• Jetson(ubuntu18.04)使用v4l2-ctl工具USB摄像头和CSI 摄像头的规格参数查看方法

    最简单的检测设备存在不

    ls /dev/video*

    你会看到列出了单个设备，但是这样的信息量太少，通常无法判断到底哪个编号是哪个摄像头。

    要更进一步检测摄像头数量与详细规格，就需要 v4l2-utils 这个工具协助，安装方法很简单，如下指令：

    sudo apt-geat install v4l-utlis

    安装完之后，可以用以下指令检测比较完整的信息：

    v4l2-ctl- --list-devices

    本例中执行这个命令后，会看到下面截屏信息，将USB个摄像头都列清楚：

    1. UVC Camera (046d:0825) (usb-70090000.xusb-2):
    2.         /dev/video0

    这台设备的csi摄像头有点问题，文件系统可能被我搞坏了没显示出来网上的图是下面的

    这里就能非常清楚看到第一个（/dev/video0）属于 imx219 规格（CSI）摄像头，第二个（dev/video2）是 USB2.0 的摄像头，接到 xusb-2（规格是 USB3）接口，第三个（/dev/video1)是 USB 摄像头，接到 xusb-3.2 (规格是 USB2）接口，这样就能一目了然知道哪个编号对应哪个摄像头。 

    接下来还可以用这个指令，进一步检测每个摄像头的更细致规格，包括所支持的图像种类、宽高、帧数等等，这些在后面使用代码时很重要。

    请执行以下指令，来看一下第一个USB 摄像头的规格参数：

    1. v4l2-ctl --device=/dev/video0 --list-formats-ext
    2. ioctl: VIDIOC_ENUM_FMT
    3.         Index       : 0
    4.         Type        : Video Capture
    5.         Pixel Format: 'YUYV'
    6.         Name        : YUYV 4:2:2
    7.                 Size: Discrete 640x480
    8.                         Interval: Discrete 0.033s (30.000 fps)
    9.                         Interval: Discrete 0.040s (25.000 fps)
    10.                         Interval: Discrete 0.050s (20.000 fps)
    11.                         Interval: Discrete 0.067s (15.000 fps)
    12.                         Interval: Discrete 0.100s (10.000 fps)
    13.                         Interval: Discrete 0.200s (5.000 fps)
    14.                 Size: Discrete 160x120
    15.                         Interval: Discrete 0.033s (30.000 fps)
    16.                         Interval: Discrete 0.040s (25.000 fps)
    17.                         Interval: Discrete 0.050s (20.000 fps)
    18.                         Interval: Discrete 0.067s (15.000 fps)
    19.                         Interval: Discrete 0.100s (10.000 fps)
    20.                         Interval: Discrete 0.200s (5.000 fps)
    21.                 Size: Discrete 176x144
    22.                         Interval: Discrete 0.033s (30.000 fps)
    23.                         Interval: Discrete 0.040s (25.000 fps)
    24.                         Interval: Discrete 0.050s (20.000 fps)
    25.                         Interval: Discrete 0.067s (15.000 fps)
    26.                         Interval: Discrete 0.100s (10.000 fps)
    27.                         Interval: Discrete 0.200s (5.000 fps)
    28.                 Size: Discrete 320x176
    29.                         Interval: Discrete 0.033s (30.000 fps)
    30.                         Interval: Discrete 0.040s (25.000 fps)
    31.                         Interval: Discrete 0.050s (20.000 fps)
    32.                         Interval: Discrete 0.067s (15.000 fps)
    33.                         Interval: Discrete 0.100s (10.000 fps)
    34.                         Interval: Discrete 0.200s (5.000 fps)
    35.                 Size: Discrete 320x240
    36.                         Interval: Discrete 0.033s (30.000 fps)
    37.                         Interval: Discrete 0.040s (25.000 fps)
    38.                         Interval: Discrete 0.050s (20.000 fps)
    39.                         Interval: Discrete 0.067s (15.000 fps)
    40.                         Interval: Discrete 0.100s (10.000 fps)
    41.                         Interval: Discrete 0.200s (5.000 fps)
    42.                 Size: Discrete 352x288
    43.                         Interval: Discrete 0.033s (30.000 fps)
    44.                         Interval: Discrete 0.040s (25.000 fps)
    45.                         Interval: Discrete 0.050s (20.000 fps)
    46.                         Interval: Discrete 0.067s (15.000 fps)
    47.                         Interval: Discrete 0.100s (10.000 fps)
    48.                         Interval: Discrete 0.200s (5.000 fps)
    49.                 Size: Discrete 432x240
    50.                         Interval: Discrete 0.033s (30.000 fps)
    51.                         Interval: Discrete 0.040s (25.000 fps)
    52.                         Interval: Discrete 0.050s (20.000 fps)
    53.                         Interval: Discrete 0.067s (15.000 fps)
    54.                         Interval: Discrete 0.100s (10.000 fps)
    55.                         Interval: Discrete 0.200s (5.000 fps)
    56.                 Size: Discrete 544x288
    57.                         Interval: Discrete 0.033s (30.000 fps)
    58.                         Interval: Discrete 0.040s (25.000 fps)
    59.                         Interval: Discrete 0.050s (20.000 fps)
    60.                         Interval: Discrete 0.067s (15.000 fps)
    61.                         Interval: Discrete 0.100s (10.000 fps)
    62.                         Interval: Discrete 0.200s (5.000 fps)
    63.                 Size: Discrete 640x360
    64.                         Interval: Discrete 0.033s (30.000 fps)
    65.                         Interval: Discrete 0.040s (25.000 fps)
    66.                         Interval: Discrete 0.050s (20.000 fps)
    67.                         Interval: Discrete 0.067s (15.000 fps)
    68.                         Interval: Discrete 0.100s (10.000 fps)
    69.                         Interval: Discrete 0.200s (5.000 fps)
    70.                 Size: Discrete 752x416
    71.                         Interval: Discrete 0.040s (25.000 fps)
    72.                         Interval: Discrete 0.050s (20.000 fps)
    73.                         Interval: Discrete 0.067s (15.000 fps)
    74.                         Interval: Discrete 0.100s (10.000 fps)
    75.                         Interval: Discrete 0.200s (5.000 fps)
    76.                 Size: Discrete 800x448
    77.                         Interval: Discrete 0.050s (20.000 fps)
    78.                         Interval: Discrete 0.067s (15.000 fps)
    79.                         Interval: Discrete 0.100s (10.000 fps)
    80.                         Interval: Discrete 0.200s (5.000 fps)
    81.                 Size: Discrete 800x600
    82.                         Interval: Discrete 0.050s (20.000 fps)
    83.                         Interval: Discrete 0.067s (15.000 fps)
    84.                         Interval: Discrete 0.100s (10.000 fps)
    85.                         Interval: Discrete 0.200s (5.000 fps)
    86.                 Size: Discrete 864x480
    87.                         Interval: Discrete 0.050s (20.000 fps)
    88.                         Interval: Discrete 0.067s (15.000 fps)
    89.                         Interval: Discrete 0.100s (10.000 fps)
    90.                         Interval: Discrete 0.200s (5.000 fps)
    91.                 Size: Discrete 960x544
    92.                         Interval: Discrete 0.067s (15.000 fps)
    93.                         Interval: Discrete 0.100s (10.000 fps)
    94.                         Interval: Discrete 0.200s (5.000 fps)
    95.                 Size: Discrete 960x720
    96.                         Interval: Discrete 0.100s (10.000 fps)
    97.                         Interval: Discrete 0.200s (5.000 fps)
    98.                 Size: Discrete 1024x576
    99.                         Interval: Discrete 0.100s (10.000 fps)
    100.                         Interval: Discrete 0.200s (5.000 fps)
    101.                 Size: Discrete 1184x656
    102.                         Interval: Discrete 0.100s (10.000 fps)
    103.                         Interval: Discrete 0.200s (5.000 fps)
    104.                 Size: Discrete 1280x720
    105.                         Interval: Discrete 0.133s (7.500 fps)
    106.                         Interval: Discrete 0.200s (5.000 fps)
    107.                 Size: Discrete 1280x960
    108.                         Interval: Discrete 0.133s (7.500 fps)
    109.                         Interval: Discrete 0.200s (5.000 fps)
    110.  
    111.         Index       : 1
    112.         Type        : Video Capture
    113.         Pixel Format: 'MJPG' (compressed)
    114.         Name        : Motion-JPEG
    115.                 Size: Discrete 640x480
    116.                         Interval: Discrete 0.033s (30.000 fps)
    117.                         Interval: Discrete 0.040s (25.000 fps)
    118.                         Interval: Discrete 0.050s (20.000 fps)
    119.                         Interval: Discrete 0.067s (15.000 fps)
    120.                         Interval: Discrete 0.100s (10.000 fps)
    121.                         Interval: Discrete 0.200s (5.000 fps)
    122.                 Size: Discrete 160x120
    123.                         Interval: Discrete 0.033s (30.000 fps)
    124.                         Interval: Discrete 0.040s (25.000 fps)
    125.                         Interval: Discrete 0.050s (20.000 fps)
    126.                         Interval: Discrete 0.067s (15.000 fps)
    127.                         Interval: Discrete 0.100s (10.000 fps)
    128.                         Interval: Discrete 0.200s (5.000 fps)
    129.                 Size: Discrete 176x144
    130.                         Interval: Discrete 0.033s (30.000 fps)
    131.                         Interval: Discrete 0.040s (25.000 fps)
    132.                         Interval: Discrete 0.050s (20.000 fps)
    133.                         Interval: Discrete 0.067s (15.000 fps)
    134.                         Interval: Discrete 0.100s (10.000 fps)
    135.                         Interval: Discrete 0.200s (5.000 fps)
    136.                 Size: Discrete 320x176
    137.                         Interval: Discrete 0.033s (30.000 fps)
    138.                         Interval: Discrete 0.040s (25.000 fps)
    139.                         Interval: Discrete 0.050s (20.000 fps)
    140.                         Interval: Discrete 0.067s (15.000 fps)
    141.                         Interval: Discrete 0.100s (10.000 fps)
    142.                         Interval: Discrete 0.200s (5.000 fps)
    143.                 Size: Discrete 320x240
    144.                         Interval: Discrete 0.033s (30.000 fps)
    145.                         Interval: Discrete 0.040s (25.000 fps)
    146.                         Interval: Discrete 0.050s (20.000 fps)
    147.                         Interval: Discrete 0.067s (15.000 fps)
    148.                         Interval: Discrete 0.100s (10.000 fps)
    149.                         Interval: Discrete 0.200s (5.000 fps)
    150.                 Size: Discrete 352x288
    151.                         Interval: Discrete 0.033s (30.000 fps)
    152.                         Interval: Discrete 0.040s (25.000 fps)
    153.                         Interval: Discrete 0.050s (20.000 fps)
    154.                         Interval: Discrete 0.067s (15.000 fps)
    155.                         Interval: Discrete 0.100s (10.000 fps)
    156.                         Interval: Discrete 0.200s (5.000 fps)
    157.                 Size: Discrete 432x240
    158.                         Interval: Discrete 0.033s (30.000 fps)
    159.                         Interval: Discrete 0.040s (25.000 fps)
    160.                         Interval: Discrete 0.050s (20.000 fps)
    161.                         Interval: Discrete 0.067s (15.000 fps)
    162.                         Interval: Discrete 0.100s (10.000 fps)
    163.                         Interval: Discrete 0.200s (5.000 fps)
    164.                 Size: Discrete 544x288
    165.                         Interval: Discrete 0.033s (30.000 fps)
    166.                         Interval: Discrete 0.040s (25.000 fps)
    167.                         Interval: Discrete 0.050s (20.000 fps)
    168.                         Interval: Discrete 0.067s (15.000 fps)
    169.                         Interval: Discrete 0.100s (10.000 fps)
    170.                         Interval: Discrete 0.200s (5.000 fps)
    171.                 Size: Discrete 640x360
    172.                         Interval: Discrete 0.033s (30.000 fps)
    173.                         Interval: Discrete 0.040s (25.000 fps)
    174.                         Interval: Discrete 0.050s (20.000 fps)
    175.                         Interval: Discrete 0.067s (15.000 fps)
    176.                         Interval: Discrete 0.100s (10.000 fps)
    177.                         Interval: Discrete 0.200s (5.000 fps)
    178.                 Size: Discrete 752x416
    179.                         Interval: Discrete 0.033s (30.000 fps)
    180.                         Interval: Discrete 0.040s (25.000 fps)
    181.                         Interval: Discrete 0.050s (20.000 fps)
    182.                         Interval: Discrete 0.067s (15.000 fps)
    183.                         Interval: Discrete 0.100s (10.000 fps)
    184.                         Interval: Discrete 0.200s (5.000 fps)
    185.                 Size: Discrete 800x448
    186.                         Interval: Discrete 0.033s (30.000 fps)
    187.                         Interval: Discrete 0.040s (25.000 fps)
    188.                         Interval: Discrete 0.050s (20.000 fps)
    189.                         Interval: Discrete 0.067s (15.000 fps)
    190.                         Interval: Discrete 0.100s (10.000 fps)
    191.                         Interval: Discrete 0.200s (5.000 fps)
    192.                 Size: Discrete 800x600
    193.                         Interval: Discrete 0.033s (30.000 fps)
    194.                         Interval: Discrete 0.040s (25.000 fps)
    195.                         Interval: Discrete 0.050s (20.000 fps)
    196.                         Interval: Discrete 0.067s (15.000 fps)
    197.                         Interval: Discrete 0.100s (10.000 fps)
    198.                         Interval: Discrete 0.200s (5.000 fps)
    199.                 Size: Discrete 864x480
    200.                         Interval: Discrete 0.033s (30.000 fps)
    201.                         Interval: Discrete 0.040s (25.000 fps)
    202.                         Interval: Discrete 0.050s (20.000 fps)
    203.                         Interval: Discrete 0.067s (15.000 fps)
    204.                         Interval: Discrete 0.100s (10.000 fps)
    205.                         Interval: Discrete 0.200s (5.000 fps)
    206.                 Size: Discrete 960x544
    207.                         Interval: Discrete 0.033s (30.000 fps)
    208.                         Interval: Discrete 0.040s (25.000 fps)
    209.                         Interval: Discrete 0.050s (20.000 fps)
    210.                         Interval: Discrete 0.067s (15.000 fps)
    211.                         Interval: Discrete 0.100s (10.000 fps)
    212.                         Interval: Discrete 0.200s (5.000 fps)
    213.                 Size: Discrete 960x720
    214.                         Interval: Discrete 0.033s (30.000 fps)
    215.                         Interval: Discrete 0.040s (25.000 fps)
    216.                         Interval: Discrete 0.050s (20.000 fps)
    217.                         Interval: Discrete 0.067s (15.000 fps)
    218.                         Interval: Discrete 0.100s (10.000 fps)
    219.                         Interval: Discrete 0.200s (5.000 fps)
    220.                 Size: Discrete 1024x576
    221.                         Interval: Discrete 0.033s (30.000 fps)
    222.                         Interval: Discrete 0.040s (25.000 fps)
    223.                         Interval: Discrete 0.050s (20.000 fps)
    224.                         Interval: Discrete 0.067s (15.000 fps)
    225.                         Interval: Discrete 0.100s (10.000 fps)
    226.                         Interval: Discrete 0.200s (5.000 fps)
    227.                 Size: Discrete 1184x656
    228.                         Interval: Discrete 0.033s (30.000 fps)
    229.                         Interval: Discrete 0.040s (25.000 fps)
    230.                         Interval: Discrete 0.050s (20.000 fps)
    231.                         Interval: Discrete 0.067s (15.000 fps)
    232.                         Interval: Discrete 0.100s (10.000 fps)
    233.                         Interval: Discrete 0.200s (5.000 fps)
    234.                 Size: Discrete 1280x720
    235.                         Interval: Discrete 0.033s (30.000 fps)
    236.                         Interval: Discrete 0.040s (25.000 fps)
    237.                         Interval: Discrete 0.050s (20.000 fps)
    238.                         Interval: Discrete 0.067s (15.000 fps)
    239.                         Interval: Discrete 0.100s (10.000 fps)
    240.                         Interval: Discrete 0.200s (5.000 fps)
    241.                 Size: Discrete 1280x960
    242.                         Interval: Discrete 0.033s (30.000 fps)
    243.                         Interval: Discrete 0.040s (25.000 fps)
    244.                         Interval: Discrete 0.050s (20.000 fps)
    245.                         Interval: Discrete 0.067s (15.000 fps)
    246.                         Interval: Discrete 0.100s (10.000 fps)
    247.                         Interval: Discrete 0.200s (5.000 fps)
    248.

     网上的是csi的

     

    这里更精确地列出了这个摄像头的细节参数，例如显示的“RG10”就算代表这个摄像头的数据格式，下面的“10-bit Bayer RGRG/GBGB”则是进一步说明这个格式使用的算法与通道对应的参数。

    再下面的尺寸，例如 3264x2464，其下还有对应的 Interval 性能参数，表示所支持的分辨率，以及该分辨率的最高执行帧率，这样的信息量才能够帮助我们在后面开发应用时作为设定的依据。

    其他的设备，请自行修改。

    1.  v4l2-ctl -d /dev/video0 --all
    2. Driver Info (not using libv4l2):
    3.         Driver name   : uvcvideo
    4.         Card type     : UVC Camera (046d:0825)
    5.         Bus info      : usb-70090000.xusb-2
    6.         Driver version: 4.9.253
    7.         Capabilities  : 0x84200001
    8.                 Video Capture
    9.                 Streaming
    10.                 Extended Pix Format
    11.                 Device Capabilities
    12.         Device Caps   : 0x04200001
    13.                 Video Capture
    14.                 Streaming
    15.                 Extended Pix Format
    16. Priority: 2
    17. Video input : 0 (Camera 1: ok)
    18. Format Video Capture:
    19.         Width/Height      : 640/480
    20.         Pixel Format      : 'YUYV'
    21.         Field             : None
    22.         Bytes per Line    : 1280
    23.         Size Image        : 614400
    24.         Colorspace        : sRGB
    25.         Transfer Function : Default (maps to sRGB)
    26.         YCbCr/HSV Encoding: Default (maps to ITU-R 601)
    27.         Quantization      : Default (maps to Limited Range)
    28.         Flags             :
    29. Crop Capability Video Capture:
    30.         Bounds      : Left 0, Top 0, Width 640, Height 480
    31.         Default     : Left 0, Top 0, Width 640, Height 480
    32.         Pixel Aspect: 1/1
    33. Selection: crop_default, Left 0, Top 0, Width 640, Height 480
    34. Selection: crop_bounds, Left 0, Top 0, Width 640, Height 480
    35. Streaming Parameters Video Capture:
    36.         Capabilities     : timeperframe
    37.         Frames per second: 30.000 (30/1)
    38.         Read buffers     : 0
    39.                      brightness 0x00980900 (int)    : min=0 max=255 step=1 default=128 value=128
    40.                        contrast 0x00980901 (int)    : min=0 max=255 step=1 default=32 value=32
    41.                      saturation 0x00980902 (int)    : min=0 max=255 step=1 default=32 value=32
    42.  white_balance_temperature_auto 0x0098090c (bool)   : default=1 value=1
    43.                            gain 0x00980913 (int)    : min=0 max=255 step=1 default=64 value=64
    44.            power_line_frequency 0x00980918 (menu)   : min=0 max=2 default=2 value=2
    45.       white_balance_temperature 0x0098091a (int)    : min=0 max=10000 step=10 default=4000 value=4000 flags=inactive
    46.                       sharpness 0x0098091b (int)    : min=0 max=255 step=1 default=24 value=24
    47.          backlight_compensation 0x0098091c (int)    : min=0 max=1 step=1 default=0 value=0
    48.                   exposure_auto 0x009a0901 (menu)   : min=0 max=3 default=3 value=3
    49.               exposure_absolute 0x009a0902 (int)    : min=1 max=10000 step=1 default=166 value=166 flags=inactive
    50.          exposure_auto_priority 0x009a0903 (bool)   : default=0 value=1

     

    可以看到摄像头的所有的参数，并且可以看到摄像头的默认参数。
    还有输入v4l2-ctl help 查看不同参数的具体意思

    要是可以让设备树工程师帮你看看 

     

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  • 原文地址：https://blog.csdn.net/weixin_46151178/article/details/127104809