本文介绍了从ruby中的网络摄像头抓取快照的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
如何从ruby的网络摄像头拍摄快照?我知道网络摄像头设备位于/dev/video0上，但是如何从中获取图片?
How can I take snapshots from a webcam in ruby? I know the webcam device is on /dev/video0, but how do I get a picture from it?
推荐答案
我是 Hornetseye的开发人员.您可以使用HornetsEye的V4L2接口捕获图像，如下所示.
I'm the developer of Hornetseye. You can capture images with the V4L2-interface of HornetsEye as follows.
require 'rubygems'
require 'hornetseye_v4l2'
require 'hornetseye_xorg'
require 'hornetseye_rmagick'
include Hornetseye
input = V4L2Input.new '/dev/video0'
img = X11Display.show { input.read }
img.to_ubytergb.save_ubytergb 'test.png'
当前支持的色彩空间是UYVY，YUYV，YUV420，GREY和RGB24.请注意，目前尚不支持其他色彩空间，例如MJPEG.
Currently supported colourspaces are UYVY, YUYV, YUV420, GREY, RGB24. Note that other colourspaces such as MJPEG are not supported at the moment.
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