将纯H264码流合成MKV文件。另外可以包括PCM的音频和ASS的字幕，参照官方V2结构实现。-Pure synthetic H264 stream MKV files. In addition, may include a PCM audio and ASS of subtitles, with reference to the Official V2 structure to achieve.

ffmpeg通过dshow驱动摄像头拍摄视频，并将视频转为h264格式，再添加到rtp流中。运行后生成*.sdp文件，拖入vlc播放器可以查看。运行时请将lib与include文件放到c盘下。本机环境为win8.1（x64） vs2013（x86）-ffmpeg dshow driven by the camera to shoot video, and video into h264 format, add it rtp stream. After running the generated*