Source material for this video was an image sequence shot with a Nikon D90. The clouds were moving so quickly that even with shorter intervals (9 seconds; For a different timelapse I used 20 s which was still enough for the clouds there) the video was playing too fast.
slowmoVideo, an Open-Source program which I wrote as my bachelor thesis, can also load image sequences and calculate slow-motion videos from the images. In this case it is rather too fast -> normal speed though ;)
The comparisation part at the end was colour graded for easier distinguishing between the two videos.
If you have questions about slowmoVideo (using, compiling, etc.), please drop me a message on Google+.
Music by Stefano Mocini: A cat playing – Injustice
– Stefano Mocini: http://www.jamendo.com/artist/stefano_mocini
– slowmoVideo: http://slowmovideo.granjow.net/
– Google+ community: https://plus.google.com/communities/116570263544012246711
– Original clips: http://granjow.net/uploads/d7000/Coldfront-Original.avi and http://granjow.net/uploads/d7000/Coldfront-Slowmo.avi