Thaddeus Ternes tternes

OS X Screencast to animated GIF

This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.

To capture the video (filesize: 19MB), using the free "QuickTime Player" application:

	#!/bin/bash

	# ----------------------------------------------------------------
	# MQTT Configuration values
	# Note: these values can either be defined in the environment, or
	# in the raspotify conf file (/etc/raspotify/conf on Raspberry Pi OS)
	#
	# - LIBRESPOT_MQTT_HOST: the MQTT broker host/ip where events should be published
	# - LIBRESPOT_MQTT_TOPIC: topic where events will be published
	#

	// NOTE: filenames hardcoded!

	const got = require('got')
	const csv = require('csv')
	const fs = require('fs')

	async function fetchGoogleBookId(isbn) {
	const queryUrl = `https://www.googleapis.com/books/v1/volumes?q=isbn:${isbn}`
	const response = await got(queryUrl)
	const json = JSON.parse(response.body)

	static EVILoggingCallback s_callback = nil;

	#pragma mark -

	void EVILog(EVILogLevel level, NSString *fmt, ...)
	{
	va_list ap;
	va_start(ap, fmt);

	if(s_callback)

	- (void)start:(NSString *)queueItemId
	{
	// ...
	EVILog(EVILogLevelInfo, @"started playing %@", queueItemId);
	// ...
	}

	@implementation AppDelegate

	- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
	{
	// ...
	EVIRegisterLoggingCallback(^(EVILogLevel level, NSString *message) {
	NSLog(@"EVIStreamer (%@): %@", EVILogLevelString(level), message);
	});
	// ...
	}

	typedef NS_OPTIONS(NSInteger, EVILogLevel)
	{
	EVILogLevelError,
	EVILogLevelWarning,
	EVILogLevelInfo,
	EVILogLevelDebug,
	};

	typedef void(^EVILoggingCallback)(EVILogLevel level, NSString *message);

	clang hi.c -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk -o hi

	where -isysroot parameter is discovered with:

	xcrun --sdk macosx10.9 --show-sdk-path

	--sdk parameter possibilities:

	thaddeus@pegasus:~$ xcodebuild -showsdks
	OS X SDKs:

	BTPactolaNotificationRequest *request = [[BTPactolaNotificationRequest alloc] init];
	request.deviceIdentifier = @"123456";
	request.title = @"My App"
	request.message = @"Something Happened!"
	[request sendRequest];