Will Bartlett will118

OS X Preferences

most of these require logout/restart to take effect

# Enable character repeat on keydown
defaults write -g ApplePressAndHoldEnabled -bool false

# Set a shorter Delay until key repeat

Convert MOV to GIF using FFmpeg and ImageMagick

I tried a few different techniques to make a GIF via command-line and the following gives me the best control of quality and size. Once you're all setup, you'll be pumping out GIFs in no time!

Preparation

Install FFmpeg

$ brew install ffmpeg [all your options]
- Example: $ brew install ffmpeg --with-fdk-aac --with-ffplay --with-freetype --with-frei0r --with-libass --with-libvo-aacenc --with-libvorbis --with-libvpx --with-opencore-amr --with-openjpeg --with-opus --with-rtmpdump --with-schroedinger --with-speex --with-theora --with-tools

Install ImageMagick

As tested on Linux:

An SCM_RIGHTS ancillary message is "attached" to the range of data bytes sent in the same sendmsg() call.
However, as always, recvmsg() calls on the receiving end don't necessarily map 1:1 to sendmsg() calls. Messages can be coalesced or split.
The recvmsg() call that receives the first byte of the ancillary message's byte range also receives the ancillary message itself.
To prevent multiple ancillary messages being delivered

	function mapValues(obj, fn) {
	return Object.keys(obj).reduce((result, key) => {
	result[key] = fn(obj[key], key);
	return result;
	}, {});
	}

	function pick(obj, fn) {
	return Object.keys(obj).reduce((result, key) => {
	if (fn(obj[key])) {

	for file in *.m4a; do ffmpeg -qscale 0 -i "$file" "${file%.m4a}.mp3"; done

	#128kに変換するなら-abを使う
	for file in *.m4a; do ffmpeg -aq 100 -i "$file" "${file%.m4a}.mp3"; done