一个为视频添加水印的DMO组件，可以做为学习DMO的开发和水印叠加的例子。-adding a watermark to the video components of the DMO, the DMO can be used as learning and the development of Watermark superposition example.

DMGWriter使用同步Reader取一个WMV文件，去掉文件头，把Sample写成一个文件output.dmg DMGDecoder读取output.dmg，使用WMVideo Decoder DMO解码各个Sample然后输出YUV-Reader from the use of synchronous DMGWriter a WMV file, remove the paper first, the Sample written output.dmg DMGDecoder to rea