正解
chromecast 根本沒有 miracast 功能
想要有miracast 功能 的,還是乖乖去買電視棒, or 有此功能的 android 多媒體播放機,大陸不少

http://allaboutchromecast.com/chrom...reen-mirroring/

Is Chromecast using Miracast ?

First, Chromecast is NOT using Miracast. It actually has nothing to do with Miracast.

Chromecast can work in two modes: web apps mode and Chrome tab casting mode.