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Ubuntu调用USB摄像头

news 来源：原创 2024/5/7 8:18:36

原文地址：Ubuntu调用USB摄像头 - 码农教程

时间:2019-01-13

本文章向大家介绍Ubuntu调用USB摄像头，主要包括Ubuntu调用USB摄像头使用实例、应用技巧、基本知识点总结和需要注意事项，具有一定的参考价值，需要的朋友可以参考一下。

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=256ms

T:  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=10ms

T:  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=1ms

T:  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