The first support in Microsoft Windows for video capture was provided through Video for Windows (VfW) for Windows 3.1. VfW was pretty good for its time, but it had certain limitations. Chief among these was the fact that the Video Compression Manager (VCM) was not designed to handle codecs that put video frames into a different order during the compression process. This meant that it would be difficult to write VCM-based MPEG codecs.

Figure 3 Capturing Live Video from Web Cam
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