Sunny Sunday time-lapse

Today was a nice and sunny winter Sunday, with outside temperatures around -6°C.  From the weather camera capturing an image every minute, a time-lapse video covering approximately 12 hours is assembled. It shows the changing weather conditions plus a few cross country skiers enjoying themselves in the sunshine. It takes about 3.5 minutes to show. I think you also agree that the Raspberry PI weather camera does a pretty good job with the heater system keeping it in focus!

Time-lapse 25. Jan 2015

 

The video was created automatically by first generating a label in the bottom left corner of each image. The information about exposure and camera temperature sensors is taken from XML files generated by the on-board RPI software.

Second, 3 interpolated images between each pair of originals were created, effectively giving the impression of images taken every 15 seconds.  The XML generation, image interpolation and labelling software is home grown.

The final step was time-lapse video generation using ffmpeg.  A bash script running under Kubuntu orchestrates the whole thing,  but a very similar process can easily be achieved under e.g. Windows.

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