实现了手机录屏功能，将截屏下来的屏幕图片进行合并成视频，并保存至sd卡-A phone to record screen feature, the screenshots down to merge into a video screen image and save it to the sd card

该程序主要实现对音乐与视频进行合并后输出带音乐的视频，且用java进行实现！(the program mainly realizes the combination of music and video output music video, and use java to achieve!)