如何更改默认摄像头？更改多媒体选择器中的dfaults不起作用

我已经设置了Logitech c920。在有经验的AskUbuntu用户的帮助下，我在这里安装了GUVCview，Video4 linux控制面板和QT V4L2实用程序测试器。我可以使用GUVCview将东芝的内置摄像头更改为外部摄像头。

但是，当我在Google环聊上发起视频聊天时，它会自动选择我的内置笔记本电脑摄像头作为默认摄像头。我想更改默认设置以始终使用外接摄像机，但找不到此选项的位置。我在东芝Satellite L755上运行Windows 7和Ubuntu 12.04 LTS

内存：3.8千兆

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

图形：英特尔®Sandybridge Mobile

操作系统类型64位

磁盘：40.2 GB

编辑：我Gstreamer-properties在终端中尝试过，并将视频下的默认输入更改为Logitech外部凸轮。仍然没有运气。当我“测试”时，我什么也没有，打开GUVC时仍然得到笔记本电脑的摄像头。

第2编辑：在终端中安装了多媒体选择器后，我仍然无法在Dash中找到它。这是运行命令后的读数：

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.

如果Gstreamer-properties在终端中运行，我会得到多媒体选择器。我将默认输入更改为外部，外部凸轮上的蓝灯点亮（当我按“测试”时），但是没有图像。这是设置的屏幕截图

第3次编辑：以root身份运行后，sudo gstreamer-properties我将默认输入更改为HD网络摄像头（与先前的屏幕截图相同的设置），并在打开GUVC时更改为Stil，它将作为笔记本电脑摄像头打开。这是运行SUDO后的读数

(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'

当我尝试关闭终端时，它说该程序仍在使用中。

第二天的第四次编辑：

我点击了以下链接到Dumindu的

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

并通过终端运行。几分钟后，脚本完成，我没有注意到任何故障或错误（我将在下面放置副本）。但是，当我随后运行时sudo gstreamer-properties，收到与上述相同的“ Skiping unavailable plugin”消息。多媒体系统选择器上的默认输入设置为c920 HD cam，但我刚刚打开了GUVC，它打开了笔记本电脑摄像头。这是sudo apt get install.... 之后的读数。字符太多，无法发布。这是一半：

ad-multiverse_0.10.21-1_amd64.deb) ...
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Unpacking gstreamer0.10-plugins-good-doc (from .../gstreamer0.10-plugins-good-doc_0.10.31-1ubuntu1.2_all.deb) ...
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Unpacking libpocketsphinx1 (from .../libpocketsphinx1_0.5.1+dfsg1-0ubuntu3_amd64.deb) ...
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只是想仔细检查Ubuntu软件中心以确保已安装Gstreamer，并且它显示了已安装的所有内容

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

根据@hopeithelps的回答，似乎程序将/ dev / video0用作默认网络摄像头。在我的系统上，/ dev / video0最初是集成摄像机，而在连接/分离外部网络摄像头时，/ dev / video1自动出现/消失。

因此，我只编写了一个简单的命令，将/ dev / video0设置为指向“最佳可用的摄像头”-如果存在，则为网络摄像头，否则为集成摄像头。目前，我必须在插入/拔下网络摄像头后手动调用此脚本。但是，麦克风会自动切换到“最佳麦克风”，因为我遵循了这个askUbuntu答案。

Rant：Ubuntu不应该采用统一的方法来热插拔显示器，摄像头，扬声器，麦克风（还有键盘，鼠标，MIDI等吗？）。所有这些事情似乎都需要单独修补。我认为gnome-display-manager具有理想的设计：当我插入以前使用的显示器时，它会记住我的旧设置。

这是脚本：

#!/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

使用两个不同的Logitech网络摄像头，通过guvcview和Google环聊进行了测试。我在Thinkpad T530i上运行Ubuntu 13.10（实际上是Mint Petra）。

如果您的网络摄像头显示为/ dev / video3之类的内容，则可能需要编辑脚本，就像@hopeithelps一样。（也许我应该让它选择具有最新时间戳的/ dev / video *设备...）

我不知道这是否是最好的方法，但是使用命令找到的相同网络摄像头和问题sudo rm /dev/video0会删除我的网络摄像头。它消失了，直到重新启动。您可能需要cd /dev确保您的网络摄像头是video0我的c920 video3。

首先，您需要安装应用程序“ 多媒体系统选择器”

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

然后打开它，然后在其Video部分中，您可以更改默认的网络摄像头。

**可以通过运行以下命令使用终端打开此应用程序：

sudo gstreamer-properties

好吧，这种倒在水中死了。我不知道该发布其他主题还是什么。我只是想将外部网络摄像头设为默认网络摄像头。我安装了Gstreamer（如图）我安装了多媒体系统选择器。我在“多媒体系统”选择器中有默认设置，可以在网络摄像头c920上进行设置，但是当我打开视频聊天或GUVC时，它会打开笔记本电脑摄像头。在这方面，我得到了一些帮助，然后我继续进行。但是我似乎仍然无法正常工作。有没有人有任何想法，还是应该在其他地方发布？谢谢

我想我有解决办法。我不知道您是否可以让笔记本电脑的相机重新工作，但是至少我能够将USB作为默认设置。

我这样做是这样的：

1. sudo rm /dev/video0
   此后，我根本无法启动Camorama Webcam Viewer。
2. sudo chmod -R 777 /dev
   这使您可以更改文件名
3. mv /dev/video1 /dev/video0
   这会将您的USB相机重命名为dev0

之后，当我打开Camorama Webcam Viewer时，我能够自动看到我的USB摄像机。我希望这有帮助。