slitscan/README.org


* 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.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 (mac)...
#+BEGIN_SRC shell
brew install ffmpeg drracket
git clone https://github.com/zzkt/slitscan.git
#+END_SRC

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

simple transform...
#+BEGIN_SRC shell
racket slitscan.rkt -v -i <input.mp4> 
#+END_SRC

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

options...
#+BEGIN_SRC shell
slitscan [ <option> ... ]
 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
  --horizontal : output a horizontal video only (default: both)
  --vertical : output a vertical video only (default: both)
  --width <pixels> : width of output output video
  --height <pixels> : height of output output video
  -i <video>, --input <video> : input file
  -f <folder>, --folder <folder> : input folder
  --help, -h : Show this help
#+END_SRC


* further reading

  - 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
"...because the geometry of the abyss demands it" 2019-08-12 12:40:19 +00:00
			`* 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.`

"now the shadows I measure" 2019-08-12 13:26:11 +00:00			`[[slitscope.jpeg]]`
"...because the geometry of the abyss demands it" 2019-08-12 12:40:19 +00:00
			`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 (mac)...`
			`#+BEGIN_SRC shell`
			`brew install ffmpeg drracket`
			`git clone https://github.com/zzkt/slitscan.git`
			`#+END_SRC`

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

			`simple transform...`
			`#+BEGIN_SRC shell`
			`racket slitscan.rkt -v -i <input.mp4>`
			`#+END_SRC`

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

			`options...`
			`#+BEGIN_SRC shell`
			`slitscan [ <option> ... ]`
			`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`
			`--horizontal : output a horizontal video only (default: both)`
			`--vertical : output a vertical video only (default: both)`
			`--width <pixels> : width of output output video`
			`--height <pixels> : height of output output video`
			`-i <video>, --input <video> : input file`
			`-f <folder>, --folder <folder> : input folder`
			`--help, -h : Show this help`
			`#+END_SRC`


			`* further reading`

			`- 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`