动态视频汉字字符叠加器(VDM)可以广泛用于公路收费系统、银行柜员制、电视监控等工业控制场所，也可用于车站、码头、机场等场所的广告、宣传、信息提示,此源码实现视频的字符叠加。-Chinese characters superimposed (VDM) can be widely used in highway toll system, bank teller system, TV monitoring of industrial control and other places, can als