* time, space, stacking, slicing, scanning, etc 

“Slitscan imaging techniques are used to create static images of time-based phenomena. In traditional film photography, slit scan images are created by exposing film as it slides past a slit-shaped aperture. In the digital realm, thin slices are extracted from a sequence of video frames, and concatenated into a new image.”

[[http://www.flong.com/texts/lists/slit_scan/][An Informal Catalogue of Slit-Scan Video Artworks and Research]] Compiled by Golan Levin.

[[slitscope_0.jpeg]]

This particular slitscan provides some slightly configurable scaffolding around ffmpeg (based on a blogpost from [[http://oioiiooixiii.blogspot.com/2017/11/ffmpeg-temporal-slice-stacking-effect.html][oioiiooixiii]]) and is intended for non-realtime rendering at various resolutions. it's neither first, nor last. it's not especially interesting, educational or efficient. just another cloudform in the endless space of possible implementation…

* installation, configuration, operation, etc

install (macOS)…
#+BEGIN_SRC text
brew install ffmpeg drracket
git clone https://github.com/zzkt/slitscan.git
#+END_SRC

install (debian/ubuntu)…
#+BEGIN_SRC text
sudo apt install ffmpeg racket
git clone https://github.com/zzkt/slitscan.git
#+END_SRC

simple transform…
#+BEGIN_SRC text
racket slitscan.rkt -v input.mp4
#+END_SRC

transform at 1080p and delete working files, with minimal command line noise…
#+BEGIN_SRC text
racket slitscan.rkt --width 1920 --height 1080 --loglevel quiet --cleanup input.mp4
#+END_SRC

options…
#+BEGIN_SRC text
slitscan [ <option> ... ] <video-file>
 where <option> is one of
  -v, --verbose : various verbose messages
  -l <level>, --loglevel <level> : loglevel for ffmpeg e.g. quiet, error, warning, info, debug
  -c, --cleanup : Clean up temporary/working files
  -n, --noresize : do not resize the input file
  --horizontal : output a horizontal video only (default: both)
  --vertical : output a vertical video only (default: both)
  --width <pixels> : width of transform video
  --height <pixels> : height of tansform video
  -f <folder>, --in-folder <folder> : input folder
  -o <folder>, --out-folder <folder> : output folder
  --help, -h : Show this help
#+END_SRC

* further, etc

[[slitscope_1.jpeg]]

  - The Fourth Dimension and How to Get There by Rudy Rucker
  - Muybridge's Complete Human and Animal Locomotion, Vol. I
  - Baroness Elsa, by Irene Gammel