Simple bare bones DLL to enumerate video capture devices, and capture into a buffer on a seperate thread. A program can link to this DLL, begin video capture, and pull from the 30 frames / second buffer at any frequency and get full RGB frames to the

Detect limits of the frames from video.

从avi格式的视频中提取bmp格式的关键帧，以达到压缩空间的效果。-Avi video format from bmp format to extract the key frames to achieve the effect of compressed space.

从视频序列中抽取你想要的帧，保存为BMP格式的灰度图片-Extracted from a video sequence of frames you want, save as grayscale BMP image format