FreeBSD Webcam:传送门

1 查看摄像头USB驱动

ls /dev/v*

Result

/dev/vcs   /dev/vcs4  /dev/vcsa1  /dev/vcsa5        /dev/vhost-net
/dev/vcs1  /dev/vcs5  /dev/vcsa2  /dev/vcsa6        /dev/vhost-vsock
/dev/vcs2  /dev/vcs6  /dev/vcsa3  /dev/vga_arbiter  /dev/video0
/dev/vcs3  /dev/vcsa  /dev/vcsa4  /dev/vhci
/dev/v4l:
by-id  by-path
/dev/vfio:
vfio

Analysis
输入命令后,出现的结果里含有/dev/video0说明USB摄像头驱动安装成功,Ubuntu18.0以自动安装了USB摄像头驱动.

/dev/video0

2 查看USB信息

2.1 摄像头ID

lsusb

Result

Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 0ac8:3420 Z-Star Microelectronics Corp. Venus USB2.0 Camera
Bus 001 Device 002: ID 17ef:6019 Lenovo
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Analysis
由第二行信息Device 003:ID 3240可知摄像头ID为3240.

2.2 查看设备名称

cd /dev
dmesg | grep video

Result

[   22.137377] Linux video capture interface: v2.00
[   27.358749] uvcvideo: Found UVC 1.00 device A4tech USB2.0 Camera (0ac8:3420)
[   27.360265] uvcvideo 1-5:1.0: Entity type for entity Processing 2 was not initialized!
[   27.360267] uvcvideo 1-5:1.0: Entity type for entity Camera 1 was not initialized!
[   27.360268] uvcvideo 1-5:1.0: Entity type for entity Extension 4 was not initialized!
[   27.360442] usbcore: registered new interface driver uvcvideo

Analysis
第二行信息Found UVC,可知摄像头使用UVC协议.

2.3 查看摄像头协议

cd /dev
sudo cat /sys/kernel/debug/usb/devices

Result

T:  Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=480  MxCh=12
B:  Alloc=  0/800 us ( 0%), #Int=  0, #Iso=  0
D:  Ver= 2.00 Cls=09(hub  ) Sub=00 Prot=01 MxPS=64 #Cfgs=  1
P:  Vendor=1d6b ProdID=0002 Rev= 4.15
S:  Manufacturer=Linux 4.15.0-43-generic xhci-hcd
S:  Product=xHCI Host Controller
S:  SerialNumber=0000:00:14.0
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=  0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   4 Ivl=256msT:  Bus=01 Lev=01 Prnt=01 Port=03 Cnt=01 Dev#=  2 Spd=1.5  MxCh= 0
D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
P:  Vendor=17ef ProdID=6019 Rev= 1.00
S:  Manufacturer=PixArt
S:  Product=Lenovo USB Optical Mouse
C:* #Ifs= 1 Cfg#= 1 Atr=a0 MxPwr=100mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=03(HID  ) Sub=01 Prot=02 Driver=usbhid
E:  Ad=81(I) Atr=03(Int.) MxPS=   8 Ivl=10msT:  Bus=01 Lev=01 Prnt=01 Port=04 Cnt=02 Dev#=  3 Spd=480  MxCh= 0
D:  Ver= 2.00 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs=  1
P:  Vendor=0ac8 ProdID=3420 Rev= 1.fa
S:  Manufacturer=Vimicro Corp.
S:  Product=A4tech USB2.0 Camera
C:* #Ifs= 4 Cfg#= 1 Atr=80 MxPwr=320mA
A:  FirstIf#= 0 IfCount= 2 Cls=0e(video) Sub=03 Prot=00
A:  FirstIf#= 2 IfCount= 2 Cls=01(audio) Sub=02 Prot=00
I:* If#= 0 Alt= 0 #EPs= 1 Cls=0e(video) Sub=01 Prot=00 Driver=uvcvideo
E:  Ad=81(I) Atr=03(Int.) MxPS=  10 Ivl=2ms
I:* If#= 1 Alt= 0 #EPs= 0 Cls=0e(video) Sub=02 Prot=00 Driver=uvcvideo
I:  If#= 1 Alt= 1 #EPs= 1 Cls=0e(video) Sub=02 Prot=00 Driver=uvcvideo
E:  Ad=82(I) Atr=05(Isoc) MxPS= 128 Ivl=125us
I:  If#= 1 Alt= 2 #EPs= 1 Cls=0e(video) Sub=02 Prot=00 Driver=uvcvideo
E:  Ad=82(I) Atr=05(Isoc) MxPS= 512 Ivl=125us
I:  If#= 1 Alt= 3 #EPs= 1 Cls=0e(video) Sub=02 Prot=00 Driver=uvcvideo
E:  Ad=82(I) Atr=05(Isoc) MxPS=1024 Ivl=125us
I:  If#= 1 Alt= 4 #EPs= 1 Cls=0e(video) Sub=02 Prot=00 Driver=uvcvideo
E:  Ad=82(I) Atr=05(Isoc) MxPS=1536 Ivl=125us
I:  If#= 1 Alt= 5 #EPs= 1 Cls=0e(video) Sub=02 Prot=00 Driver=uvcvideo
E:  Ad=82(I) Atr=05(Isoc) MxPS=2048 Ivl=125us
I:  If#= 1 Alt= 6 #EPs= 1 Cls=0e(video) Sub=02 Prot=00 Driver=uvcvideo
E:  Ad=82(I) Atr=05(Isoc) MxPS=2688 Ivl=125us
I:  If#= 1 Alt= 7 #EPs= 1 Cls=0e(video) Sub=02 Prot=00 Driver=uvcvideo
E:  Ad=82(I) Atr=05(Isoc) MxPS=3072 Ivl=125us
I:* If#= 2 Alt= 0 #EPs= 0 Cls=01(audio) Sub=01 Prot=00 Driver=snd-usb-audio
I:* If#= 3 Alt= 0 #EPs= 0 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
I:  If#= 3 Alt= 1 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
E:  Ad=83(I) Atr=01(Isoc) MxPS=  98 Ivl=1msT:  Bus=02 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=5000 MxCh= 6
B:  Alloc=  0/800 us ( 0%), #Int=  0, #Iso=  0
D:  Ver= 3.00 Cls=09(hub  ) Sub=00 Prot=03 MxPS= 9 #Cfgs=  1
P:  Vendor=1d6b ProdID=0003 Rev= 4.15
S:  Manufacturer=Linux 4.15.0-43-generic xhci-hcd
S:  Product=xHCI Host Controller
S:  SerialNumber=0000:00:14.0
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=  0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   4 Ivl=256ms

Analysis
由信息P: Vendor=0ac8 ProdID=3420 Rev= 1.fa知此信息(ProdID=3240)为摄像头信息.

3 捕捉视频

3.1 camorama软件

安装

sudo apt-get install camorama

启动

camorama

camorama界面:

图3.1 Camorama视频捕捉软件

3.2 cheese视频捕捉软件

安装

sudo apt-get install cheese

启动

cheese

Cheese软件界面:

图3.2 Cheese视频捕捉软件 # 4 总结 - Ubuntu使用USB摄像头,需安装USB驱动; - 注意查看摄像头使用的协议;

[参考文献]
[1]https://blog.csdn.net/hktkfly6/article/details/80613980
[2]https://blog.csdn.net/carina_cao/article/details/80801452

Ubuntu调用USB摄像头相关推荐

linux下uvc协议访问usb摄像头,Ubuntu调用USB摄像头
FreeBSD Webcam:传送门 1 查看摄像头USB驱动 CMD ls /dev/v* Result /dev/vcs /dev/vcs4 /dev/vcsa1 /dev/vcsa5 /dev/ ...
ubuntu上python使用opencv调用usb摄像头无故掉线以后重连摄像头。
项目中使用opencv调用usb摄像头,运行过程中,会出现摄像头掉线的情况.猜测掉线原因是硬件相关,可能是摄像头,也可能是usb线和端口. 这里主要介绍两种掉线情况以及代码重连摄像头的方式. 1.第一 ...
讯为iTOP4412开发板ARM-linux 使用OPENCV调用USB摄像头
讯为iTOP4412开发板ARM-linux 使用OPENCV调用USB摄像头首先要在内核里面确定有添加USB摄像头的驱动,这个在讯为官方文档里面有所以就不展开讲了. 主要问题是如何让opencv能 ...
五十、opencv调用USB摄像头并保存图片
@Author: Runsen opencv OpenCV是计算机视觉的一个模块. OpenCV可以通过图像处理减少图像噪声,调整图像亮度.颜色或者对比度等等.想要进一步系统了解OpenCV图像处理基 ...
AndroidUSBCamera调用USB摄像头问题
UVC_ERROR_INVALID_DEVICE not open camera:err=-50 由于客户需求,笔者最近在测试大型android平板设备,但是所使用的厂商提供的设备并未继承前后置摄像头 ...
C#调用usb摄像头的实现方法
1.下载aforge类库,下载地址:,我下载的版本是:aforge.net framework-2.2.5.exe: 2.下载安装好后,将下载类库中的release文件夹复制到c#项目的可执行文件文件 ...
C++中调用usb摄像头并保存图片【学习记录第1篇】
[学习记录第1篇]C++中通过OPENCV调用usb摄像头并保存图片准备外置USB摄像头代码外置USB摄像头运行结果外置USB超声波探头代码外置USB超声波探头运行结果第一篇博客的感想准 ...
C# 调用USB摄像头
目录 C#调用USB摄像头使用AForge类库进行开发 1.AForge安装 2.下载完毕后进行USB摄像头类封装 C#调用USB摄像头使用AForge类库进行开发 1.AForge安装右击工程,在 ...
Jetson NX YOLOV目标检测学习笔记1----CV调用USB摄像头
1.相关的包安装(安装步骤自行百度) python 版本3.6.9 pip3 install opencv-python=='xxxx' 其中xxx为对应版本号(注意:opencv我用到的版本是ope ...

Ubuntu调用USB摄像头