说明：   提供的代码是编写一个基于linux系统的网络视频点播应用程序，利用Qt工具编写图形界面和基于TCP协议的网络传输模块。Linux操作系统以其开源性、多用户多任务、支持多种硬件平台、可靠地安全稳定性能以及日趋完善的图形界面和丰富的网络功能等等，逐渐成为了各行业的首选操作系统，尤其是基于ARM内核的嵌入式linux更是得到了极为广泛的应用。 本系统分为服务器端和客户端两部分。服务器端提供多视频源，供用户进行选择，客户端提供人机交互界面，当用户需要点播某个视频时，首先在Ip Address栏输入服务器的Ip地址，然后选择movies栏的下拉框，从视频列表中选择相应的视频目录，接着点击play按钮，一段缓冲之后开始播放视频，这样就完成了点播功能。
(The code is written to provide a linux-based VOD system, applications, graphical user interface written using Qt tools and TCP-based network transmission module. Its open-source Linux operating system, multi-user multi-tasking, support multiple hardware platforms, reliable performance, and increasing security and stability improved graphical interface and a rich network functionality, etc., has become the operating system of choice for various industries, especially ARM core-based embedded linux is to get a very wide range of applications. The system is divided into server and client in two parts. Server to provide multiple video sources for users to choose, the client provides interactive interface, users need a video on demand, the first in the Ip Address field, enter the server s Ip address, then select the movies column drop-down box, from video list, select the appropriate video directory, then click the play button, a buffer after the video starts playing, thus completing t)