Tatsuya Shiozawa COx2

Enable PipeWire on Ubuntu 22.04

This guide is only for original Ubuntu out-of-the-box packages. If you have added a custom PPA like pipewire-debian, you might get into conflicts.

Ubuntu 22.04 has PipeWire partially installed and enabled as it's used by browsers (WebRTC) for recoding the screeen under Wayland. We can enable remaining parts and use PipeWire for audio and Bluetooth instead of PulseAudio.

Starting from WirePlumber version 0.4.8 automatic Bluetooth profile switching (e.g. switching from A2DP to HSP/HFP when an application needs microphone access) is supported. Jammy (22.04) repos provide exactly version 0.4.8. So, we're good.

Based on Debian Wiki, but simplified for Ubuntu 22.04.

We have Server machine, this computer with Headphones, and we have Client computer, this is remote PC with music =) On Server we should first open port for listening connections from Client :

# on ubuntu 
sudo ufw allow from <Client_IP> to any port 4656 proto tcp
# on fedora ( with firewalld ) 
sudo firewall-ctl --add-port 4656/tcp

note: port 4656 just for sample. you can use any port you want
than on Server, from current user add listening for connections

FFmpeg cheat sheet

A list of useful commands for the ffmpeg command line tool.

Download FFmpeg: https://www.ffmpeg.org/download.html

Full documentation: https://www.ffmpeg.org/ffmpeg.html

Basic conversion

FFmpeg チートシート

コマンドラインツール ffmpeg の有用なコマンド:

FFmpeg ダウンロード: https://www.ffmpeg.org/download.html

文書: https://www.ffmpeg.org/ffmpeg.html

変換の基本形

WebAudio+WebSocketでブラウザへの音声リアルタイムストリーミングを実装する

WebRTCでやれよ！と言われそうなところですが、 WebSocket+WebAudioの組み合わせで音声ストリーミングをシンプルに構成する方法を紹介してみます。

サーバーサイド(Node.js + ws + pcm)

サーバーサイドは何でも良いのですが、とりあえずNode.jsでtest.mp3というサンプルファイルをpcmモジュールでデコードし、 wsでクライアントに垂れ流す作りにしておきます。

これは何?

Chrome M94 で追加された以下のAPIを使ったTSのライブ再生用デモ実装

WebCodecs
Insertable Stream for MediaStreamTrack

使い方

mpgets.js と同じような構成で (max_delay はリップシンクのため 0 推奨, データストリームは入れない事を推奨)

	#! /bin/bash
	# Simple Utility Script for allowing debug of hardened macOS apps.
	# This is useful mostly for plug-in developer that would like keep developing without turning SIP off.
	# Credit for idea goes to (McMartin): https://forum.juce.com/t/apple-gatekeeper-notarised-distributables/29952/57?u=ttg
	# Update 2022-03-10: Based on Fabian's feedback, add capability to inject DYLD for sanitizers.
	#
	# Please note:
	# - Modern Logic (on M1s) uses `AUHostingService` which resides within the system thus not patchable and REQUIRES to turn-off SIP.
	# - Some hosts uses separate plug-in scanning or sandboxing.
	# if that's the case, it's required to patch those (if needed) and attach debugger to them instead.

	#!/bin/sh

	[ -x /etc/vnc/xstartup ] && exec /etc/vnc/xstartup
	[ -r $HOME/.Xresources ] && xrdb $HOME/.Xresources
	vncconfig -iconic &
	export DESKTOP_SESSION=/usr/share/xsessions/ubuntu.desktop
	export XDG_CURRENT_DESKTOP=ubuntu:GNOME
	export GNOME_SHELL_SESSION_MODE=ubuntu
	export XDG_DATA_DIRS=/usr/share/ubuntu:/usr/local/share/:/usr/share/:/var/lib/snapd/desktop
	dbus-launch --exit-with-session /usr/bin/gnome-session --systemd --session=ubuntu

	#include "TransparentOpenGLComponent.h"

	using namespace juce;

	TransparentOpenGLComponent::TransparentOpenGLComponent()
	{
	openGLContext.setComponentPaintingEnabled (true);
	openGLContext.setRenderer (this);
	openGLContext.setContinuousRepainting (true);
	openGLContext.attachTo (*this);

	#!/usr/bin/env bash
	#
	# This is an adaptation of code I wrote to download a private binary from GitHub. Such...pain.
	# Why can't GitHub just offer a standardized URL you can download a release binary from and attach
	# your Github Personal Access Token as a header?
	#
	# Since this code is an adaptation it hasn't been directly tested, but the code it was adapted from works
	# and hopefully you can get the missing piece you're after by looking here.
	#