#Loopback device how to
#Loopback device driver

If you want to make it work with motion, use motion-3.2.6 or above.

vloopback-1.0.tar.gz : old stable version with some more fixes and allow build a kernel module in debian way and fixes problems to compile in Suse.

vloopback-1.1.tar.gz : New stable version tested with stable version 2.6.24.

vloopback-1.2.tar.gz : New stable version tested with stable version 2.6.28.

vloopback-1.3.tar.gz : New stable version tested with stable version 2.6.31.

However, opening multiple instances of camsource doesn't cause a problem.Īttached are the recent versions of the vloopback. You should also not open two 'view's in the same instance of camstream. You can't use camorama with vloopback, as far as I know, camorama looks for inputs from /dev/video0. Now, you can watch your webcam with camstream at 640x480 (choose the device called vloopback0 output in camstream's menu, which is /dev/video2), at the sime time you can record a video of your webcam stream at 320x240 by doing 'ffmpeg -vd /dev/video4 -s 320x240 picture.mpeg', you can at the same time run a webcam http server by running 'camsource' (after editting nf to choose /dev/video2 or /dev/video4 as v4l_input source). (Assuming that you have only one real video device at /dev/video0. Yes, it is, you can edit the source of invert.c (it suffices to remove one sign) to write a program that simply sends the stream from /dev/video0 to /dev/video1 if you prefer.Ģ) A more complicated example (applications using different resolutions) Do 'modprobe vloopback pipes=2'. Of course, you may think resizing the scale from 320x240 to the same size is silly. Now, you can run as many webcam applications as you want with input as /dev/video2 (however you might have to tell your application the picture size, see below).

#Loopback device how to

How to use multiple webcam applications with vloopbackġ) A simple example (all applications use the same resolution) Do 'modproble vloopback' then 'resize /dev/video0 /dev/video1 320x240 320x240'.

Motion (feeding a second motion process the output of the first gives neat effects).

EffecTV An amazing real-time video effector.

'xawtv -c /dev/videoN -geometry 176x144'.

Xawtv also works, but you might have to tell it the size e.g.

setv4l (Jeroen's program for changing the settings of a video device).

These applications that can read the output of vloopback:

The IEEE1394 IIDC camera GUI 'Coriander'.

The example program dc1394_vloopback of libdc1394.

#Loopback device driver

invert (an example in the vloopback driver package itself).The following applications supports piping a video feed to vloopback:

Instead join the motion mailing list where there is a reasonable chance to find help. If you need support do not ask the current motion maintainers. But since there is still some demand for it and still some people that make small patches for it the new Motion maintainers decided to gather these patches in a new release. The video4linux device is no longer actively being maintained. Note also that vloopback output can be used by several applications at the same time (see below) You can use this driver for looking at motion in realtime or for feeding a webcam while still securing your room. Jeroen Vreeken wrote this driver for debugging motion realtime, which worked very nice and he decided to make something usefull of it. The video4linux device is a driver that implements a video pipe using two video4linux devices Uploaded to TWiki first time by KennethLavrsen

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