CHANG-NING TSAI crazyguitar

Using the ssh agent

The following would show a similar output if a key is already added to your agent, and you are good to go.

$ ssh-add -l
2048 d7:8e:3d:03:9c:4f:f8:9d:04:0f:11:c5:24:e1:2f:3a rsa w/o comment (RSA)

The following will show if no agent is running.

SSH Forwarding on MacOS X

Forwarding SSH agent

Configure ~/.ssh/config

# Allow Agent forwarding for a specific host (by security)
Host remotehost
  ForwardAgent yes

Changing playback sound speed in realtime with python and multiprocessing

This is a script to change the sound speed in real time like for example background music in pygame.

The script generates the raw data of a sound file each time there is space in the queue. The sample will scale to the desired speed which you can modify with sound_Factor.

To play the music, you just need to get buffers from the queue and pass them to your music stream. Exemple for pygame :

# musique update
if channel.get_queue() == None:

ffmpeg

Converting Audio into Different Formats / Sample Rates

Minimal example: transcode from MP3 to WMA:
ffmpeg -i input.mp3 output.wma

You can get the list of supported formats with:
ffmpeg -formats

Convert WAV to MP3, mix down to mono (use 1 audio channel), set bit rate to 64 kbps and sample rate to 22050 Hz:

using Ansible command line:

ansible-playbook --connection=local 127.0.0.1 playbook.yml

using inventory:

127.0.0.1 ansible_connection=local

	"""
	This gist shows how to run asyncio loop in a separate thread.
	It could be useful if you want to mix sync and async code together.
	Python 3.7+
	"""
	import asyncio
	from datetime import datetime
	from threading import Thread
	from typing import Tuple, List, Iterable

	"""Simple demo of using Flask with aiohttp via aiohttp-wsgi's
	WSGIHandler.

	"""

	import asyncio
	from aiohttp import web
	from aiohttp_wsgi import WSGIHandler
	from flask import Flask, render_template

	#define BOOST_RESULT_OF_USE_DECLTYPE

	#include <chrono>
	#include <thread>
	#include <boost/mpi.hpp>

	#include <iostream>
	#include <sstream>

	#include <utility>

	#ifndef __CONSUMERPRODUCERQUEUE_H__
	#define __CONSUMERPRODUCERQUEUE_H__

	#include <queue>
	#include <mutex>
	#include <condition_variable>

	/*
	* Some references in order
	*

	MIT License

	Copyright (c) 2018 Oleg Yamnikov

	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
	to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	copies of the Software, and to permit persons to whom the Software is
	furnished to do so, subject to the following conditions: