{"id":937,"date":"2013-02-07T18:13:39","date_gmt":"2013-02-07T18:13:39","guid":{"rendered":"https:\/\/www.phillips321.co.uk:443\/?p=937"},"modified":"2013-02-13T17:03:35","modified_gmt":"2013-02-13T17:03:35","slug":"timelapse-with-the-raspberrypi","status":"publish","type":"post","link":"https:\/\/www.phillips321.co.uk\/2013\/02\/07\/timelapse-with-the-raspberrypi\/","title":{"rendered":"Timelapse with the RaspberryPi"},"content":{"rendered":"

So my Raspberry Pi has been sitting in the box for about a month now while it could have been doing something more useful.<\/p>\n

So as I had an evening free I decided to quickly throw something together in order to use a spare webcam to take a photo every 30 or so seconds.<\/p>\n

\"fswebcam\"<\/a><\/p>\n

I had plans to put the webcam and the pi inside an old external light fitting i had but unfortunately with the SD card and USB connections poking out it didnt fit!
\nI guess if I wanted to take this further I could do with a microSD adaper<\/a> and flipping the USB ports around (or hooking directly into the usb<\/a>).<\/p>\n

From a standard raspbian build<\/a> all that’s needed is fswebcam.<\/p>\n

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<\/div><\/td>
apt-get install<\/span> fswebcam<\/div><\/td><\/tr><\/tbody><\/table><\/div>\n

.<\/p>\n

And now to write the timelapse.sh<\/strong> script:<\/p>\n

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<\/div><\/td>
#!\/bin\/bash<\/span>
\ntouch<\/span> \/<\/span>root\/<\/span>IMG-0<\/span>.jpg
\nwhile<\/span> true<\/span>
\ndo<\/span>
\n    sleep<\/span> 15<\/span>
\n    name<\/span>=IMG
\n    if<\/span> [<\/span>[<\/span> -e<\/span> \/<\/span>root\/<\/span>${name}<\/span>-0<\/span>.jpg ]<\/span>]<\/span> ; then<\/span>
\n        i<\/span>=1<\/span>
\n            while<\/span> [<\/span>[<\/span> -e<\/span> \/<\/span>root\/<\/span>${name}<\/span>-${i}<\/span>.jpg ]<\/span>]<\/span> ; do<\/span>
\n                let<\/span> i++
\n            done<\/span>
\n            name<\/span>=${name}<\/span>-${i}<\/span>
\n    fi<\/span>
\n    fswebcam -b<\/span> --log<\/span> file:\/<\/span>root\/<\/span>timelapse.log -r<\/span> 1280x720 -S<\/span> 15<\/span> -d<\/span> \/<\/span>dev\/<\/span>video0 --no-banner<\/span> \/<\/span>root\/<\/span>${name}<\/span>.jpg
\n    sleep<\/span> 15<\/span>
\ndone<\/span>
\nexit<\/span> 0<\/span><\/div><\/td><\/tr><\/tbody><\/table><\/div>\n

And to ensure that it runs at boot time a simple init scrip:<\/p>\n

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<\/div><\/td>
#!\/bin\/sh<\/span>
\n# \/etc\/init.d\/timelapseinit.sh<\/span>
\n# v0.1 phillips321.co.uk<\/span>
\n### BEGIN INIT INFO<\/span>
\n# Provides:          timelapseinit.sh<\/span>
\n# Required-Start:<\/span>
\n# Required-Stop:<\/span>
\n# Default-Start:     2 3 4 5<\/span>
\n# Default-Stop:      0 1 6<\/span>
\n# Short-Description: fswebcam from \/dev\/video0 to \/root\/IMG-n.jpg<\/span>
\n# Description:       Takes photo from webcam at \/dev\/video0 every 30 seconds and put the jpg at \/root\/IMG-n.jpg<\/span>
\n### END INIT INFO<\/span>
\n
\nf_message(<\/span>)<\/span>{<\/span>
\n        echo<\/span> "[+] $1"<\/span>
\n}<\/span>
\n
\n# Carry out specific functions when asked to by the system<\/span>
\ncase<\/span> "$1"<\/span> in<\/span>
\n        start)<\/span>
\n                f_message "Starting timelapse.sh..."<\/span>
\n        \/<\/span>root\/<\/span>timelapse.sh &<\/span>
\n                f_message "timelapse.sh Started"<\/span>
\n                ;;<\/span>
\n        stop)<\/span>
\n                f_message "Stopping timelapse.sh..."<\/span>
\n                killall<\/span> fswebcam
\n        killall<\/span> timelapse.sh
\n                f_message "timelapse.sh stopped"<\/span>
\n                ;;<\/span>
\n        *<\/span>)<\/span>
\n                f_message "Usage: $0 {start|stop|status|restart}"<\/span>
\n                exit<\/span> 1<\/span>
\n                ;;<\/span>
\nesac<\/span>
\nexit<\/span> 0<\/span><\/div><\/td><\/tr><\/tbody><\/table><\/div>\n

And don’t forget to ensure it actually executes:<\/p>\n

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chmod<\/span> +x \/<\/span>etc\/<\/span>timelapseinit.sh
\nchmod<\/span> +x \/<\/span>root\/<\/span>timelapse.sh
\nupdate-rc.d timelapseinit.sh defaults<\/div><\/td><\/tr><\/tbody><\/table><\/div>\n

\"webcambox\"<\/a><\/p>\n

I’ve got plans to power this from solar power and set it up in the green house to watch some plants grow overtime. (I know that not locking the exposure\/whitebalance\/focus and so on will give me crap results…. but remember, my RaspberryPi was sat in a box along with all this kit).<\/p>\n

I’ll post the results in a week or so \ud83d\ude42<\/p>\n","protected":false},"excerpt":{"rendered":"

So my Raspberry Pi has been sitting in the box for about a month now while it could have been doing something more useful. So as I had an evening free I decided to quickly throw something together in order to use a spare webcam to take a photo every 30 or so seconds. I […]<\/p>\n","protected":false},"author":1,"featured_media":945,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[352,350,351,270,333],"_links":{"self":[{"href":"https:\/\/www.phillips321.co.uk\/wp-json\/wp\/v2\/posts\/937"}],"collection":[{"href":"https:\/\/www.phillips321.co.uk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.phillips321.co.uk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.phillips321.co.uk\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.phillips321.co.uk\/wp-json\/wp\/v2\/comments?post=937"}],"version-history":[{"count":9,"href":"https:\/\/www.phillips321.co.uk\/wp-json\/wp\/v2\/posts\/937\/revisions"}],"predecessor-version":[{"id":985,"href":"https:\/\/www.phillips321.co.uk\/wp-json\/wp\/v2\/posts\/937\/revisions\/985"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.phillips321.co.uk\/wp-json\/wp\/v2\/media\/945"}],"wp:attachment":[{"href":"https:\/\/www.phillips321.co.uk\/wp-json\/wp\/v2\/media?parent=937"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.phillips321.co.uk\/wp-json\/wp\/v2\/categories?post=937"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.phillips321.co.uk\/wp-json\/wp\/v2\/tags?post=937"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}