Mjpg-streamer
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目录
查看摄像头数据
列出所有摄像头设备
[root@imx6ull:~]# v4l2-ctl --list-devices
pxp (pxp_v4l2):
/dev/video0
USB 2.0 Camera (usb-ci_hdrc.1-1.3):
/dev/video1
查看摄像头详细信息
[root@imx6ull:~]# v4l2-ctl -L -d /dev/video1
brightness 0x00980900 (int) : min=-255 max=255 step=1 default=0 value=0
contrast 0x00980901 (int) : min=0 max=30 step=1 default=15 value=15
saturation 0x00980902 (int) : min=0 max=127 step=1 default=30 value=30
hue 0x00980903 (int) : min=-16000 max=16000 step=100 default=0 value=0
white_balance_temperature_auto 0x0098090c (bool) : default=1 value=1
gamma 0x00980910 (int) : min=20 max=250 step=1 default=98 value=98
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=7000 step=1 default=5000 value=5000 flags=inactive
sharpness 0x0098091b (int) : min=0 max=15 step=1 default=2 value=2
backlight_compensation 0x0098091c (int) : min=0 max=2 step=1 default=1 value=1
查看摄像头支持的像素格式和分辨率
[root@imx6ull:~]# v4l2-ctl --list-formats-ext -d /dev/video1
ioctl: VIDIOC_ENUM_FMT
Type: Video Capture
[0]: 'YUYV' (YUYV 4:2:2)
Size: Discrete 640x480
Interval: Discrete 0.033s (30.000 fps)
Interval: Discrete 0.040s (25.000 fps)
Interval: Discrete 0.050s (20.000 fps)
Interval: Discrete 0.067s (15.000 fps)
Interval: Discrete 0.100s (10.000 fps)
Interval: Discrete 0.200s (5.000 fps)
Size: Discrete 160x120
Interval: Discrete 0.033s (30.000 fps)
Interval: Discrete 0.040s (25.000 fps)
Interval: Discrete 0.050s (20.000 fps)
Interval: Discrete 0.067s (15.000 fps)
Interval: Discrete 0.100s (10.000 fps)
Interval: Discrete 0.200s (5.000 fps)
Size: Discrete 320x240
Interval: Discrete 0.033s (30.000 fps)
Interval: Discrete 0.040s (25.000 fps)
Interval: Discrete 0.050s (20.000 fps)
Interval: Discrete 0.067s (15.000 fps)
Interval: Discrete 0.100s (10.000 fps)
Interval: Discrete 0.200s (5.000 fps)
Size: Discrete 352x288
Interval: Discrete 0.033s (30.000 fps)
Interval: Discrete 0.040s (25.000 fps)
Interval: Discrete 0.050s (20.000 fps)
Interval: Discrete 0.067s (15.000 fps)
Interval: Discrete 0.100s (10.000 fps)
Interval: Discrete 0.200s (5.000 fps)
Size: Discrete 800x600
Interval: Discrete 0.067s (15.000 fps)
Interval: Discrete 0.100s (10.000 fps)
Interval: Discrete 0.200s (5.000 fps)
Size: Discrete 1280x720
Interval: Discrete 0.067s (15.000 fps)
Interval: Discrete 0.100s (10.000 fps)
Interval: Discrete 0.200s (5.000 fps)
Size: Discrete 1280x1024
Interval: Discrete 0.083s (12.000 fps)
Interval: Discrete 0.100s (10.000 fps)
Interval: Discrete 0.200s (5.000 fps)
Size: Discrete 1600x1200
Interval: Discrete 0.111s (9.000 fps)
Interval: Discrete 0.200s (5.000 fps)
[1]: 'MJPG' (Motion-JPEG, compressed)
Size: Discrete 640x480
Interval: Discrete 0.033s (30.000 fps)
Interval: Discrete 0.040s (25.000 fps)
Interval: Discrete 0.050s (20.000 fps)
Interval: Discrete 0.067s (15.000 fps)
Interval: Discrete 0.100s (10.000 fps)
Interval: Discrete 0.200s (5.000 fps)
Size: Discrete 160x120
Interval: Discrete 0.033s (30.000 fps)
Interval: Discrete 0.040s (25.000 fps)
Interval: Discrete 0.050s (20.000 fps)
Interval: Discrete 0.067s (15.000 fps)
Interval: Discrete 0.100s (10.000 fps)
Interval: Discrete 0.200s (5.000 fps)
Size: Discrete 320x240
Interval: Discrete 0.033s (30.000 fps)
Interval: Discrete 0.040s (25.000 fps)
Interval: Discrete 0.050s (20.000 fps)
Interval: Discrete 0.067s (15.000 fps)
Interval: Discrete 0.100s (10.000 fps)
Interval: Discrete 0.200s (5.000 fps)
Size: Discrete 352x288
Interval: Discrete 0.033s (30.000 fps)
Interval: Discrete 0.040s (25.000 fps)
Interval: Discrete 0.050s (20.000 fps)
Interval: Discrete 0.067s (15.000 fps)
Interval: Discrete 0.100s (10.000 fps)
Interval: Discrete 0.200s (5.000 fps)
Size: Discrete 800x600
Interval: Discrete 0.033s (30.000 fps)
Interval: Discrete 0.040s (25.000 fps)
Interval: Discrete 0.050s (20.000 fps)
Interval: Discrete 0.067s (15.000 fps)
Interval: Discrete 0.100s (10.000 fps)
Interval: Discrete 0.200s (5.000 fps)
Size: Discrete 1280x720
Interval: Discrete 0.033s (30.000 fps)
Interval: Discrete 0.040s (25.000 fps)
Interval: Discrete 0.050s (20.000 fps)
Interval: Discrete 0.067s (15.000 fps)
Interval: Discrete 0.100s (10.000 fps)
Interval: Discrete 0.200s (5.000 fps)
Size: Discrete 1280x1024
Interval: Discrete 0.033s (30.000 fps)
Interval: Discrete 0.040s (25.000 fps)
Interval: Discrete 0.050s (20.000 fps)
Interval: Discrete 0.067s (15.000 fps)
Interval: Discrete 0.100s (10.000 fps)
Interval: Discrete 0.200s (5.000 fps)
使用mjpg_streamer预览摄像头数据
查看开发板IP地址
[root@imx6ull:~]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:01:3F:2D:3E:4D
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
eth1 Link encap:Ethernet HWaddr 00:01:1F:2D:3E:4D
inet addr:192.168.1.21 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fdfd:3597:aa7a:0:201:1fff:fe2d:3e4d/64 Scope:Global
inet6 addr: fe80::201:1fff:fe2d:3e4d/64 Scope:Link
inet6 addr: fdfd:3597:aa7a::914/64 Scope:Global
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:558 errors:0 dropped:0 overruns:0 frame:0
TX packets:291 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:221870 (216.6 KiB) TX bytes:29419 (28.7 KiB)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:7756 errors:0 dropped:0 overruns:0 frame:0
TX packets:7756 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1
RX bytes:468263 (457.2 KiB) TX bytes:468263 (457.2 KiB)
mjpg_streamer参数讲解
- 使用mjpg_streamer -h 查看帮助信息。
[root@imx6ull:~]# mjpg_streamer -h
-----------------------------------------------------------------------
Usage: mjpg_streamer
-i | --input "<input-plugin.so> [parameters]"
-o | --output "<output-plugin.so> [parameters]"
[-h | --help ]........: display this help
[-v | --version ].....: display version information
[-b | --background]...: fork to the background, daemon mode
-----------------------------------------------------------------------
Example #1:
To open an UVC webcam "/dev/video1" and stream it via HTTP:
mjpg_streamer -i "input_uvc.so -d /dev/video1" -o "output_http.so"
-----------------------------------------------------------------------
Example #2:
To open an UVC webcam and stream via HTTP port 8090:
mjpg_streamer -i "input_uvc.so" -o "output_http.so -p 8090"
-----------------------------------------------------------------------
Example #3:
To get help for a certain input plugin:
mjpg_streamer -i "input_uvc.so --help"
-----------------------------------------------------------------------
In case the modules (=plugins) can not be found:
* Set the default search path for the modules with:
export LD_LIBRARY_PATH=/path/to/plugins,
* or put the plugins into the "/lib/" or "/usr/lib" folder,
* or instead of just providing the plugin file name, use a complete
path and filename:
mjpg_streamer -i "/path/to/modules/input_uvc.so"
-----------------------------------------------------------------------
- 得知mjpg_streamer后需要接-i和-o两个参数，再分别看这两个参数提供的不同so插件文件支持哪些选项。
- 可选的-h查询帮助信息、-v查询版本信息、-b后台执行就不多介绍了。
- 输入so插件包含：input_uvc.so、input_testpicture.so、(input_file.so、input_ptp2.so、input_http.so)
- 输出so插件包含：output_http.so、(output_file.so、output_udp.so、output_rtsp.so、output_viewer.so)
- 其中括号部分，我这个Buildroot的mjpg_streamer版本没有提供。
执行mjpg_streamer获取摄像头数据
- 如下所示我们使用-i参数指定输入so插件类型为uvc类型，-d参数指定使用的摄像头设备为/dev/video1 ，-r参数指定输入分辨率为640x480 ，-q参数指定uvc数据质量为90，-n参数说明不要初始化Linux-UVC驱动程序的dynctrls，-o参数指定输出类型为http方式，-w指定网站目录为/usr/camera/web
mjpg_streamer -i "/usr/lib/mjpg-streamer/input_uvc.so -d /dev/video1 -r 640x480 -f 30 -q 90 -n" -o "/usr/lib/mjpg-streamer/output_http.so -w /usr/share/mjpg-streamer/www/"
浏览器打开并查看摄像头数据
- 如上所示我们的开发板IP地址为
192.168.1.21,让后我们使用电脑浏览器打开如下地址即可预览摄像头数据。
192.168.1.21:8080
