¿Cómo cambiar la cámara web predeterminada? Cambiar dfaults en Multimedia selctor no funciona

Tengo Logitech c920 configurado. Con la ayuda de un usuario experimentado de AskUbuntu, instalé GUVCview, el panel de control de Video4 linux y el probador de utilidades QT V4L2 aquí. Puedo cambiar de la cámara web incorporada de mi Toshiba a mi cámara externa usando GUVCview.

Sin embargo, cuando comienzo un videochat en Hangouts de Google, selecciona automáticamente la cámara de mi computadora portátil incorporada de manera predeterminada. Me gustaría cambiar mi configuración predeterminada para usar siempre una cámara externa, pero no puedo encontrar dónde está esta opción. Estoy ejecutando Windows 7 y Ubuntu 12.04 LTS en Toshiba Satellite L755

memoria: 3.8 Gib

procesador: CPU Intel® Core ™ i5-2410M @ 2.30GHz × 4

gráficos: Intel® Sandybridge Mobile

Tipo OS de 64 bits

disco: 40,2 GB

EDITAR: Intenté Gstreamer-propertiesen la terminal y cambié la entrada predeterminada en video a la cámara externa Logitech. Aún sin suerte. Cuando "pruebo" no obtengo ninguna imagen, y sigo teniendo la cámara del portátil cuando abro GUVC.

2nd EDIT: después de instalar el selector de medios múltiples en la terminal, todavía no pude encontrarlo en Dash. Aquí está la lectura después de ejecutar el comando:

Reading package lists... Done
Building dependency tree       
Reading state information... Done
gconf-service is already the newest version.
gconf-service set to manually installed.
gconf2 is already the newest version.
gconf2 set to manually installed.
libatk1.0-0 is already the newest version.
libatk1.0-0 set to manually installed.
libgconf-2-4 is already the newest version.
libgconf-2-4 set to manually installed.
libgnome-media-profiles-3.0-0 is already the newest version.
libgnome-media-profiles-3.0-0 set to manually installed.
libgstreamer0.10-0 is already the newest version.
libgstreamer0.10-0 set to manually installed.
dpkg is already the newest version.
gnome-media is already the newest version.
gstreamer0.10-gconf is already the newest version.
gstreamer0.10-gconf set to manually installed.
gstreamer0.10-plugins-base is already the newest version.
gstreamer0.10-plugins-base set to manually installed.
gstreamer0.10-plugins-good is already the newest version.
gstreamer0.10-plugins-good set to manually installed.
libc6 is already the newest version.
libglib2.0-0 is already the newest version.
libgstreamer-plugins-base0.10-0 is already the newest version.
libgstreamer-plugins-base0.10-0 set to manually installed.
libgtk-3-0 is already the newest version.
libgtk-3-0 set to manually installed.
x11-utils is already the newest version.
x11-utils set to manually installed.
The following packages were automatically installed and are no longer required:
  gir1.2-ubuntuoneui-3.0 linux-headers-3.2.0-54 libubuntuoneui-3.0-1
  thunderbird-globalmenu linux-headers-3.2.0-54-generic
Use 'apt-get autoremove' to remove them.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

Si corro Gstreamer-propertiesen la terminal obtengo el selector multimedia. Cambio la entrada predeterminada a externa, la luz azul en la cámara externa se ilumina (cuando presiono "probar"), pero no aparece ninguna imagen. Aquí hay una captura de pantalla de ajustes

3rd EDIT: después de ejecutarlo como root con la sudo gstreamer-propertiesentrada predeterminada que cambié a cámara web HD (la misma configuración que la captura de pantalla anterior) y aún cuando abro GUVC, se abre como una cámara portátil. Aquí está la lectura después de ejecutar SUDO

(gstreamer-properties:15236): Gtk-WARNING **: Unknown property: GtkDialog.has-separator

(gstreamer-properties:15236): Gtk-WARNING **: Unknown property: GtkDialog.has-separator
gstreamer-properties-Message: Skipping unavailable plugin 'artsdsink'
gstreamer-properties-Message: Skipping unavailable plugin 'esdsink'
gstreamer-properties-Message: Skipping unavailable plugin 'sunaudiosink'
gstreamer-properties-Message: Skipping unavailable plugin 'glimagesink'
gstreamer-properties-Message: Skipping unavailable plugin 'sdlvideosink'
gstreamer-properties-Message: Skipping unavailable plugin 'v4lmjpegsrc'
gstreamer-properties-Message: Skipping unavailable plugin 'qcamsrc'
gstreamer-properties-Message: Skipping unavailable plugin 'v4lsrc'
gstreamer-properties-Message: Skipping unavailable plugin 'esdmon'
gstreamer-properties-Message: Skipping unavailable plugin 'sunaudiosrc'

Cuando intenté cerrar la Terminal, decía que el proceso todavía estaba en uso.

4ta EDICIÓN, al día siguiente:

Seguí el enlace de abajo a Dumindu's

sudo apt-get install gstreamer-dbus-media-service gstreamer-tools gstreamer0.10-alsa gstreamer0.10-buzztard gstreamer0.10-buzztard-doc gstreamer0.10-crystalhd gstreamer0.10-doc gstreamer0.10-ffmpeg gstreamer0.10-ffmpeg-dbg gstreamer0.10-fluendo-mp3 gstreamer0.10-gconf gstreamer0.10-gnomevfs gstreamer0.10-gnonlin gstreamer0.10-gnonlin-dbg gstreamer0.10-gnonlin-doc gstreamer0.10-hplugins gstreamer0.10-nice gstreamer0.10-packagekit gstreamer0.10-plugins-bad gstreamer0.10-plugins-bad-doc gstreamer0.10-plugins-bad-multiverse gstreamer0.10-plugins-base gstreamer0.10-plugins-base-apps gstreamer0.10-plugins-base-dbg gstreamer0.10-plugins-base-doc gstreamer0.10-plugins-cutter gstreamer0.10-plugins-good gstreamer0.10-plugins-good-doc gstreamer0.10-plugins-ugly gstreamer0.10-plugins-ugly-doc gstreamer0.10-pocketsphinx gstreamer0.10-pulseaudio gstreamer0.10-qapt gstreamer0.10-sdl gstreamer0.10-tools gstreamer0.10-vaapi gstreamer0.10-vaapi-doc gstreamer0.10-x

y corrió eso a través de la terminal. Después de unos minutos, el guión se realizó y no noté ningún error o falla (pondré una copia a continuación). Sin embargo, cuando ejecuté sudo gstreamer-properties, recibí los mismos mensajes de "Saltar el complemento no disponible" que el anterior ^. La entrada predeterminada en el selector de sistemas multimedia está configurada en c920 HD cam, pero acabo de abrir GUVC y abre la cámara del portátil. Aquí está la lectura después de sudo apt get install... DEMASIADOS PERSONAJES, no se pudo publicar. Aquí está la mitad:

ad-multiverse_0.10.21-1_amd64.deb) ...
Selecting previously unselected package gstreamer0.10-plugins-good-doc.
Unpacking gstreamer0.10-plugins-good-doc (from .../gstreamer0.10-plugins-good-doc_0.10.31-1ubuntu1.2_all.deb) ...
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Solo quería verificar en el Centro de software de Ubuntu para asegurarme de que Gstreamer estaba instalado, y muestra todo lo instalado

mike@Mike-Ubuntu12:~$ lsusb
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 003: ID 04f2:b289 Chicony Electronics Co., Ltd 
Bus 002 Device 003: ID 046d:082d Logitech, Inc. 
mike@Mike-Ubuntu12:~$ lsusb -t
/:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/2p, 480M
    |__ Port 1: Dev 2, If 0, Class=hub, Driver=hub/6p, 480M
        |__ Port 2: Dev 3, If 0, Class='bInterfaceClass 0x0e not yet handled', Driver=uvcvideo, 480M
        |__ Port 2: Dev 3, If 1, Class='bInterfaceClass 0x0e not yet handled', Driver=uvcvideo, 480M
        |__ Port 2: Dev 3, If 2, Class=audio, Driver=snd-usb-audio, 480M
        |__ Port 2: Dev 3, If 3, Class=audio, Driver=snd-usb-audio, 480M
/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/2p, 480M
    |__ Port 1: Dev 2, If 0, Class=hub, Driver=hub/6p, 480M
        |__ Port 4: Dev 3, If 0, Class='bInterfaceClass 0x0e not yet handled', Driver=uvcvideo, 480M
        |__ Port 4: Dev 3, If 1, Class='bInterfaceClass 0x0e not yet handled', Driver=uvcvideo, 480M

Según la respuesta de @hopeithelps, parece que los programas toman / dev / video0 como la cámara web predeterminada. En mi sistema, / dev / video0 es inicialmente la cámara integrada, mientras que / dev / video1 aparece / desaparece automáticamente cuando se conecta / desconecta la cámara web externa.

Así que acabo de escribir un comando simple para configurar / dev / video0 para que apunte a la "mejor cámara disponible": la cámara web si está presente y la cámara integrada de lo contrario. En este momento tengo que invocar este script manualmente después de conectar / desconectar la cámara web. Sin embargo, el micrófono cambia automáticamente al "mejor micrófono" porque seguí esta respuesta de askUbuntu .

Rant: ¿No debería Ubuntu tener un enfoque unificado para conectar en caliente la pantalla, la cámara, el altavoz, el micrófono (y también el teclado, el mouse, el MIDI, ...?). Todas estas cosas parecen requerir retoques por separado. Creo que gnome-display-manager tiene el diseño ideal: recuerda mi configuración anterior cuando enchufo una pantalla que he usado antes.

Aquí está el guión:

#!/bin/bash
# Make default camera /dev/video0 point to the "best" camera present.

if [ -h /dev/video0 ]; then 
   sudo rm /dev/video0   # not first run: remove our old symlink
elif [ -e /dev/video0 ]; then
   sudo mv /dev/video0 /dev/video0.original   # first run: rename original video0
fi 
if [ -e /dev/video1 ]; then
   sudo ln -s /dev/video1 /dev/video0   # symlink to video1 since it exists
   echo "Set default camera /dev/video0 --> external camera /dev/video1"
elif [ -e /dev/video0.original ]; then  # symlink to video0.original otherwise
   sudo ln -s /dev/video0.original /dev/video0
   echo "Set default camera /dev/video0 --> integrated camera /dev/video0.original"
else
   echo "Sorry, does this machine have no camera devices?"
   ls -l /dev/video*
fi

Probado con guvcview y Google Hangouts, utilizando dos cámaras web diferentes de Logitech. Estoy ejecutando Ubuntu 13.10 (en realidad Mint Petra) en un Thinkpad T530i.

Puede que tenga que editar el script si su cámara web aparece como / dev / video3 o algo así, como lo hace para @hopeithelps. (Quizás debería haberlo hecho elegir el dispositivo / dev / video * que tiene la marca de tiempo más reciente ...)

No sé si es la mejor manera, pero con la misma cámara web y el mismo problema que encontré, usar el comando sudo rm /dev/video0elimina mi cámara web. Se ha ido hasta que se reinicie. Puede que tenga que cd /devhacerlo y asegúrese de que su cámara web sea video0mi c920 video3.

Primero debe instalar la aplicación Selector de sistemas multimedia

sudo apt-get install gnome-media dpkg gconf-service gconf2 gstreamer0.10-gconf gstreamer0.10-plugins-base gstreamer0.10-plugins-good libatk1.0-0 libc6 libgconf-2-4 libglib2.0-0 libgnome-media-profiles-3.0-0 libgstreamer-plugins-base0.10-0 libgstreamer0.10-0 libgtk-3-0 x11-utils

Luego ábralo y en su Videosección, puede cambiar la cámara web predeterminada.

** Esta aplicación se puede abrir con Terminal ejecutando:

sudo gstreamer-properties

Bueno, este tipo de cayó muerto en el agua. No sé si debería publicar otro hilo o qué. Simplemente estoy tratando de hacer que mi cámara web externa sea mi cámara web predeterminada. Tengo instalado Gstreamer (en la imagen) Tengo instalado el selector de sistemas multimedia. Tengo la configuración predeterminada en el selector de sistemas multimedia para configurar en Webcam c920 y, sin embargo, cuando abro el chat de video o GUVC, abre la cámara del portátil. Obtuve algo de ayuda en esto, y lo seguí. Pero todavía parece que no puedo hacer que funcione. ¿Alguien tiene alguna idea, o debería publicar en otro lugar? Gracias

Creo que tengo una solución. No sé si puede hacer que la cámara de su computadora portátil vuelva a funcionar, pero al menos pude hacer un USB por defecto.

Lo hice así:

1. sudo rm /dev/video0
   Después de esto, no pude iniciar Camorama Webcam Viewer en absoluto.
2. sudo chmod -R 777 /dev
   Esto le da permiso para cambiar los nombres de los archivos.
3. mv /dev/video1 /dev/video0
   Esto cambia el nombre de tu cámara usb a dev0

Después de eso, pude ver mi cámara USB automáticamente cuando abrí Camorama Webcam Viewer. Espero que esto ayude.