使用DSP达芬奇双核芯片处理视频画面捕获时，一般有标清和高清两种数据源，高清视频数据一般采用Component输入采集720P视频画面。720P采集时需要调用到DMAI接口来处理，本程序是在调用DMAI接口和V4L2接口来处理720P视频的采集部分源代码。-DSP DaVinci dual-core chip processing video screen capture, there are generally two types of data sources in SD and HD, high-definition video data is commonly used the Component input capture 720P video screen. DMAI interface 720P acquisition need to call to deal with, the procedure was to call the DMAI interfaces and V4L2 interface to handle 720P video capture part of the source code.