Abe Estrada AbeEstrada

Setting up Pi Zero OTG - The quick way (No USB keyboard, mouse, HDMI monitor needed)

More details - http://blog.gbaman.info/?p=791

For this method, alongside your Pi Zero, MicroUSB cable and MicroSD card, only an additional computer is required, which can be running Windows (with Bonjour, iTunes or Quicktime installed), Mac OS or Linux (with Avahi Daemon installed, for example Ubuntu has it built in).
1. Flash Raspbian Jessie full or Raspbian Jessie Lite onto the SD card.
2. Once Raspbian is flashed, open up the boot partition (in Windows Explorer, Finder etc) and add to the bottom of the config.txt file dtoverlay=dwc2 on a new line, then save the file.
3. If using a recent release of Jessie (Dec 2016 onwards), then create a new file simply called ssh in the SD card as well. By default SSH i

Adaptive Streaming has become the neccessity for streaming video and audio. Unfortantely, as of this post, there isn't a whole lot of tutorials that accumulate all of the steps to get this working. Hopefully this post achieves that. This post focuses on using Amazon Web Services (AWS) to transcode for HLS and DASH and be the Content Delivery Network (CDN) that delivers the stream to your web page. We'll be using Video.js for the HTML5 player as well as javascript support libaries to make Video.js work with HLS and DASH.

So Here's what you need:

Set up three S3 buckets

Regular Colors

Value	Color
\e[0;30m	Black
\e[0;31m	Red
\e[0;32m	Green
\e[0;33m	Yellow
\e[0;34m	Blue
\e[0;35m	Purple

Reading waveform data in ffmpeg

When working on an audio player, I wanted to extract the audio waveform data to paint the audio waveform dynamically in the browser on a <canvas> element.

Initially I used the bbc/audiowaveform package but this proved problematic for a number of reasons. First I wasn't able to install that package (or build the binary) in macOS for local dev. The other big issue is that I was only able to figure out how to install it on Ubuntu, so I couldn't use it in Alpine (for Docker images) or other environments like cloud functions.

Initial approach

I found out from these docs it's possible to paint a waveform with ffmpeg by extracting raw audio data:

	#![feature(lang_items, asm)]
	#![crate_type = "staticlib"]
	#![no_std]

	const GPIO_BASE: u32 = 0x3F000000;
	const GPIO_SET: u32 = 0x3F200020;
	const GPIO_CLR: u32 = 0x3F20002C;
	const GPIO47: u32 = 0x8000;

	fn sleep(value: u32){

	# lazyload nvm
	# all props goes to http://broken-by.me/lazy-load-nvm/
	# grabbed from reddit @ https://www.reddit.com/r/node/comments/4tg5jg/lazy_load_nvm_for_faster_shell_start/

	lazynvm() {
	unset -f nvm node npm npx
	export NVM_DIR=~/.nvm
	[ -s "$NVM_DIR/nvm.sh" ] && . "$NVM_DIR/nvm.sh" # This loads nvm
	if [ -f "$NVM_DIR/bash_completion" ]; then
	[ -s "$NVM_DIR/bash_completion" ] && \. "$NVM_DIR/bash_completion" # This loads nvm bash_completion

	#!/bin/bash

	# Tom Hale, 2016. MIT Licence.
	# Print out 256 colours, with each number printed in its corresponding colour
	# See http://askubuntu.com/questions/821157/print-a-256-color-test-pattern-in-the-terminal/821163#821163

	set -eu # Fail on errors or undeclared variables

	printable_colours=256


	function string:contains(sub)
	return self:find(sub, 1, true) ~= nil
	end

	function string:startswith(start)
	return self:sub(1, #start) == start
	end

	function string:endswith(ending)

	var USERS = {
	protecteddir: [{
	username: 'user',
	password: 'pass',
	}],
	};

	//Response when auth is not valid.
	var response401 = {
	statusCode: 401,

	<?php
	/*
	A simple PHP class to perform basic operations against Amazon S3 and compatible
	services. Requires modern PHP (7+, probably) with curl, dom, and iconv modules.

	Copyright 2022 Marco Arment. Released under the MIT license:

	Permission is hereby granted, free of charge, to any person obtaining a copy
	of this software and associated documentation files (the "Software"), to deal
	in the Software without restriction, including without limitation the rights