, disabling IPv6 everywhere I saw it, wireless, hardwired, reloading the library, disabling the firewall, countless restarts of all my equipement etc. All of these movies worked perfectly before the updates, and suddenly I cant stream anything through my local MAC network.
Has anyone else seen this? Has anyone found any solutions for this problem? I could really use the help, Apple support is... limited.
Problem solved for me! After trying every possible setting on my equipment, including changing firmware revs on my router, rebuilding my library, re-encoding certain movies, changing all my iTunes, Network, Security, Sharing, and WiFi settings, I finally figured it out.
It looks to be a bug with the new iOS release V4.4 - Assuming you have your movies encoded in 5.1AC3 surround, you have to go into the Audio & Video settings on your ATV2, go down to Dolby Digital, and change the setting from Auto to On. For me at least, it was simple as that. I've tried all the same movies I was trying to play before, only then I was getting 'An error occurred loading this content.' After changing the setting from Auto to On, every single movie began working again, in full surround sound. To test it, I switched the setting back to Auto and the same problem came back. I'm sure Apple will have a fix for this later, but for now, we can assume 'Auto' means 'You cant stream your movies.'
I hope this helps!