z0u’s gists

z0u / mp4-to-gif.sh

Created March 30, 2025 05:31

Converts a video to a gif for embedding in README files.

	sudo apt update && sudo apt install ffmpeg gifsicle

	# First pass: Generate a palette
	ffmpeg -i input.mp4 -vf "fps=10,palettegen" palette.png

	# Second pass: Create the GIF using the palette
	ffmpeg -i input.mp4 -i palette.png -filter_complex "fps=10 [x]; [x][1:v] paletteuse" output.gif

	# Third pass: Optimize the GIF
	gifsicle -O3 --lossy=30 output.gif -o output-optimized.gif

z0u / instance_cache.py

Created September 2, 2016 14:39

Just like functools.lru_cache, but creates a new cache for each instance - which is more useful for methods.

	def instance_method_lru_cache(cache_args, *cache_kwargs):
	'''
	Just like functools.lru_cache, but a new cache is created for each instance
	of the class that owns the method this is applied to.
	'''
	def cache_decorator(func):
	@wraps(func)
	def cache_factory(self, args, *kwargs):
	# Wrap the function in a cache by calling the decorator
	instance_cache = lru_cache(cache_args, *cache_kwargs)(func)

z0u / function_asfrom.py

Created December 1, 2015 23:10

SQLAlchemy workaround for PostgreSQL functions that produce columns

	#
	# Workaround for unusual PostgreSQL syntax, where functions act like columns.
	# Recipe provided by zzzeek (Mike Bayer), author of SA.
	# https://bitbucket.org/zzzeek/sqlalchemy/issues/3594/using-text-in-a-join
	# https://bitbucket.org/zzzeek/sqlalchemy/issues/3566/figure-out-how-to-support-all-of-pgs#comment-23564706
	#

	from sqlalchemy.ext.compiler import compiles
	from sqlalchemy.sql import functions
	from sqlalchemy.sql.elements import ColumnClause

z0u / tornado_cookie_secret_generator.py

Last active February 18, 2021 03:27 — forked from didip/tornado_cookie_secret_generator.py

	#!/usr/bin/env python

	import base64
	import os

	# Get a number that is random enough for cryptographic purposes.
	print base64.b64encode(os.urandom(50)).decode('ascii')

z0u / package_bge_runtime.py

Last active November 24, 2022 21:50

Python script to create an executable game by combining a Blender file with the blenderplayer. Asset files can be included; these will not be combined with the executable, but included in the zip archive. The blenderplayer is sourced from a Blender release archive, so multiple platforms can be targeted. To get a release archive, go to: http://ww…

	#!/usr/bin/env python3

	#
	# This program is free software; you can redistribute it and/or
	# modify it under the terms of the GNU General Public License
	# as published by the Free Software Foundation; either version 2
	# of the License, or (at your option) any later version.
	#
	# This program is distributed in the hope that it will be useful,
	# but WITHOUT ANY WARRANTY; without even the implied warranty of

z0u / test_ep_remove.html

Created May 6, 2013 00:31

Demonstration of jsPlumb issue 30. https://github.com/sporritt/jsPlumb/issues/30

	<!doctype html>
	<html>
	<head>
	<script src="lib/jquery/jquery.js"></script>
	<script src="lib/jquery/jquery-ui.js"></script>
	<script src="lib/jsplumb/jquery.jsPlumb.js"></script>

	<script>
	$(function() {
	jsPlumb.importDefaults({

z0u / git-svn-diff.sh

Created February 4, 2012 22:43 — forked from neowulf/git-svn-diff.sh

Creates a patch file between svn branch and git branch

	#!/bin/bash
	#
	# git-svn-diff originally by (http://mojodna.net/2009/02/24/my-work-git-workflow.html)
	# modified by [email protected]
	# modified by aconway@[redacted] - handle diffs that introduce new files
	# modified by [email protected] - fixes diffs that introduce new files
	# modified by [email protected] - fix sed syntax issue in OS X
	# modified by [email protected] - search for last SVN commit; allow diff
	# against non-tracking branch; remove function names on @@ lines.
	#

Alex Fraser z0u