我使用了一个消费级摄像机，它使用复合（标准）视频线将输出发送到视频捕捉卡。
I used a consumer-grade camcorder that sent its output to the video capture card using a composite (standard) video cable.
可以找到更贵的捕捉卡和不能在Linux上使用的卡。
You can find more expensive capture CARDS and CARDS that won't work at all with Linux.
这是 Hauppauge 最便宜的捕捉卡，它的性能和价格对于这个应用程序都是合适的。
This is the least expensive capture card from Hauppauge, and hits the sweet spot between price and performance for this application.
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