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如果我想从网络摄像头录制视频。我使用以下命令：
mencoder tv:// -tv driver=v4l2:width=320:height=240:device=/dev/video0 -ovc lavc -o webcam.avi
但是，我想同时记录 2 个网络摄像头（/dev/video0和/dev/video1）。如何？
/dev/video0
/dev/video1
这是一个答案：
mencoder tv:// -tv driver=v4l2:width=320:height=240:device=/dev/video0 -ovc lavc -o webcam.avi & mencoder tv:// -tv driver=v4l2:width=320:height=240:device=/dev/video1 -ovc lavc -o webcam2.avi