Revision as of 19:39, 16 March 2014

Time-lapse

Time-lapsing is a trick of technology to get rid of our limited perception of time. By recording shots and playing them back at a different speed, one can reach to the other timescales, namely, the slow ones for time-lapses and the fast ones for slow-motion.

Our input

we currently work (as of 30 December (2013)) on time-lapsing of the Plaza Mayor from our vantage point at Mayorcita.

• The Little People, our first timelapse of the Plaza Mayor at one image every second was so successful—although with cuts, irregularities and poor image resolution—that we uploaded it to the Internet, along with an interpretation of Alfonsina y el mar by Elena.
• 17 hours in the life of a Plaza Mayor and its faster version, our second timelapse, this time at a reduced repetition rate (one image every 10 seconds) but for 17 hours, with the sounds and rythms of Zyryab from Paco de Lucía and his sextet.

Carlos Sanchez's input

Carlos is also exploring time-lapsing and once in a while release some publicly. Notable are:

• Nubes desde la Plaza Mayor, a view of the Santa Cruz from our flat, the first timelapse from Mayorcita and with a camera.
• Timescales, mainly clouds again, but this time with the view from our office.
• 6am, sunrise over las Cuatro Torres de Madrid from his flat.

Technical bits

We work both with our Nikon D40 camera and our HTC smartphone with (http://www.lapseit.com/ LapseIt].

The D40 has no built-in feature, se we recourse to gphoto2~[1].

The following is a basic setting to capture (here every 30s):

gphoto2 --capture-image-and-download --filename "%Y-%m-%d..%H%M%S.jpg" --interval 30

To assemble the frames into a movie (15 fps):

avconv -f image2 -r 15 -i imageSequence0000%04d.jpg-vcodec libx264 output.mp4

To add the timestamp on the image itself (say at position 10x470), use this script:

#!/bin/bash

timestamp=`date -r $1 +%H:%M`
echo $timestamp;
convert -draw "text 10,470 '$timestamp'" $1 $1.jpg

See also

• Koyaanisqatsi, a combination of slow-mo & time-lapses with music by Philip Glass.

Links

• Wikipedia.