我如何分辨这些视频设备中哪一个是网络摄像头?

我如何分辨这些视频设备中哪一个是网络摄像头?
$ ls -ltrh /dev/video*
crw-rw----+ 1 root video 81, 1 Mai  4 00:17 /dev/video1
crw-rw----+ 1 root video 81, 0 Mai  4 00:17 /dev/video0

这是一台笔记本电脑,所以我猜一个是内置摄像头,一个是屏幕。但我该如何检查哪个?有没有办法获取有关其中一个的更多信息?

答案1

你可以做这个v4l2-ctl在终端中:

  1. 打开终端(如果尚未打开)
  2. 安装实用程序(如果尚未安装)
    sudo apt update 
    sudo apt install v4l2-ctl
    
  3. 运行实用程序:
    v4l2-ctl --list-devices
    
    您将看到如下输出:
    Integrated Camera (usb-0000:00:3b.0-1.2):
        /dev/video0
    

您看到的其中一个视频设备/dev/video*是虚拟设备。

答案2

有一个名为的包,usbutils它可以成为一种非常有价值的工具:

sudo apt install usbutils

然后您可以查询任何 USB 设备并获取大量信息:

$ sudo lsusb -v | grep -i webcam -a14

Bus 001 Device 009: ID 1bcf:2b8c Sunplus Innovation Technology Inc. 
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass          239 Miscellaneous Device
  bDeviceSubClass         2 ?
  bDeviceProtocol         1 Interface Association
  bMaxPacketSize0        64
  idVendor           0x1bcf Sunplus Innovation Technology Inc.
  idProduct          0x2b8c 
  bcdDevice           47.14
  iManufacturer           1 SunplusIT Inc
  iProduct                2 Integrated_Webcam_HD
  iSerial                 0 
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength          767
    bNumInterfaces          2
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0x80
      (Bus Powered)
    MaxPower              500mA
    Interface Association:
      bLength                 8
      bDescriptorType        11
      bFirstInterface         0
      bInterfaceCount         2
      bFunctionClass         14 Video
      bFunctionSubClass       3 Video Interface Collection
      bFunctionProtocol       0 
      iFunction               4 Integrated Webcam
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass        14 Video
      bInterfaceSubClass      1 Video Control
      bInterfaceProtocol      0 
      iInterface              4 Integrated Webcam
      VideoControl Interface Descriptor:
        bLength                13
        bDescriptorType        36
        bDescriptorSubtype      1 (HEADER)
        bcdUVC               1.00
        wTotalLength          109
        dwClockFrequency       48.000000MHz
        bInCollection           1
        baInterfaceNr( 0)       1
      VideoControl Interface Descriptor:
        bLength                18
        bDescriptorType        36
        bDescriptorSubtype      2 (INPUT_TERMINAL)
        bTerminalID             1

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