NAME

nordlicht - creates colorful barcodes from video files

SYNOPSIS

nordlicht [OPTION]... VIDEOFILE

-w, --width=INT: set the barcode's width; by default it's "height*10", or 1920 pixels, if both are undefined
-h, --height=INT: set the barcode's height; by default it's "width/10"
-o, --output=FILENAME: set output filename, the default is VIDEOFILE.png; when you specify an *.bgra file, you'll get a raw 32-bit BGRA file that is updated as the barcode is generated
-s, --style=STYLE: default is 'horizontal', see "Styles" section below. You can specify more than one style, separated by '+', to get multiple tracks
--start=FLOAT: specify where to start the barcode (ratio between 0 and 1)
--end=FLOAT: specify where to end the barcode (ratio between 0 and 1)
-q, --quiet: don't show progress indicator
--help: display this help and exit
--version: output version information and exit

horizontal: compress frames to vertical lines and append them
vertical: compress frames to horizontal lines and rotate them counterclockwise by 90 degrees
slitscan: take single columns while constantly moving to the right (and wrapping back to the left)
middlecolumn: take the middlemost column of each frame
thumbnails: display small thumbnails at regular intervals
spectrogram: spectrogram of the first audio track (not all sample formats are supported yet)

nordlicht video.mp4: generate video.mp4.nordlicht.png of default size
nordlicht video.mp4 -s vertical: compress individual frames to columns
nordlicht video.mp4 -w 1000 -h 1000 -o barcode.png: override size and name of the output file

Written by Sebastian Morr and contributors.