Difference between revisions of "Template:FriendlyCoreAllwinner-DVPCam"
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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> | ||
| + | WARNNING: only works with Linux-3.4 at this moment.<br> | ||
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": | 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": | ||
<syntaxhighlight lang="bash"> | <syntaxhighlight lang="bash"> | ||
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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> | ||
| − | The mjpg-streamer utility uses libjpeg to software-encode steam data. The Linux-4.x based ROM currently doesn't support hardware-encoding. If you use a Linux-3.x based ROM | + | The mjpg-streamer utility uses libjpeg to software-encode steam data. <!--The Linux-4.x based ROM currently doesn't support hardware-encoding. If you use a Linux-3.x 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: |
<syntaxhighlight lang="bash"> | <syntaxhighlight lang="bash"> | ||
$ ffmpeg -t 30 -f v4l2 -channel 0 -video_size 1280x720 -i /dev/video0 -pix_fmt nv12 -r 30 \ | $ ffmpeg -t 30 -f v4l2 -channel 0 -video_size 1280x720 -i /dev/video0 -pix_fmt nv12 -r 30 \ | ||
Revision as of 05:47, 11 June 2018
The CAM500B camera module is a 5M-pixel camera with DVP interface. For more tech details about it you can refer to Matrix - CAM500B.
WARNNING: only works with Linux-3.4 at this moment.
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":
$ cd /root/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: 4.16.0 ...
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:
$ ./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
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:
The mjpg-streamer utility uses libjpeg to software-encode steam data. 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.
