Initial commit

scripts/crop-one.sh

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+#!/bin/bash
+
+# convert a full frame to one that's cropped to only the interesting part and scaled to 256 pixels
+# wide. the "throbber" images are played in a loop by plymouth.
+
+# ex. frames/0001.png -> blåhaj/throbber-0001.png
+in="$1"
+out=blåhaj/throbber-$(basename "$in")
+ffmpeg -loglevel quiet -i "$in" -vf crop=806:529:1517:716,scale=256:-1 -y "$out"
+# optional, makes output files a bit smaller
+optipng -o7 -silent "$out"

scripts/crop.sh

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+#!/bin/bash
+
+# just calling crop-one.sh on every PNG in frames/
+find frames -type f -name '*.png' | parallel --bar --jobs $(nproc) ./scripts/crop-one.sh

scripts/fade-one.py

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+#!/usr/bin/env python3
+
+# this script creates a second version of the animation that fades out over time. these files are
+# animation-XXXX.png. i think plymouth could use this to smooth the transition to the login screen,
+# although it doesn't seem to be used for me.
+
+import os
+import re
+import sys
+
+digits = re.compile(r'\d+')
+
+# like blåhaj/throbber-0001.png
+filename = sys.argv[1]
+num = int(digits.search(filename).group())
+# fades from 1.0 to 1/60 over the animation
+opacity = (61 - num) / 60
+output = filename.replace('throbber', 'animation')
+os.system(f'ffmpeg -loglevel quiet -i {filename} -vf colorchannelmixer=aa={opacity} -y {output}')
+os.system(f'optipng -o7 -silent {output}')

scripts/fade.sh

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+#!/bin/bash
+
+# run fade-one.py on every throbber image in parallel
+find blåhaj -type f -name 'throbber-*.png' | parallel --bar --jobs $(nproc) ./scripts/fade-one.py