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PC机本身处理视频已经有了标准设备:VGA显示卡和显示器。借助Microsoft公司推出的Video for Windows软件包可以完成视频播放、编辑等功能。上一讲讨论过的电影卡其实也是处理视频的设备,不过它只能播放出按MPEG标准录制的节目,最新的电影卡也能捕捉播放过程中出现的画面,但它不能把我们所见到的实物录制下来。如果要求摄取自己的视频节目,则需要视频捕捉卡(Video Capture Card)。最简单的视频捕捉卡只能捕捉单帧,而现在常见的视频捕捉卡能够捕捉连续帧,并以AVI文件格式保存到硬盘上。较好质量的视频捕捉卡具有硬件压缩功能,如果
The PC itself already has standard equipment for processing video: a VGA video card and a monitor. With the help of Microsoft’s Video for Windows software package to complete the video playback, editing and other functions. The movie card discussed in the previous talk is actually a video-processing device, but it can only play programs recorded according to the MPEG standard. The latest movie card can also capture the picture that appears during playback, but it can not put what we see Recorded in kind. If you want to ingest your own video program, you need a Video Capture Card. The simplest video capture card can only capture a single frame, and now common video capture card to capture a continuous frame, and AVI file format saved to the hard disk. Better quality video capture card with hardware compression if