Why Your Phone-to-TV Mirror Lags — and How to Fix It

You tap "cast," your phone screen appears on the TV — and then it stutters. The video freezes for a second, the audio drifts out of sync, and a game that felt smooth on your phone turns unplayable on the big screen. If you have ever mirrored your phone to a TV, you have met this problem. I build TV Cast, an Android app for casting a phone screen to a TV. Fixing lag was the biggest part of making…