thetzel’s gists

thetzel / get-mp3-chapters.sh

Created August 14, 2025 21:04

Gets the beginning of a mp3 file and looks for chapters until it finds them

	#!/usr/bin/env bash
	# fetch the smallest possible head of an MP3 to list chapters (HH:MM:SS)
	# deps: curl, ffprobe (ffmpeg), jq, column, awk
	set -euo pipefail

	usage() {
	cat <<EOF
	Usage: $0 <mp3_url> [--json] [--max-mb N] [--quiet]
	--json Output chapters as JSON (seconds), not a table
	--max-mb N Stop after N megabytes (default: 32)

thetzel / main.go

Last active June 21, 2020 23:03

Exposure Notification Scanning on Raspberry Pi

	package main

	import (
	"fmt"
	"log"

	"github.com/paypal/gatt"
	"github.com/paypal/gatt/examples/option"
	)

thetzel / coupons.tex

Created December 27, 2013 13:57

Serialized Coupons in LaTeX

	\documentclass[10pt,parskip=full,a4paper]{article}

	\pagestyle{empty}

	\usepackage[top=2.5cm,left=1cm,right=1cm]{geometry}
	\usepackage{csvtools}
	\usepackage{lmodern}
	\renewcommand*\familydefault{\sfdefault}
	\usepackage[T1]{fontenc}

thetzel / main.m

Created July 3, 2013 20:44

Fork app in main.m between old codebase for iOS5/6 and new for iOS7+

	NSUInteger DeviceSystemMajorVersion();
	NSUInteger DeviceSystemMajorVersion() {
	static NSUInteger _deviceSystemMajorVersion = -1;
	static dispatch_once_t onceToken;
	dispatch_once(&onceToken, ^{
	_deviceSystemMajorVersion = [[[[[UIDevice currentDevice] systemVersion] componentsSeparatedByString:@"."] objectAtIndex:0] intValue];
	});
	return _deviceSystemMajorVersion;
	}

thetzel / inapp.php

Created July 13, 2012 20:01

In App Purchase Verification PHP Code

	<?php

	function verifyPurchase($transactionid, $productid, $uuid, $sandbox=false) {


	$body = @file_get_contents('php://input');

	//encode receipt
	$body = base64_encode($body);
	$receipt = json_encode(array("receipt-data" => $body));

thetzel / audition2chapters.m

Created February 19, 2012 17:43

Parse Markers from Audition Session File to Chapter List

	- (BOOL)application:(NSApplication)app openFile:(NSString)file{

	NSData *data = [[NSData alloc] initWithContentsOfFile:file];
	NSString *query = @"/sesx/session/xmpMetadata";
	NSArray *result = PerformXMLXPathQuery(data, query);


	NSString *xmpQuery = @"/x:xmpmeta/rdf:RDF/rdf:Description/xmpDM:Tracks/rdf:Bag/rdf:li/xmpDM:markers/rdf:Seq";
	NSString *xmpMetadataString = [[[[result objectAtIndex:0] objectForKey:@"nodeChildArray"] objectAtIndex:0] objectForKey:@"nodeContent"];
	NSData *xmpMetadataData = [xmpMetadataString dataUsingEncoding:NSUTF8StringEncoding];