imagenation PXC200 sp采集卡自带的c代码并不能实现4路输入视屏的自动选择，本代码能实现4路的自动选择。希望对大家又帮助-imagenation PXC200 sp capture card comes with c code and can not be achieved four input Shiping automatic selection, this code is to achieve 4-way automatic choice. We also want to