DirectShow视频拉伸Filter(Transform Filter)，目前只实现视频纵向2倍拉伸， 可用于视频采集卡按场采集图像时拉伸图像 本工程在WindowsXp Sp2、DirectX9、VC++6.0下编译通过-DirectShow Video tensile Filter (Transform Filter), currently only two times the vertical stretch to achieve video can be used for v