delphi 用vfw进行捕捉生成视频使用的是AVICap窗口类来开发视频捕获程序。AVICap类支持实时视频流捕获和单帧捕获，并提供对视频源的控制。通常使用的MCI控件虽然也提供了数字视频服务。并为视频叠加提供了Overlay命令集等。注：使用时，需要修改文件扩展名。-generated delphi vfw capture video using the video capture program to develop AVICap window class. AVICap class support real-time video streaming capture and frame capture, and provides control of video sources. Although generally used MCI control also provides a digital video service. Overlay command set and video overlay. Note: When using the need to modify the file extension.