开源的视频工具，里面包含ffmpeg，可以对音频文件进行切割等操作，有实现例子,Open source video tool, which contains ffmpeg, audio files can be cut and other operations, there are examples of implementation

网络视频在线播放，服务端能够控制客户端的播放，同时客户端能够选择播放-Network video online play, the server can control the playback of the client while the client can select the playback