Raspberry pi Raspberry Pi网络摄像头无法打开视频设备

错误“无法打开视频设备”

我使用的是带有覆盆子pi的HP豪华网络摄像头（EW193AA）

lsusb日志

Bus 001 Device 002: ID 0424:9514 Standard Microsystems Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp.
Bus 001 Device 006: ID 093a:2621 Pixart Imaging, Inc. PAC731x Trust Webcam
Bus 001 Device 005: ID 413c:2107 Dell Computer Corp.

运动日志-n

[0] Processing thread 0 - config file /etc/motion/motion.conf
[0] Motion 3.2.12 Started
[0] ffmpeg LIBAVCODEC_BUILD 3482368 LIBAVFORMAT_BUILD 3478785
[0] Thread 1 is from /etc/motion/motion.conf
[0] httpd bind(): Address already in use
[0] httpd thread exit
[1] Thread 1 started
[1] cap.driver: "gspca_pac7302"
[1] cap.card: "USB Camera (093a:2621)"
[1] cap.bus_info: "usb-bcm2708_usb-1.2"
[1] cap.capabilities=0x85000001
[1] - VIDEO_CAPTURE
[1] - READWRITE
[1] - STREAMING
[1] Config palette index 8 (YU12) doesn't work.
[1] Supported palettes:
[1] 0: PJPG (PJPG)
[1] Unable to find a compatible palette format.
[1] ioctl (VIDIOCGCAP): Inappropriate ioctl for device
[1] Could not fetch initial image from camera
[1] Motion continues using width and height from config file(s)
[1] Resizing pre_capture buffer to 1 items
[1] bind(): Address already in use
[1] Problem enabling stream server in port 8081: Address already in use
[1] Thread exiting
[0] Motion thread 1 restart

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我尝试将宽度和高度更改为160*140、320*240640*480，但结果是相同的错误。。。。但找不到解决方案…

日志文件显示您的端口8081已在使用中。。。 还请确保您的输出路径已为用户motion启用写功能。motion: 如。 sudo chown motion.motion/home/pi/motion

尝试跑步：

LD_PRELOAD=/usr/lib/arm-linux-gnueabihf/libv4l/v4l1compat.so motion -n

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对我来说，这是配置文件的一个问题。我将分辨率设置为640x360，经过一点修改后，我发现高度必须可以被16整除。“端口已在使用”的原始错误消息是错误的，更改端口无法修复任何问题就是明证。在我调回480的高度后，服务又开始了

我建议使用320x240、640x480或1280x720（如果您有合适的网络摄像头和互联网速度）