用opencv和c编写的读取视频的程序，带滚动条。-Read the video program written using opencv and c, with scroll bars.

在程序中需要处理大幅图片时候，本例实现利用滚动条浏览大幅图片的功能-In the program to deal with large picture, in this case, we can realize the function of using the scroll bar to browse for pictures sharply