音乐播放器，程序运行时，先根据弹出对话框的提示值修改主程序开始处的摄像头图像高和宽。重新编译后运行程序即可。如果如果弹出对话框的提示值与程序中默认的设置值相同，则不用修改。-Music player, the program runs, the first pop-up dialog box prompts according to amend the main program at the beginning of the value of the camera image height an