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fuss:motion [2017/11/21 16:02]
office created
fuss:motion [2018/04/10 18:42] (current)
office
Line 1: Line 1:
 +====== Schedule Motion Movement Detection ======
  
 +The following script should be run every minute (placed in ''/​etc/​cron.d/​minutely''​) in order to start or stop detection depending on the current time. The script can be configured by changing the parameters in the ''​CONFIGURATION''​ section.
 +
 +<code bash>
 +#!/bin/sh
 +###########################################################################​
 +##  Copyright (C) Wizardry and Steamworks 2017 - License: GNU GPLv3      ##
 +##  Please see: http://​www.gnu.org/​licenses/​gpl.html for legal details, ​ ##
 +##  rights of fair usage, the disclaimer and warranty conditions. ​       ##
 +###########################################################################​
 +## The script uses motion to start and stop motion detection such that   ##
 +## the camera will start recording only within the given time intervals. ##
 +##                                                                       ##
 +## To use the script, drop into /​etc/​cron.minutely such that the script ​ ##
 +## will be called every minute by crontab and pause or start detection. ​ ##
 +###########################################################################​
 +
 +###########################################################################​
 +##                            CONFIGURATION ​                             ##
 +###########################################################################​
 +
 +# The detection URL to the motion webserver.
 +MOTION_URL_DETECTION=http://​localhost:​8085/​0/​detection
 +
 +# The start time after which recording should start (HHmm)
 +START_TIME=0705
 +
 +# The end time after which recording should stop (HHmm)
 +PAUSE_TIME=1700
 +
 +###########################################################################​
 +##                              INTERNALS ​                               ##
 +###########################################################################​
 +
 +# Get the current recording status.
 +DETECTION_STATUS=`curl -s $MOTION_URL_DETECTION"/​status"​ 2>/​dev/​null | grep -Po '​(?<​=Detection status )(.+)'​`
 +
 +# Get the current time.
 +CURRENT_TIME=`date +%H%M`
 +
 +# Whether the current time falls between the defined start and stop times.
 +test `[ $CURRENT_TIME -ge $START_TIME ] && [ $CURRENT_TIME -le $PAUSE_TIME ]`
 +case $? in
 +    0)
 +        case $DETECTION_STATUS in
 +            PAUSE)
 +                logger "Start recording..."​
 +                # Instruct the camera to start detection and recording.
 +                curl -s $MOTION_URL_DETECTION"/​start"​ >/​dev/​null
 +            ;;
 +        esac
 +        ;;
 +    *)
 +        case $DETECTION_STATUS in
 +            ACTIVE)
 +                logger "Stop recording..."​
 +                # Instruct the camera to start detection and recording.
 +                curl -s $MOTION_URL_DETECTION"/​pause"​ >/​dev/​null
 +            ;;
 +        esac
 +        ;;
 +esac
 +
 +</​code>​
 +
 +====== Reduce CPU Usage ======
 +
 +Motion can be very CPU intensive when capturing streams such that the following tips can be used as a guide to lowering the CPU usage considerably:​
 +
 +  * Determine the exact width, height and framerate that the camera is capable of, select the lowest resolution that the camera offers and change ''​width'',​ ''​height''​ and ''​framerate''​ in ''/​etc/​motion.conf''​ to match the exact values. The benefit from setting exact values is that Motion will not spend time resizing or rescaling movies. The default values in ''/​etc/​motion.conf''​ rarely apply to whatever camera Motion may be capturing from. . .
 +  * Edit ''/​etc/​motion.conf''​ and change the ffmpeg video codec to ''​mp4:​h264_omx'':​
 +<​code>​
 +ffmpeg_video_codec mp4:​h264_omx
 +</​code>​
 +
 +in order to benefit from hardware accelerated video capturing. This option alone should lower the CPU consumption considerably and the hardware acceleration is now present on Raspberry Pi 2 and 3.

fuss/motion.txt ยท Last modified: 2018/04/10 18:42 by office

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