2687b938a0
Video clips recorded from the camera are no longer append, instead the clips are kept as is and then linked together in a playlist file in the output_dir. this makes it much more efficient and easier to maintain code. Also discovered that ffmpeg have a tendency to stall mid execution of recording from the rtsp stream every now and then. added a work around in the form of calling ffmpeg via the timeout command instead of directly so it will force kill ffmpeg if it goes longer than the expected BUF_SZ. Increased BUF_SZ to 10 secs. Added a clause in the recording loop that will make it write out a second clip if motion was detected.
4.2 KiB
4.2 KiB
Motion Watch
Motion Watch is a video surveillance application that monitors the video feeds of an IP camera and records only footage that contains motion. The main advantage of this is reduced storage requirements as opposed to continuous recording because only video footage of interest is recorded to storage. The entire app is designed to operate on just one camera but multiple instances of this app can be used to operate multiple cameras.
Usage
Usage: mow <argument>
-h : display usage information about this application.
-c : path to the config file.
Config File
The config file is a simple text file that contain parameters that dictate the behavior of the application. Below is an example of a config file with all parameters supported and descriptions of each parameter.
# Motion Watch config file v1.2
#
# note all lines in this config file that starts with a '#' are ignored.
# also note to avoid using empty lines. if you're going to need an empty
# line, start it with a '#'
#
recording_stream = rtsp://1.2.3.4:554/h264
# this is the url to the main stream of the IP camera that will be used
# to record footage.
#
output_dir = /path/to/footage/directory
# this is the output directory that will be used to store recorded footage
# from the camera. the file naming convention uses the current date for
# playlist files which points to hidden video clips taken from the camera.
#
buff_dir = /tmp/ramdisk/cam_name
# this application records small clips of the footage from the camera and
# then stores them into this directory. any clips with motion detected in
# them are moved to output_dir, if no motion they are deleted. highly
# recommend to use a ramdisk tempfs for this since this directory is used
# for lots of writes.
#
color_threshold = 8
# the color levels in each pixel of the camera stream can range from 0-255.
# in an ideal world the color differences in between frames should be 0 if
# there is no motion but must cameras can't do this. the threshold value
# here is used to filter if the pixels are truly different.
#
block_threshold = 3456
# this application detects motion by loading frames from the camera and
# then compare the pixels of each back to back frame for any significant
# differences between the pixels based on color_threshold. it loads the
# pixels of each frame in blocks. the size of the blocks are adjustable
# below. it counts how many pixels are different in the block and this is
# used to tell if the footage has motion if the different pixel count
# exceeds it.
#
block_x = 64
# this is the x coordinate size or horizontal size of a block of pixels
# that the application will use to detect the presents of motion.
#
block_y = 60
# this is the y coordinate size or vertical size of a block of pixels
# that the application will use to detect the presents of motion.
#
duration = 60
# this sets the internal timer used to reset to the detection loop and
# then call post_cmd if it is defined. note: this time is extended if
# motion was detected. this will also reload the config file so changes
# to the settings will be applied without restarting the application.
#
post_cmd = move_the_ptz_camera.py
# this an optional command to run after the internal timer duration has
# elapsed. one great use for this is to move a ptz camera to the next
# position of it's patrol pattern. note: the call to this command can be
# delayed if motion was detected.
#
max_days = 15
# this defines the maximum amount of days worth of video clips that is
# allowed to be stored in the output_dir. whenever this limit is met,
# the oldest day is deleted.
#
vid_container = mp4
# this is the video file format to use from recording footage from the
# camera. the format support depends entirely on the under laying ffmpeg
# installation.
Build Setup
This application is currently only compatible with a Linux based operating systems that are capable of building and installing the opencv API from source.
cd /path/to/Motion/Watch/source
mkdir ./build
cd ./build
cmake ..
make
sudo cp ./mow /usr/bin/mow