Every time I try to airplay from my MBP to my AppleTv it is laggy as hell. Reminds me of dial up days.
The closer your laptop is to the router and the router to the ATV the better. Mine used to suck until I moved everything within 10 feet.
Now it works very very good. Only lags every once and a while. Also the mouse has a lot less latency now.
To make it even better I connected the atv wired through ethernet, that also helped a lot.
Check this out, if your router has QoS settings that helps a lot as well.
http://isource.com/2012/03/31/a-few-tips-for-improving-airplay-mirroring/
I'll give some of that stuff a try. Most of it I already do. If the device isn't mobile then I have it hard wired already. I don't have to worry about interference because I am the only SSID on the air waves here.
The devices are hard wired or the atv is?
I meant wire the atv, that will make it better than wiring the device air playing
It depends on whether the MP4 headers are located to the front of file (optimized). Eg in HandBrake, make sure the Web optimized checkbox is selected under Video settings.My Airplay depends on the video. Some seem to load up super fast, while others take much more time.