Difference between revisions of "Template:FriendlyCoreAllwinner-DVPCam"

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(updated by API)
 
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For H3 based boards the CAM500B can work with both Linux-3.4 Kernel and Linux-4.14 Kernel.<br>
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{{#switch: {{{1}}}
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For H5 based boards the CAM500B can work with Linux-4.14 Kernel.<br>
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| NanoPi-M1|NanoPi-M1-Plus|NanoPi-NEO-Air =
 +
For {{{1}}} the CAM500B can work with both Linux-3.4 Kernel and Linux-4.14 Kernel.<br>
 
The CAM500B camera module is a 5M-pixel camera with DVP interface. For more tech details about it you can refer to [[Matrix - CAM500B]].<br>
 
The CAM500B camera module is a 5M-pixel camera with DVP interface. For more tech details about it you can refer to [[Matrix - CAM500B]].<br>
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connect your H3 board to a CAM500B. Then boot OS, connect your board to a network, log into the board as root and run "mjpg-streamer":
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| NanoPi-K1-Plus =
 +
For {{{1}}} the CAM500B can work with Linux-4.14 Kernel.<br>
 +
The CAM500B camera module is a 5M-pixel camera with DVP interface. For more tech details about it you can refer to [[Matrix - CAM500B]].<br>
 +
| NanoPi-Duo2 =
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For {{{1}}} the OV5640 can work with Linux-4.14 Kernel.<br>
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The NanoPi-Duo2 has support for OV5640 cameras and you can directly connect an OV5640 camera to the board. Here is a hardware setup:<br>
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[[File:duo2-ov5640.png|frameless|500px|duo2-ov5640]] <br>
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}}
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connect your board to camera module. Then boot OS, connect your board to a network, log into the board as root and run "mjpg-streamer":
 
<syntaxhighlight lang="bash">
 
<syntaxhighlight lang="bash">
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$ cd /root/mjpg-streamer
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$ cd /root/C/mjpg-streamer
 
$ make
 
$ make
 
$ ./start.sh
 
$ ./start.sh
Line 19: Line 29:
 
...
 
...
 
</syntaxhighlight>
 
</syntaxhighlight>
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The above messages indicate that "/dev/video0" is CAM500B's device node.The mjpg-streamer application is an open source video steam server. After it is successfully started the following messages will be popped up:
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The above messages indicate that "/dev/video0" is camera's device node.The mjpg-streamer application is an open source video steam server. After it is successfully started the following messages will be popped up:
 
<syntaxhighlight lang="bash">  
 
<syntaxhighlight lang="bash">  
 
$ ./start.sh
 
$ ./start.sh
Line 33: Line 43:
 
</syntaxhighlight>
 
</syntaxhighlight>
  
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start.sh runs the following two commands:
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<syntaxhighlight lang="bash">
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export LD_LIBRARY_PATH="$(pwd)"
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./mjpg_streamer -i "./input_uvc.so -d /dev/video0 -y 1 -r 1280x720 -f 30 -q 90 -n -fb 0" -o "./output_http.so -w ./www"
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</syntaxhighlight>
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Here are some details for mjpg_streamer's major options:<br>
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-i: input device. For example "input_uvc.so" means it takes input from a camera;<br>
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-o: output device. For example "output_http.so" means the it transmits data via http;<br>
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-d: input device's subparameter. It defines a camera's device node;<br>
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-y: input device's subparameter. It defines a camera's data format: 1:yuyv, 2:yvyu, 3:uyvy 4:vyuy. If this option isn't defined MJPEG will be set as the data format;<br>
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-r: input device's subparameter. It defines a camera's resolution;<br>
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-f: input device's subparameter. It defines a camera's fps. But whether this fps is supported depends on its driver;<br>
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-q: input device's subparameter. It defines the quality of an image generated by libjpeg soft-encoding;<br>
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-n: input device's subparameter. It disables the dynctrls function;<br>
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-fb: input device's subparameter. It specifies whether an input image is displayed at "/dev/fbX";<br>
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-w: output device's subparameter. It defines a directory to hold web pages;<br><br>
 
In our case the board's IP address was 192.168.1.230. We typed 192.168.1.230:8080 in a browser and were able to view the images taken from the camera's. Here is what you would expect to observe:<br>
 
In our case the board's IP address was 192.168.1.230. We typed 192.168.1.230:8080 in a browser and were able to view the images taken from the camera's. Here is what you would expect to observe:<br>
 
[[File:mjpg-streamer-cam500a.png|frameless|400px|mjpg-streamer-cam500a]] <br>
 
[[File:mjpg-streamer-cam500a.png|frameless|400px|mjpg-streamer-cam500a]] <br>

Latest revision as of 05:27, 14 January 2019


connect your board to camera module. Then boot OS, connect your board to a network, log into the board as root and run "mjpg-streamer": 

$ cd /root/C/mjpg-streamer
$ make
$ ./start.sh

You need to change the start.sh script and make sure it uses a correct /dev/videoX node. You can check your camera's node by running the following commands: 

$ apt-get install v4l-utils
$ v4l2-ctl -d /dev/video0 -D
Driver Info (not using libv4l2):
        Driver name   : sun6i-video
        Card type     : sun6i-csi
        Bus info      : platform:camera
        Driver version: 4.14.0
	...

The above messages indicate that "/dev/video0" is camera's device node.The mjpg-streamer application is an open source video steam server. After it is successfully started the following messages will be popped up: 

 
$ ./start.sh
 i: Using V4L2 device.: /dev/video0
 i: Desired Resolution: 1280 x 720
 i: Frames Per Second.: 30
 i: Format............: YUV
 i: JPEG Quality......: 90
 o: www-folder-path...: ./www/
 o: HTTP TCP port.....: 8080
 o: username:password.: disabled
 o: commands..........: enabled

start.sh runs the following two commands: 

export LD_LIBRARY_PATH="$(pwd)"
./mjpg_streamer -i "./input_uvc.so -d /dev/video0 -y 1 -r 1280x720 -f 30 -q 90 -n -fb 0" -o "./output_http.so -w ./www"

Here are some details for mjpg_streamer's major options:
-i: input device. For example "input_uvc.so" means it takes input from a camera;
-o: output device. For example "output_http.so" means the it transmits data via http;
-d: input device's subparameter. It defines a camera's device node;
-y: input device's subparameter. It defines a camera's data format: 1:yuyv, 2:yvyu, 3:uyvy 4:vyuy. If this option isn't defined MJPEG will be set as the data format;
-r: input device's subparameter. It defines a camera's resolution;
-f: input device's subparameter. It defines a camera's fps. But whether this fps is supported depends on its driver;
-q: input device's subparameter. It defines the quality of an image generated by libjpeg soft-encoding;
-n: input device's subparameter. It disables the dynctrls function;
-fb: input device's subparameter. It specifies whether an input image is displayed at "/dev/fbX";
-w: output device's subparameter. It defines a directory to hold web pages;

In our case the board's IP address was 192.168.1.230. We typed 192.168.1.230:8080 in a browser and were able to view the images taken from the camera's. Here is what you would expect to observe:
mjpg-streamer-cam500a
The mjpg-streamer utility uses libjpeg to software-encode steam data. The Linux-4.14 based ROM currently doesn't support hardware-encoding. If you use a H3 boards with Linux-3.4 based ROM you can use the ffmpeg utility to hardware-encode stream data and this can greatly release CPU's resources and speed up encoding: 

$ ffmpeg -t 30 -f v4l2 -channel 0 -video_size 1280x720 -i /dev/video0 -pix_fmt nv12 -r 30 \
        -b:v 64k -c:v cedrus264 test.mp4

By default it records a 30-second video. Typing "q" stops video recording. After recording is stopped a test.mp4 file will be generated.

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