webcams: added

wiki/linux/webcams.md

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+# Webcams
+
+Webcams are video cameras which are designed to be used with a computer for
+streaming, video calls or similar usages.
+This section lists and explains software for the handling of webcams under a
+Linux operating system.
+
+## Editing Video Stream
+
+The editing of a video stream provided by a webcam can be achieved by using
+[OBS](/wiki/obs.md) together with the
+[OBS Virtual Camera plugin](/wiki/obs.md#virtual-camera).
+
+## Configure the Webcam
+
+A webcam can be configured with [guvcview](https://guvcview.sourceforge.net/).
+This program provides a simple interface for capturing and viewing video from a
+[v4l2](./v4l2.md) device and is thus dependent on v4l2.
+Additionally guvcview provides an interface to configure various webcam settins
+and enable a few effects on top of it.