.png)
我的网络摄像头在 Pop OS 22.04 和 LMDE 4 上似乎有问题。我在 Xubuntu 18.04 上完美地使用了相同的设备。
当尝试使用相机时cheese，guvcview我经常会出现白屏，但最终会得到预期的图像。捕获的音频似乎有效，但它显然影响了 Google Meet 上的视频通话。我注意到音频接收不稳定，并且没有证据表明互联网连接存在问题。
调试信息：
$ lsusb
Bus 001 Device 005: ID 0a5c:5800 Broadcom Corp. BCM5880 Secure Applications Processor
Bus 001 Device 004: ID 1bcf:28ae Sunplus Innovation Technology Inc. Laptop Integrated Webcam HD
Bus 001 Device 003: ID 8087:0a2a Intel Corp. Bluetooth wireless interface
Bus 001 Device 002: ID 8087:8001 Intel Corp. Integrated Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 002 Device 005: ID 04f3:0210 Elan Microelectronics Corp. Optical Mouse
Bus 002 Device 003: ID 0781:5575 SanDisk Corp. Cruzer Glide
Bus 002 Device 007: ID 046d:0825 Logitech, Inc. Webcam C270
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
$ v4l2-ctl --list-devices
UVC Camera (046d:0825) (usb-0000:00:14.0-1):
/dev/video0
/dev/video1
/dev/media0
Integrated_Webcam_HD: Integrate (usb-0000:00:1d.0-1.6):
/dev/video2
/dev/video3
/dev/media1
$ xinput --list
⎡ Virtual core pointer id=2 [master pointer (3)]
⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)]
⎜ ↳ AlpsPS/2 ALPS GlidePoint id=15 [slave pointer (2)]
⎜ ↳ PS/2+USB Mouse id=11 [slave pointer (2)]
⎣ Virtual core keyboard id=3 [master keyboard (2)]
↳ Virtual core XTEST keyboard id=5 [slave keyboard (3)]
↳ Power Button id=6 [slave keyboard (3)]
↳ Video Bus id=7 [slave keyboard (3)]
↳ Power Button id=8 [slave keyboard (3)]
↳ Sleep Button id=9 [slave keyboard (3)]
↳ Integrated_Webcam_HD: Integrate id=12 [slave keyboard (3)]
↳ Dell WMI hotkeys id=13 [slave keyboard (3)]
↳ AT Translated Set 2 keyboard id=14 [slave keyboard (3)]
↳ DELL Wireless hotkeys id=16 [slave keyboard (3)]
↳ UVC Camera (046d:0825) id=10 [slave keyboard (3)]
当我将设备插入 USB 端口时：
Jun 17 11:22:11 pop-os kernel: usb 2-1: new high-speed USB device number 8 using xhci_hcd
Jun 17 11:22:12 pop-os kernel: usb 2-1: New USB device found, idVendor=046d, idProduct=0825, bcdDevice= 0.12
Jun 17 11:22:12 pop-os kernel: usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=2
Jun 17 11:22:12 pop-os kernel: usb 2-1: SerialNumber: BD107460
Jun 17 11:22:12 pop-os kernel: usb 2-1: Found UVC 1.00 device <unnamed> (046d:0825)
Jun 17 11:22:12 pop-os kernel: input: UVC Camera (046d:0825) as /devices/pci0000:00/0000:00:14.0/usb2/2-1/2-1:1.0/input/input24
Jun 17 11:22:12 pop-os kernel: usb 2-1: set resolution quirk: cval->res = 384
Jun 17 11:22:12 pop-os mtp-probe[63240]: checking bus 2, device 8: "/sys/devices/pci0000:00/0000:00:14.0/usb2/2-1"
Jun 17 11:22:12 pop-os mtp-probe[63240]: bus: 2, device: 8 was not an MTP device
Jun 17 11:22:12 pop-os /usr/libexec/gdm-x-session[2321]: (II) config/udev: Adding input device UVC Camera (046d:0825) (/dev/input/event18)
Jun 17 11:22:12 pop-os /usr/libexec/gdm-x-session[2321]: (**) UVC Camera (046d:0825): Applying InputClass "libinput keyboard catchall"
Jun 17 11:22:12 pop-os /usr/libexec/gdm-x-session[2321]: (II) Using input driver 'libinput' for 'UVC Camera (046d:0825)'
Jun 17 11:22:12 pop-os /usr/libexec/gdm-x-session[2321]: (II) systemd-logind: got fd for /dev/input/event18 13:82 fd 107 paused 0
Jun 17 11:22:12 pop-os /usr/libexec/gdm-x-session[2321]: (**) UVC Camera (046d:0825): always reports core events
Jun 17 11:22:12 pop-os /usr/libexec/gdm-x-session[2321]: (**) Option "Device" "/dev/input/event18"
Jun 17 11:22:12 pop-os /usr/libexec/gdm-x-session[2321]: (II) event18 - UVC Camera (046d:0825): is tagged by udev as: Keyboard
Jun 17 11:22:12 pop-os /usr/libexec/gdm-x-session[2321]: (II) event18 - UVC Camera (046d:0825): device is a keyboard
Jun 17 11:22:12 pop-os /usr/libexec/gdm-x-session[2321]: (II) event18 - UVC Camera (046d:0825): device removed
Jun 17 11:22:12 pop-os /usr/libexec/gdm-x-session[2321]: (**) Option "config_info" "udev:/sys/devices/pci0000:00/0000:00:14.0/usb2/2-1/2-1:1.0/input/input24/event18"
Jun 17 11:22:12 pop-os /usr/libexec/gdm-x-session[2321]: (II) XINPUT: Adding extended input device "UVC Camera (046d:0825)" (type: KEYBOARD, id 10)
Jun 17 11:22:12 pop-os /usr/libexec/gdm-x-session[2321]: (**) Option "xkb_layout" "us"
Jun 17 11:22:12 pop-os /usr/libexec/gdm-x-session[2321]: (**) Option "xkb_variant" "intl"
Jun 17 11:22:12 pop-os /usr/libexec/gdm-x-session[2321]: (II) event18 - UVC Camera (046d:0825): is tagged by udev as: Keyboard
Jun 17 11:22:12 pop-os /usr/libexec/gdm-x-session[2321]: (II) event18 - UVC Camera (046d:0825): device is a keyboard
Jun 17 11:22:12 pop-os mtp-probe[63265]: checking bus 2, device 8: "/sys/devices/pci0000:00/0000:00:14.0/usb2/2-1"
Jun 17 11:22:12 pop-os mtp-probe[63265]: bus: 2, device: 8 was not an MTP device
Jun 17 11:22:12 pop-os gnome-shell[2492]: Window manager warning: Overwriting existing binding of keysym 6f with keysym 6f (keycode 20).
测试设备：
$ guvcview -d /dev/video0
GUVCVIEW: version 2.0.7
V4L2_CORE: (UVCIOC_CTRL_MAP) Error: No such file or directory
V4L2_CORE: (UVCIOC_CTRL_MAP) Error: No such file or directory
V4L2_CORE: (UVCIOC_CTRL_MAP) Error: No such file or directory
V4L2_CORE: (UVCIOC_CTRL_MAP) Error: No such file or directory
V4L2_CORE: (UVCIOC_CTRL_MAP) Error: No such file or directory
V4L2_CORE: (UVCIOC_CTRL_MAP) Error: No such file or directory
V4L2_CORE: (UVCIOC_CTRL_MAP) Error: No such file or directory
V4L2_CORE: (UVCIOC_CTRL_MAP) Error: No such file or directory
V4L2_CORE: (UVCIOC_CTRL_MAP) Error: No such file or directory
ALSA lib pcm_dsnoop.c:601:(snd_pcm_dsnoop_open) unable to open slave
ALSA lib pcm_dmix.c:1032:(snd_pcm_dmix_open) unable to open slave
ALSA lib pcm.c:2664:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.rear
ALSA lib pcm.c:2664:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.center_lfe
ALSA lib pcm.c:2664:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.side
ALSA lib pcm_oss.c:397:(_snd_pcm_oss_open) Cannot open device /dev/dsp
ALSA lib pcm_oss.c:397:(_snd_pcm_oss_open) Cannot open device /dev/dsp
ALSA lib confmisc.c:160:(snd_config_get_card) Invalid field card
ALSA lib pcm_usb_stream.c:482:(_snd_pcm_usb_stream_open) Invalid card 'card'
ALSA lib confmisc.c:160:(snd_config_get_card) Invalid field card
ALSA lib pcm_usb_stream.c:482:(_snd_pcm_usb_stream_open) Invalid card 'card'
ALSA lib pcm_dmix.c:1032:(snd_pcm_dmix_open) unable to open slave
control[0]:(unknown - 0x6) 0x980001 'User Controls'
control[10]:(unknown - 0x6) 0x9a0001 'Camera Controls'
V4L2_CORE: Could not grab image (select timeout): Resource temporarily unavailable
GUVCVIEW: error setting spin value
control id: 0x009a0902 failed to set (error -1)
GUVCVIEW: error setting spin value
$ cheese
(cheese:63521): cheese-WARNING **: 11:24:05.261: A lot of buffers are being dropped.: ../libs/gst/base/gstbasesink.c(3143): gst_base_sink_is_too_late (): /GstCameraBin:camerabin/GstViewfinderBin:vf-bin/ClutterGstVideoSink:cluttergstvideosink0:
There may be a timestamping problem, or this computer is too slow.
我还注意到了这些错误：
Jun 17 10:41:37 pop-os kernel: usb 2-1: Failed to query (SET_CUR) UVC control 10 on unit 2: -32 (exp. 2).
Jun 17 11:24:02 pop-os kernel: usb 2-1: Failed to query (SET_CUR) UVC control 4 on unit 1: -32 (exp. 4).
Jun 17 11:24:02 pop-os kernel: uvcvideo 2-1:1.0: reset_resume error -5
笔记：
- 我可以使用集成网络摄像头，没问题
- 我可以使用网络摄像头麦克风
- Gstreamer已安装
- ffmpeg 已安装
ubuntu-restricted-extras软件包已安装- 我的用户属于该
video组 - 我成功地通过 Zoom 和 Google Meet 使用过一次相机。该问题是间歇性的，但似乎大多数时候都失败