帮实验室做的一个向蓝牙从机模块接收数据的应用，带有倒计时功能。-Help a laboratory to the Bluetooth slave module receives data, with the countdown function.

基于ffmpeg的rtmp播放器，这个是一个demo，实验室同学一起完成的一个小项目，功能还未彻底完善-Based on ffmpeg of rtmp player, this is a demo, students complete a small project together with laboratory function has not been completely perfect