Videoreg: script for continuous video recording from the plugged webcams
Prerequisites: you will need to install the required libraries
RabbitMQ and Ruby are required to use this script.
sudo echo "deb http://www.rabbitmq.com/debian/ testing main" >> /etc/apt/sources.list
sudo wget http://www.rabbitmq.com/rabbitmq-signing-key-public.asc
sudo apt-key add rabbitmq-signing-key-public.asc
sudo apt-get update
sudo apt-get install -y mencoder ffmpeg qc-usb-utils v4l-utils rabbitmq-server ruby1.9.1 rubygems ruby1.9.1-dev
sudo gem install videoreg
Then write the configuration file according to your setup (give it a name "config.rb", for example)
reg {
device '/dev/webcam0'
resolution '640x480'
fps 25
duration 60
filename '#{time}-webcam0.avi'
storage '/tmp/webcam0'
lockfile '/tmp/videoreg.webcam0.lock'
store_max 5
}
reg {
device '/dev/webcam1'
resolution '640x480'
fps 25
duration 60
filename '#{time}-webcam1.avi'
storage '/tmp/webcam1'
lockfile '/tmp/videoreg.webcam1.lock'
store_max 3
}
reg {
device '/dev/webcam2'
resolution '640x480'
fps 25
duration 60
filename '#{time}-webcam2.avi'
storage '/tmp/webcam2'
lockfile '/tmp/videoreg.webcam2.lock'
store_max 3
}
log_path '/tmp/videoreg.log'
pid_path '/tmp/videoreg.pid'
mq_queue 'com.ifree.videoreg.daemon'
mq_host 'localhost'
After the installation you are able to manage the process using 'videoreg' command:
$ videoreg -h
Usage: videoreg [options]
-c, --config CONFIG Use the specified config
-d, --device DEVICE Run only the specified device
-H, --halt DEVICE Halt (SIGKILL) recording process
-P, --pause DEVICE Pause (SIGSTOP) recording process
-R, --resume DEVICE Resume (SIGCONT) recording process
-r, --recover DEVICE Recover the recording process
-p, --pid PID Set the PID file for the capture process
-l, --log LOGFILE Set the logfile for daemon
-e, --ensure Check the state of the daemon
-C, --clear Clear the state (remove lock-files)
-k, --kill Kills the capture processes
-v, --version Show the version
-h, --help Show this help message
-U, --udev Generate udev rules for current config
-I, --info Show info about plugged devices
To get the current daemon status:
$ videoreg -c config.rb -e
Running command 'ensure' for device(s): 'all'...
DAEMON: [RUNNING]
Uptime: 4sec
/dev/webcam0: [RUNNING]
/dev/webcam1: [RUNNING]
/dev/webcam2: [NO DEVICE]
To run the daemon:
$ videoreg -c config.rb
Daemon has started successfully
To stop the daemon:
$ videoreg -c config.rb --k
Stopped PID: 3870 at /tmp/videoreg.pid
To stop recording from the specified device:
$ videoreg -c config.rb -H /dev/webcam0
Running command 'halt' for device(s): '/dev/webcam0'...
I, [2012-07-03T14:00:35.802428 #8115] INFO -- : Publish message to RabbitMQ 'HALT' with arg '/dev/webcam0' to 'com.ifree.videoreg.daemon'...
I, [2012-07-03T14:00:36.347704 #8115] INFO -- : Disconnecting from RabbitMQ...
$ videoreg -c config.rb -e
Running command 'ensure' for device(s): 'all'...
DAEMON: [RUNNING]
Uptime: 1min 18sec
/dev/webcam0: [NOT RUNNING]
/dev/webcam1: [RUNNING]
/dev/webcam2: [NO DEVICE]
To run recording from the specified device:
$ videoreg -c config.rb -r /dev/webcam0
Running command 'recover' for device(s): '/dev/webcam0'...
I, [2012-07-03T14:02:12.375352 #8193] INFO -- : Publish message to RabbitMQ 'RECOVER' with arg '/dev/webcam0' to 'com.ifree.videoreg.daemon'...
I, [2012-07-03T14:02:12.920787 #8193] INFO -- : Disconnecting from RabbitMQ...
$ videoreg -c config.rb -e
Running command 'ensure' for device(s): 'all'...
DAEMON: [RUNNING]
Uptime: 2min 34sec
/dev/webcam0: [RUNNING]
/dev/webcam1: [RUNNING]
/dev/webcam2: [NO DEVICE]
To pause the device:
$ videoreg -c config.rb -P /dev/webcam0
Running command 'pause' for device(s): '/dev/webcam0'...
I, [2012-07-03T14:03:28.840693 #8254] INFO -- : Publish message to RabbitMQ 'PAUSE' with arg '/dev/webcam0' to 'com.ifree.videoreg.daemon'...
I, [2012-07-03T14:03:29.386111 #8254] INFO -- : Disconnecting from RabbitMQ...
$ videoreg -c config.rb -e
Running command 'ensure' for device(s): 'all'...
DAEMON: [RUNNING]
Uptime: 3min 50sec
/dev/webcam0: [PAUSED]
/dev/webcam1: [RUNNING]
/dev/webcam2: [NO DEVICE]
To resume the device:
$ videoreg -c config.rb -R /dev/webcam0
Running command 'resume' for device(s): '/dev/webcam0'...
I, [2012-07-03T14:04:34.870130 #8308] INFO -- : Publish message to RabbitMQ 'RESUME' with arg '/dev/webcam0' to 'com.ifree.videoreg.daemon'...
I, [2012-07-03T14:04:35.415852 #8308] INFO -- : Disconnecting from RabbitMQ...
$ videoreg -c config.rb -e
Running command 'ensure' for device(s): 'all'...
DAEMON: [RUNNING]
Uptime: 4min 58sec
/dev/webcam0: [RUNNING]
/dev/webcam1: [RUNNING]
/dev/webcam2: [NO DEVICE]
Get the information about the plugged webcams:
$ videoreg -I
usb1[1-1] --> /dev/webcam0
usb2[2-1] --> /dev/webcam1
To generate the udev rules file (create the user-friendly symlinks to the webcam devices):
$ videoreg -U
Writing the rules to /etc/udev/rules.d/50-udev-videoreg.rules file:
BUS=="usb" ACTION=="add" DEVPATH=="/devices/pci0000:00/0000:00:1a.0/usb1/1-1/*/video4linux/video*" SYMLINK+="webcam0" GROUP="video"
BUS=="usb" ACTION=="add" DEVPATH=="/devices/pci0000:00/0000:00:1d.0/usb2/2-1/*/video4linux/video*" SYMLINK+="webcam1" GROUP="video"
File has been written successfully! Now restart udev (/etc/init.d/udev restart) and replug the webcams!
Changelog
03.07.2012
Current status
- Реализация правил udev (добавление симлинков на девайсы по определённым правилам)
29.06.2012
Current status
- Проверка наличия всех девайсов (камер)
- По команде прервать запись с определенной камеры и начать заново (это нужно чтобы вытащить кадр из текущего кусочка записи)
- "Ленивая" инициализация заданной камеры: пауза/запуск процесса записи
28.06.2012
Current status
- Запуск видеозаписи
- Параметры для всех камер хранятся в одном конфиге (разрешение, фпс, длительность каждого файла)
- Запись по кускам (по 10минут в один файл например)
- Слежение
TODO
- Состояние системы (свободное место на винте, время работы с момента последней перезагрузки и тп) – тоже в конфиге как-то хранить
- Слежение за свободным местом на диске (например записи с камер 1 и 2 должны хранится 12 часов, но все вместе не более 15Гб)
- Алерты об ошибках в Приложение1
- Запуск Приложения3 – при появлении файлов с определенной камеры надо запускать нашу программку (Приложение2), потом файлик удалять (или не удалять – параметр в конфиге)