I wanted to setup a tiny timelapse-rig using raspberry pi and the official addon-camera.
A quick search returned MotionPie ( https://github.com/ccrisan/motionPie ), and after setting it up using the supplied wiki-pages and some initial configuration I had a feed to watch.
I plugged in a USB-drive (make sure it has a partition and a filesystem MotinoPie can read (ext4 f.ex.)) and under the admin-menu, and “File Storage” you should be able to select the external storage.
In order to create a timelapse you have to save snapshots at regular intervals, this is done under “Still Images”, select “Interval Snapshots” under “Capture Mode” and insert a interval.
Remember 30 pictures per second for a movie equalls 1800 pictures per minute of video.
Dont exagerate your interval, or you will have a very long (and boring?) timelapse.
15s interval over 3 days is 10 minutes of video and 18 000 pictures.
Now the tricky part was that I wanted to create the timelapse outside of MotionPie, and therefore I needed the pictures in sequence, and not using the default file naming.
There was no real legend with variables that I wanted (I wanted to use unix time) – so some quick googling led me to this handy site ( http://www.cyberciti.biz/faq/linux-unix-formatting-dates-for-display/ ) – and that site had this handy table:
|%%||a literal %|
|%a||locale’s abbreviated weekday name (e.g., Sun)|
|%A||locale’s full weekday name (e.g., Sunday)|
|%b||locale’s abbreviated month name (e.g., Jan)|
|%B||locale’s full month name (e.g., January)|
|%c||locale’s date and time (e.g., Thu Mar 3 23:05:25 2005)|
|%C||century; like %Y, except omit last two digits (e.g., 21)|
|%d||day of month (e.g, 01)|
|%D||date; same as %m/%d/%y|
|%e||day of month, space padded; same as %_d|
|%F||full date; same as %Y-%m-%d|
|%g||last two digits of year of ISO week number (see %G)|
|%G||year of ISO week number (see %V); normally useful only with %V|
|%h||same as %b|
|%j||day of year (001..366)|
|%k||hour ( 0..23)|
|%l||hour ( 1..12)|
|%p||locale’s equivalent of either AM or PM; blank if not known|
|%P||like %p, but lower case|
|%r||locale’s 12-hour clock time (e.g., 11:11:04 PM)|
|%R||24-hour hour and minute; same as %H:%M|
|%s||seconds since 1970-01-01 00:00:00 UTC|
|%T||time; same as %H:%M:%S|
|%u||day of week (1..7); 1 is Monday|
|%U||week number of year, with Sunday as first day of week (00..53)|
|%V||ISO week number, with Monday as first day of week (01..53)|
|%w||day of week (0..6); 0 is Sunday|
|%W||week number of year, with Monday as first day of week (00..53)|
|%x||locale’s date representation (e.g., 12/31/99)|
|%X||locale’s time representation (e.g., 23:13:48)|
|%y||last two digits of year (00..99)|
|%z||+hhmm numeric timezone (e.g., -0400)|
|%:z||+hh:mm numeric timezone (e.g., -04:00)|
|%::z||+hh:mm:ss numeric time zone (e.g., -04:00:00)|
|%:::z||numeric time zone with : to necessary precision (e.g., -04, +05:30)|
|%Z||alphabetic time zone abbreviation (e.g., EDT)|
So then it was just a matter of replacing anything under “Image File Name” with “pics/%s” – and everything will be jolly good.