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OpenIPC Wiki

Table of Content

Majestic Streamer

Preamble

Majestic is a video streaming application, the heart of our firmware (in relation to camera/video surveillance functionality). Majestic is configurable via /etc/majestic.yaml file, and has many features/services enabled by default. Unneeded options can be switched off for better security and performance. See /etc/majestic.full for configuration options.

Control signals

-HUP restart Majestic (Except Ingenic T21).
-SIGUSR1 fast reload (Sigmastar only).
-SIGUSR2 SDK Shutdown (For all platforms).

Camera related URLs in firmware

Majestic supports multiple audio, video and still image formats, and more. You can find the full list of available endpoints on this page.

The long JPEG control parameter did not fit into the example on the site and we publish it here:

/image.jpg?width=640&height=360&qfactor=73&color2gray=1

Changing parameters via cli

At the moment it is possible to change parameters in the configuration file via the CLI utility.

This allows parameters to be changed with a single line in pseudo-dynamic mode on some platforms simply by forcing a re-read of the configuration file.

cli -s .video0.codec h264 ; cli -s .video0.fps 10 ; killall -HUP majestic

Experimental Control Features (not yet described in endpoints)

/metrics/isp
/metrics/venc
/metrics/motion

/night/ircut
/night/light

Auto day/night detection

If these variables are used, it is possible to replace the used sandbox scripts. Works only for simple day/night schemes with minimal configuration and in the absence of mentions of irSensorPin in the majestic.yaml configuration file. If the light sensor gpio is set, it will use the default mode.

The settings work like this: day < [minThreshold] | hysteresis | [maxThreshold] < night

If the sensor gain is 1024 on a bright day the minThreshold could be set to 2000, if the sensor gain is 32000 on a dark night the maxThreshold could be set to 10000.

cli -s .nightMode.minThreshold 10
cli -s .nightMode.maxThreshold 50

Motion detection

Motion detect is supported for Hisilion/Goke, Ingenic and Sigmastar. When a motion event is detected, majestic invokes a predefined script /usr/sbin/motion.sh with a parameter specifying the object count:

/usr/sbin/motion.sh [count]

Enable motion detection in majestic configuration:

cli -s .motionDetect.enabled true
cli -s .motionDetect.debug true

Enable external plugin system:

cli -s .system.plugins true

Reboot the camera and restart majestic in the foreground:

killall majestic; sleep 3; majestic

You should see the script running after motion detection events:

20:37:02  <SED_IVE_DETCTOR> [  motion] motion_update@155             Motion detected: [1163x0] -> [690x475]
20:37:02  <SED_IVE_DETCTOR> [   tools] motion_event@615              Execute motion script: /usr/sbin/motion.sh

Broadcasts using RTMP

To instantly launch a YouTube broadcast, run these commands in the console:

cli -s .video0.codec h264
cli -s .audio.enabled true
cli -s .outgoing.enabled true
cli -s .outgoing.server rtmp://a.rtmp.youtube.com/live2/you-key-here
reboot

Examples of other addresses for different services:

  • YouTube
    • rtmp://a.rtmp.youtube.com/live2/---KEY---
  • Telegram
    • rtmps://dc4-1.rtmp.t.me/s/---KEY---
  • RuTube
    • rtmp://upload.rutube.ru/live_push/---KEY---
  • OK and VK
    • rtmp://ovsu.mycdn.me/input/---KEY---

We ask that you add information about other popular services here, thank you.

ONVIF

For basic ONVIF to work correctly, you need to enable it and add a user to the system as shown in the example:

cli -s .onvif.enabled true
adduser viewer -s /bin/false -D -H
echo viewer:123456 | chpasswd

ROI

Detection zones of two types:

motionDetect.roi: 1854x1304x216x606,1586x1540x482x622

motionDetect.skipIn: 960x540x1920x1080

roi - region of interest, when we specify one or more regions whose movements we are interested in.

skipIn - on the contrary, if we are interested in movements on the whole screen, except for some areas (for example, there is a tree in the frame, which is swaying in the wind).

Coordinate format is the same as in osd.privacyMasks: x,y of the top left point, length and width in pixels.

How to convert YUV image to a more common image format

Use convert command from ImageMagick software. Run it like this:

convert -verbose -sampling-factor 4:2:0 -size 1920x1080 -depth 8 image.yuv image.png

where 1920x1080 is the picture resolution of video0, and .png is the target image format.

How to play audio stream

Use ffplay utility from ffmpeg package.

ffplay -ar 48000 -ac 1 -f s16le http://192.168.1.10/audio.pcm
ffplay -ar 48000 -ac 1 -f alaw http://192.168.1.10/audio.alaw
ffplay -ar 48000 -ac 1 -f mulaw http://192.168.1.10/audio.ulaw
ffplay -ar 8000 -ac 1 -f alaw http://192.168.1.10/audio.g711a

How to create an audio file to play on camera's speaker over network

Using sox program convert any source audio file to PCM 8kbps audio:

sox speech.mp3 -t raw -r 8000 -e signed -b 16 -c 1 test.pcm

How to play audio file on camera's speaker over network

cat test.pcm | curl -v -u user:password -H "Content-Type: application/json" -X POST --data-binary @- http://192.168.1.10/play_audio