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Public bug reported:

$ lsmod | grep webcamstudio
webcamstudio           36864  3 
videodev              155648  8 webcamstudio,v4l2loopback,au0828,v4l2_common

$ ls -la /dev/video*
crw-rw----+ 1 root video 81, 0 Jun 15 06:24 /dev/video0
crw-rw----+ 1 root video 81, 1 Jun 15 06:24 /dev/video1
crw-rw----+ 1 root video 81, 2 Jun 15 06:48 /dev/video2

Use gstreamer to send sample video to /dev/video0
$ gst-launch-0.10 ximagesrc use-damage=0 ! ffmpegcolorspace ! "video/x-raw-yuv,format=(fourcc)YUY2" ! v4l2sink device=/dev/video0

$ sudo webcamstudio
"Detected Video Devices"
  WSVideoDevice (0x0000) (0)
"Output"
 "WebcamStudio Virtual Cam"
   "Pixel Format": RGB24
   "Dummy video device (0x0000) (2)" //from "$ sudo modprobe v4l2loopback" which was done second
   "WSVideoDevice (0x0001) (1)" //from "$ sudo modprobe webcamstudio devices=2" which was done first

Open Cheese
  "No device found"
Skype behaves the same way.
WebcamStudio not only finds the input device, but also lists both output devices that are of the modules "webcamstudio" and "v4l2loopback"

Let me know if there is a more appropriate package that this "bug"
should be submitted to.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: cheese 3.14.1-2ubuntu4
ProcVersionSignature: Ubuntu 3.19.0-20.20+test-generic 3.19.8
Uname: Linux 3.19.0-20-generic x86_64
ApportVersion: 2.17.2-0ubuntu1.1
Architecture: amd64
CurrentDesktop: Unity
Date: Mon Jun 15 06:59:00 2015
EcryptfsInUse: Yes
ExecutablePath: /usr/bin/cheese
InstallationDate: Installed on 2015-06-04 (11 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
ProcEnviron:
 PATH=(custom, no user)
 SHELL=/bin/bash
 LANG=en_US.UTF-8
 LANGUAGE=en_US
 XDG_RUNTIME_DIR=<set>
SourcePackage: cheese
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: cheese (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug third-party-packages vivid

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https://bugs.launchpad.net/bugs/1465264

Title:
  Cheese And Skype Do Not Find Virtual Camera

Status in cheese package in Ubuntu:
  New

Bug description:
  $ lsmod | grep webcamstudio
  webcamstudio           36864  3 
  videodev              155648  8 webcamstudio,v4l2loopback,au0828,v4l2_common

  $ ls -la /dev/video*
  crw-rw----+ 1 root video 81, 0 Jun 15 06:24 /dev/video0
  crw-rw----+ 1 root video 81, 1 Jun 15 06:24 /dev/video1
  crw-rw----+ 1 root video 81, 2 Jun 15 06:48 /dev/video2

  Use gstreamer to send sample video to /dev/video0
  $ gst-launch-0.10 ximagesrc use-damage=0 ! ffmpegcolorspace ! "video/x-raw-yuv,format=(fourcc)YUY2" ! v4l2sink device=/dev/video0

  $ sudo webcamstudio
  "Detected Video Devices"
    WSVideoDevice (0x0000) (0)
  "Output"
   "WebcamStudio Virtual Cam"
     "Pixel Format": RGB24
     "Dummy video device (0x0000) (2)" //from "$ sudo modprobe v4l2loopback" which was done second
     "WSVideoDevice (0x0001) (1)" //from "$ sudo modprobe webcamstudio devices=2" which was done first

  Open Cheese
    "No device found"
  Skype behaves the same way.
  WebcamStudio not only finds the input device, but also lists both output devices that are of the modules "webcamstudio" and "v4l2loopback"

  Let me know if there is a more appropriate package that this "bug"
  should be submitted to.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: cheese 3.14.1-2ubuntu4
  ProcVersionSignature: Ubuntu 3.19.0-20.20+test-generic 3.19.8
  Uname: Linux 3.19.0-20-generic x86_64
  ApportVersion: 2.17.2-0ubuntu1.1
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Mon Jun 15 06:59:00 2015
  EcryptfsInUse: Yes
  ExecutablePath: /usr/bin/cheese
  InstallationDate: Installed on 2015-06-04 (11 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
  ProcEnviron:
   PATH=(custom, no user)
   SHELL=/bin/bash
   LANG=en_US.UTF-8
   LANGUAGE=en_US
   XDG_RUNTIME_DIR=<set>
  SourcePackage: cheese
  UpgradeStatus: No upgrade log present (probably fresh install)

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