VIDIOC_G_标准：失败：ioctl doer设备不正确

Question

我尝试了以下命令：

v4l2-ctl -d 0 --get-standard

但是我得到了错误

VIDIOC_G_STD: failed: Inappropriate ioctl for device

但是，下面的命令可以完全正常工作

v4l2-ctl -d 0 --all

任何帮助都将不胜感激。在我的程序中，当重置相机的控件时，我得到了设备的不适当ioctl

v4l2-compliance

上述命令未能通过四次测试。我在下面展示了一些失败的测试。我确实需要维迪奥·奎里克特尔来工作

    Driver name   : uvcvideo
    Card type     : HD Web Camera
    Bus info      : usb-3610000.xhci-4.1
    Driver version: 4.9.140
    Capabilities  : 0x84200001
        Video Capture
        Streaming
        Extended Pix Format
        Device Capabilities
    Device Caps   : 0x04200001
        Video Capture
        Streaming
        Extended Pix Format
Compliance test for device /dev/video0 (not using libv4l2):

Test input 0:
    Control ioctls:
        fail: v4l2-test-controls.cpp(202): invalid query_ext_ctrl return code (5)
        test VIDIOC_QUERY_EXT_CTRL/QUERYMENU: FAIL
        fail: v4l2-test-controls.cpp(312): invalid queryctrl return code (5)
        test VIDIOC_QUERYCTRL: FAIL
    V4L2_CAP_TIMEPERFRAME
        fail: v4l2-test-formats.cpp(1140): node->has_frmintervals && !cap->capability
        test VIDIOC_G/S_PARM: FAIL
        test VIDIOC_G_FMT: FAIL
        test VIDIOC_REQBUFS/CREATE_BUFS/QUERYBUF: OK
        fail: v4l2-test-buffers.cpp(574): VIDIOC_EXPBUF is supported, but the V4L2_MEMORY_MMAP support is missing, probably due to earlier failing format tests.
Test input 0: