Difference between revisions of "Linbian Usage Guide"
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Revision as of 06:54, 26 October 2018
Contents
Terminal
On Linbian OS, the default terminal application is LXTerminal.
You can open it from Application Menu -> System Tools.
Camera Module
Webcams
Gstreamer
Camera source
- lindeniv4l2src: Video (video4linux2) Source
Use for CSI Camera
Example:
sudo gst-launch-1.0 lindeniv4l2src device=/dev/video1 ! video/x-raw,width=1920,height=1080,format=I420 ! videoconvert ! sunxifbsink video-memory=24
Omx hardware H.264 decoder and encoder
- omxh264dec: OpenMAX H.264 Video Decoder
Example:
sudo gst-launch-1.0 filesrc location=1c.mp4 ! qtdemux name=demux demux.video_0 ! queue ! h264parse ! omxh264dec ! videoconvert ! sunxifbsink
- omxh264videoenc: OpenMAX H.264 Video Encoder
Example:
sudo gst-launch-1.0 lindeniv4l2src device=/dev/video1 ! video/x-raw,width=1920,height=1080,format=I420 ! videoconvert ! omxh264videoenc target-bitrate=5000000 ! mpegtsmux ! filesink location=1.ts
Display sink
- sunxifbsink: Accelerated console framebuffer video sink for sunxi-based devices
Example:
sudo gst-launch-1.0 -v videotestsrc pattern=ball name=left ! sunxifbsink
Play Video
Play Audio
Python
GPIO
MPP
Allwinner official documents
- MPP Application Development Reference Manual, Chinese version.
- ISP Module User Guide, Chinese version, English version.
- EVE Application Development Reference Manual, Chinese version, English version.
- Human Counting Application Development Reference Manual, Chinese version
- Motion Detection Application Development Reference Manual, Chinese version
- Binocular depth of field (DOF) Application Development Reference Manual, Chinese version
Samples
Please refer to Demo programs.
Demo programs
Allwinner release a series of MPP samples. You can download from Github.
$ git clone https://github.com/lindenis-org/mpp_sample ~/mpp_sample
After downloading, You will get the following directory.
app/ Makefile.param README.md sample_adec/ sample_aenc/ sample_ai/ ......
app/ includes a set of MPP samples with a command line based menu. sample_xxx/ is a separate sample of the scene. Root privileges is required when run these sample. e.g.
$ sudo ./app/release/app_mpp_sample *************************************************************** 1 : vi+(venc+rtsp)+vo 2 : vi+(venc+rtsp) 3 : vi+vo 4 : vi+ise+(venc+rtsp)+vo 5 : [vi+venc+vo]+[ai+aenc+ao]+rtsp 6 : vi->yuv+venc+rtsp 7 : vi+venc+mux 8 : vi+(venc+mux)+vo 9 : demux+vdec+vo 10 : ai+aenc+mux+ao 11 : demux+adec+ao 12 : Quit *************************************************************** Please choice 1~12 num:
Face detection
Face detection based on EVE.
Location
sample_face_detect
Building
$ cd ~/mpp_sample/sample_face_detect $ make
Running
$ sudo ./sample_face_detect
The picture of face crop and store at ./pic directory when detected.
Motion detection
Motion detection based on CVE.
Location
sample_AILib/sample_vi2MOD
Building
$ cd ~/mpp_sample/sample_AILib/sample_vi2MOD $ make
Running
$ sudo ./sample_vi2MOD -path sample_vi2MOD.conf
The information of detected target was stored at ./DTCAResult.bin .
Human counting
VLPR
Image stitch
Camera module is in development.
