tkCam

tcl/tk USB camera (a.k.a. webcam) app, with live view and recording capabilities

tkCam comes in two versions, using v4l2 or uvc protocols. Both are available under AndroWish (for Android) or undroidwish or vanillawish (for Linux, Windows, MacOS,...), a "batteries included" tcl/tk interpreter by Christian Werner.

Under regular tcl/tk wish interpreter, v4l2 is available as a separate library that can be installed from source, see https://androwish.org/home/file/undroid/v4l2/

uvc

tlcuvc library implementation of the uvc has only been tested under undroidwish/vanillawish. On Linux, a udev rule needs to be added allowing for detaching the kernel driver from the device. An example of /etc/udev/rules.d/99-libuvc.rules that accomplishes this is:

#libuvc: enable users in group "plugdev" to detach the uvcvideo kernel driver
ACTION=="add", SUBSYSTEM=="usb", ENV{ID_USB_INTERFACES}=="*:0e02??:*", GROUP="plugdev"

In addition, users must be in the plugdev group in order to be able to open the camera's USB connection.

v4l2

A straightforward installation: ./configure; make; sudo make install is all it takes after downloading the source. The easiest way is to download the .tar.gz for the whole project, but extract only the v4l2 subdirectory.