自从 Ubuntu 16 以来，我一直有这个持续存在的问题...我的笔记本电脑上的摄像头无法工作。
我已经遇到这个问题四年了，我尝试了谷歌的所有解决方案，并定期检查是否有任何新的解决方案。但都没有用！！
我目前有一个全新安装的 Ubuntu 20.04.1 我的笔记本电脑是联想 ideapad，相机是 Easycamera
cheese 说“播放网络摄像头的视频时出错” -
"Failed to allocate required memory.: gstv4l2src.c(660): gst_v4l2src_decide_allocation (): /GstCameraBin:camerabin/GstWrapperCameraBinSrc:camera_source/GstBin:bin20/GstV4l2Src:v4l2src3: Buffer pool activation failed"vlc 说
"v4l2 demux error: cannot start streaming: Protocol error"在黑屏时缩放会滞后。
当我尝试使用相机时，我还看到相机旁边的 LED 灯闪烁，但没有看到图像。相机正在运行并且有效。
一些常规输出：
- 须藤lshw
- lsmod | grep uvcvideo
- v4l2-ctl --列表设备
- ls-ltrh/dev/video*
- 消息 | grep -i 相机
- 消息 | grep -i 1-5
- sudo v4l2-ctl -d /dev/video1 --all
- sudo v4l2-合规性-d / dev / video1
$ sudo lshw
*-usb:2
description: Video
product: EasyCamera
vendor: AzureWave
physical id: 5
bus info: usb@1:5
version: 16.04
serial: 0001
capabilities: usb-2.00
configuration: driver=uvcvideo maxpower=500mA speed=480Mbit/s
$ lsmod | grep uvcvideo
uvcvideo 98304 0
videobuf2_vmalloc 20480 1 uvcvideo
videobuf2_v4l2 24576 1 uvcvideo
videobuf2_common 53248 2 videobuf2_v4l2,uvcvideo
videodev 237568 4 videobuf2_v4l2,v4l2loopback_dc,uvcvideo,videobuf2_common
mc 57344 4 videodev,videobuf2_v4l2,uvcvideo,videobuf2_common
因为我的相机无法工作，所以我正在通过手机相机使用Droidcam......
$ v4l2-ctl --list-devices
Droidcam (platform:v4l2loopback_dc-000):
/dev/video0
EasyCamera: EasyCamera (usb-0000:00:14.0-5):
/dev/video1
/dev/video2
ls -ltrh /dev/video*
crw-rw----+ 1 root video 81, 0 Jan 9 21:02 /dev/video0
crw-rw----+ 1 root video 81, 2 Jan 9 21:02 /dev/video2
crw-rw----+ 1 root video 81, 1 Jan 9 21:02 /dev/video1
When i start my computer this is the output
$ dmesg | grep -i camera
[ 2.029718] usb 1-5: Product: EasyCamera
[ 2.729222] uvcvideo: Found UVC 1.00 device EasyCamera (13d3:5673)
[ 2.734513] input: EasyCamera: EasyCamera as /devices/pci0000:00/0000:00:14.0/usb1/1-5/1-5:1.0/input/input10
和
$ dmesg | grep -i 1-5
[ 1.839392] usb 1-5: new high-speed USB device number 4 using xhci_hcd
[ 2.029707] usb 1-5: New USB device found, idVendor=13d3, idProduct=5673, bcdDevice=16.04
[ 2.029717] usb 1-5: New USB device strings: Mfr=3, Product=1, SerialNumber=2
[ 2.029718] usb 1-5: Product: EasyCamera
[ 2.029720] usb 1-5: Manufacturer: AzureWave
[ 2.029721] usb 1-5: SerialNumber: 0001
[ 2.734513] input: EasyCamera: EasyCamera as /devices/pci0000:00/0000:00:14.0/usb1/1-5/1-5:1.0/input/input10
[ 488.765312] usb 1-5: USB disconnect, device number 4
[ 489.148174] usb 1-5: new high-speed USB device number 6 using xhci_hcd
[ 489.342853] usb 1-5: New USB device found, idVendor=13d3, idProduct=5673, bcdDevice=16.04
[ 489.342856] usb 1-5: New USB device strings: Mfr=3, Product=1, SerialNumber=2
[ 489.342859] usb 1-5: Product: EasyCamera
[ 489.342861] usb 1-5: Manufacturer: AzureWave
[ 489.342863] usb 1-5: SerialNumber: 0001
但在我尝试使用我的相机后，我得到了重复的输出（也许这是一个线索）：
dmesg | grep -i camera
[ 2.029718] usb 1-5: Product: EasyCamera
[ 2.729222] uvcvideo: Found UVC 1.00 device EasyCamera (13d3:5673)
[ 2.734513] input: EasyCamera: EasyCamera as /devices/pci0000:00/0000:00:14.0/usb1/1-5/1-5:1.0/input/input10
[ 489.342859] usb 1-5: Product: EasyCamera
[ 489.348052] uvcvideo: Found UVC 1.00 device EasyCamera (13d3:5673)
[ 489.353594] input: EasyCamera: EasyCamera as /devices/pci0000:00/0000:00:14.0/usb1/1-5/1-5:1.0/input/input20
[ 526.011437] usb 1-5: Product: EasyCamera
[ 526.018596] uvcvideo: Found UVC 1.00 device EasyCamera (13d3:5673)
[ 526.024153] input: EasyCamera: EasyCamera as /devices/pci0000:00/0000:00:14.0/usb1/1-5/1-5:1.0/input/input21
[ 576.650603] usb 1-5: Product: EasyCamera
[ 576.654826] uvcvideo: Found UVC 1.00 device EasyCamera (13d3:5673)
[ 576.662541] input: EasyCamera: EasyCamera as /devices/pci0000:00/0000:00:14.0/usb1/1-5/1-5:1.0/input/input22
[ 582.143837] usb 1-5: Product: EasyCamera
[ 582.148263] uvcvideo: Found UVC 1.00 device EasyCamera (13d3:5673)
[ 582.154765] input: EasyCamera: EasyCamera as /devices/pci0000:00/0000:00:14.0/usb1/1-5/1-5:1.0/input/input23
$ sudo v4l2-ctl -d /dev/video1 --all
Driver Info:
Driver name : uvcvideo
Card type : EasyCamera: EasyCamera
Bus info : usb-0000:00:14.0-5
Driver version : 5.8.18
Capabilities : 0x84a00001
Video Capture
Metadata Capture
Streaming
Extended Pix Format
Device Capabilities
Device Caps : 0x04200001
Video Capture
Streaming
Extended Pix Format
Media Driver Info:
Driver name : uvcvideo
Model : EasyCamera: EasyCamera
Serial : 0001
Bus info : usb-0000:00:14.0-5
Media version : 5.8.18
Hardware revision: 0x00001604 (5636)
Driver version : 5.8.18
Interface Info:
ID : 0x03000002
Type : V4L Video
Entity Info:
ID : 0x00000001 (1)
Name : EasyCamera: EasyCamera
Function : V4L2 I/O
Flags : default
Pad 0x01000007 : 0: Sink
Priority: 2
Video input : 0 (Camera 1: ok)
Format Video Capture:
Width/Height : 1280/720
Pixel Format : 'MJPG' (Motion-JPEG)
Field : None
Bytes per Line : 0
Size Image : 1843200
Colorspace : sRGB
Transfer Function : Default (maps to sRGB)
YCbCr/HSV Encoding: Default (maps to ITU-R 601)
Quantization : Default (maps to Full Range)
Flags :
Crop Capability Video Capture:
Bounds : Left 0, Top 0, Width 1280, Height 720
Default : Left 0, Top 0, Width 1280, Height 720
Pixel Aspect: 1/1
Selection Video Capture: crop_default, Left 0, Top 0, Width 1280, Height 720, Flags:
Selection Video Capture: crop_bounds, Left 0, Top 0, Width 1280, Height 720, Flags:
Streaming Parameters Video Capture:
Capabilities : timeperframe
Frames per second: 30.000 (30/1)
Read buffers : 0
brightness 0x00980900 (int) : min=0 max=100 step=1 default=50 value=50
contrast 0x00980901 (int) : min=0 max=100 step=1 default=50 value=50
saturation 0x00980902 (int) : min=0 max=100 step=1 default=50 value=50
hue 0x00980903 (int) : min=0 max=100 step=1 default=50 value=50
white_balance_temperature_auto 0x0098090c (bool) : default=1 value=1
gamma 0x00980910 (int) : min=0 max=100 step=1 default=50 value=50
power_line_frequency 0x00980918 (menu) : min=0 max=2 default=1 value=1
0: Disabled
1: 50 Hz
2: 60 Hz
white_balance_temperature 0x0098091a (int) : min=2500 max=6500 step=10 default=4500 value=4500 flags=inactive
sharpness 0x0098091b (int) : min=0 max=100 step=1 default=50 value=50
backlight_compensation 0x0098091c (int) : min=0 max=2 step=1 default=0 value=0
exposure_auto_priority 0x009a0903 (bool) : default=0 value=1
$ sudo v4l2-compliance -d /dev/video1
v4l2-compliance SHA: not available, 64 bits
Compliance test for uvcvideo device /dev/video1:
Driver Info:
Driver name : uvcvideo
Card type : EasyCamera: EasyCamera
Bus info : usb-0000:00:14.0-5
Driver version : 5.8.18
Capabilities : 0x84a00001
Video Capture
Metadata Capture
Streaming
Extended Pix Format
Device Capabilities
Device Caps : 0x04200001
Video Capture
Streaming
Extended Pix Format
Media Driver Info:
Driver name : uvcvideo
Model : EasyCamera: EasyCamera
Serial : 0001
Bus info : usb-0000:00:14.0-5
Media version : 5.8.18
Hardware revision: 0x00001604 (5636)
Driver version : 5.8.18
Interface Info:
ID : 0x03000002
Type : V4L Video
Entity Info:
ID : 0x00000001 (1)
Name : EasyCamera: EasyCamera
Function : V4L2 I/O
Flags : default
Pad 0x01000007 : 0: Sink
Required ioctls:
test MC information (see 'Media Driver Info' above): OK
test VIDIOC_QUERYCAP: OK
Allow for multiple opens:
test second /dev/video1 open: OK
test VIDIOC_QUERYCAP: OK
test VIDIOC_G/S_PRIORITY: OK
test for unlimited opens: OK
Debug ioctls:
test VIDIOC_DBG_G/S_REGISTER: OK (Not Supported)
test VIDIOC_LOG_STATUS: OK (Not Supported)
Input ioctls:
test VIDIOC_G/S_TUNER/ENUM_FREQ_BANDS: OK (Not Supported)
test VIDIOC_G/S_FREQUENCY: OK (Not Supported)
test VIDIOC_S_HW_FREQ_SEEK: OK (Not Supported)
test VIDIOC_ENUMAUDIO: OK (Not Supported)
test VIDIOC_G/S/ENUMINPUT: OK
test VIDIOC_G/S_AUDIO: OK (Not Supported)
Inputs: 1 Audio Inputs: 0 Tuners: 0
Output ioctls:
test VIDIOC_G/S_MODULATOR: OK (Not Supported)
test VIDIOC_G/S_FREQUENCY: OK (Not Supported)
test VIDIOC_ENUMAUDOUT: OK (Not Supported)
test VIDIOC_G/S/ENUMOUTPUT: OK (Not Supported)
test VIDIOC_G/S_AUDOUT: OK (Not Supported)
Outputs: 0 Audio Outputs: 0 Modulators: 0
Input/Output configuration ioctls:
test VIDIOC_ENUM/G/S/QUERY_STD: OK (Not Supported)
test VIDIOC_ENUM/G/S/QUERY_DV_TIMINGS: OK (Not Supported)
test VIDIOC_DV_TIMINGS_CAP: OK (Not Supported)
test VIDIOC_G/S_EDID: OK (Not Supported)
Control ioctls (Input 0):
fail: v4l2-test-controls.cpp(216): missing control class for class 00980000
fail: v4l2-test-controls.cpp(253): missing control class for class 009a0000
test VIDIOC_QUERY_EXT_CTRL/QUERYMENU: FAIL
test VIDIOC_QUERYCTRL: OK
warn: v4l2-test-controls.cpp(442): s_ctrl returned EILSEQ
test VIDIOC_G/S_CTRL: OK
warn: v4l2-test-controls.cpp(691): s_ext_ctrls returned EILSEQ
warn: v4l2-test-controls.cpp(715): g_ext_ctrls(0) invalid error_idx 0
warn: v4l2-test-controls.cpp(766): s_ext_ctrls returned EILSEQ
warn: v4l2-test-controls.cpp(782): error_idx should be equal to count
warn: v4l2-test-controls.cpp(803): error_idx should be equal to count
fail: v4l2-test-controls.cpp(808): doioctl(node, VIDIOC_G_EXT_CTRLS, &ctrls)
test VIDIOC_G/S/TRY_EXT_CTRLS: FAIL
test VIDIOC_(UN)SUBSCRIBE_EVENT/DQEVENT: OK
test VIDIOC_G/S_JPEGCOMP: OK (Not Supported)
Standard Controls: 11 Private Controls: 0
Format ioctls (Input 0):
test VIDIOC_ENUM_FMT/FRAMESIZES/FRAMEINTERVALS: OK
warn: v4l2-test-formats.cpp(1327): S_PARM is supported but doesn't report V4L2_CAP_TIMEPERFRAME
fail: v4l2-test-formats.cpp(1229): node->has_frmintervals && !cap->capability
test VIDIOC_G/S_PARM: FAIL
test VIDIOC_G_FBUF: OK (Not Supported)
test VIDIOC_G_FMT: OK
test VIDIOC_TRY_FMT: OK
warn: v4l2-test-formats.cpp(976): Could not set fmt2
test VIDIOC_S_FMT: OK
test VIDIOC_G_SLICED_VBI_CAP: OK (Not Supported)
test Cropping: OK (Not Supported)
test Composing: OK (Not Supported)
test Scaling: OK (Not Supported)
Codec ioctls (Input 0):
test VIDIOC_(TRY_)ENCODER_CMD: OK (Not Supported)
test VIDIOC_G_ENC_INDEX: OK (Not Supported)
test VIDIOC_(TRY_)DECODER_CMD: OK (Not Supported)
Buffer ioctls (Input 0):
test VIDIOC_REQBUFS/CREATE_BUFS/QUERYBUF: OK
test VIDIOC_EXPBUF: OK
fail: v4l2-test-buffers.cpp(1833): ret != EINVAL && ret != EBADR && ret != ENOTTY
test Requests: FAIL
Total for uvcvideo device /dev/video1: 45, Succeeded: 41, Failed: 4, Warnings: 8
我可以提供更多必要的信息。
感谢任何指点或解决方案。