示例分为 CMOS 摄像头录像及回放两个功能：
1) 当用户进行录像时，会从 CMOS 摄像头采集视频， 在源代码 main.cpp 中，用 TVideo 类来实现这个部分的工作，在 TVideo 类中，会打开 CMOS 摄像头并采集图像。
2) 在从摄像头采集完图像后，需要在屏幕上进行预览，这部分的工作由 TFrameBuffer 类来完成。(Examples are divided into CMOS camera video and playback two functions:
1) When the user to record, will be collected from the CMOS camera video, in the source code main.cpp, with the TVideo class to achieve this part of the work, in the TVideo class, will open the CMOS camera and capture images.
2) After collecting the image from the camera, you need to preview the screen, this part of the work by the TFrameBuffer class to complete.)