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Live Transcoding

This is a collection of working commandline examples to show how one could use FFMpeg and VLC for live transcoding of video streams. All examples have been tested on OSX 10.7.5 with FFMPeg 1.1.3 and VLC 2.0.5 in early 2013.

Documentation links

• FFMpeg, Muxers, Encoders, Protocols
• FFMPEG multiple outputs
• VLC Docu, Advanced Use

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Ubuntu 18.04 Mail Server

Overview

Steps were re-written from below links for faster setup.
This guide assumes you are using Ubuntu 18 and Nginx.

Part 1: Build Your Own Email Server on Ubuntu: Basic Postfix Setup - LinuxBabe
Part 2: Install Dovecot IMAP server on Ubuntu and Enable TLS Encryption
Part 3: How to Set up SPF and DKIM with Postfix on Ubuntu Server

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<?php
defined('BASEPATH') OR exit('No direct script access allowed');
/**
 * Single Sender FIrebase Push To Android
 *
 * @package Codeigniter
 * @author Vicky Saputra <http://vicky.work
 **/
class Firebase_push
{

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<?php
/*  
Parameter Example
	$data = array('post_id'=>'12345','post_title'=>'A Blog post');
	$target = 'single tocken id or topic name';
	or
	$target = array('token1','token2','...'); // up to 1000 in one request
*/
public function sendMessage($data,$target){
//FCM api URL

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Parameters

Container: MP4

Parameter	YouTube recommends setting
-movflags faststart	moov atom at the front of the file (Fast Start)

Video codec: H.264

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#!/usr/bin/env bash
START_TIME=$SECONDS
set -e

echo "-----START GENERATING HLS STREAM-----"
# Usage create-vod-hls.sh SOURCE_FILE [OUTPUT_NAME]
[[ ! "${1}" ]] && echo "Usage: create-vod-hls.sh SOURCE_FILE [OUTPUT_NAME]" && exit 1

# comment/add lines here to control which renditions would be created
renditions=(

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#!/bin/bash

while true; do
	currTime=`date +%Y%m%d%H%M`
	if [ "$currTime" -ge 201507081658 -a "$currTime" -le 201507082300 ]; then
		echo "$currTime: Stream should be on. Start ffmpeg if the process does not exist"
		if [ "$(pidof ffmpeg)" ]; then
			echo "$currTime: ffmpeg already running."
			sleep 10
		else

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FFmpeg streaming

These are some ffmpeg command lines used when developing VHS dubbing controller.

HLS Stream (on Linux)

#!/bin/bash

# Stream a PAL 50i capture, cropped and de-interlaced using ffmpeg

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#!/bin/bash
# (C) Karl Mitchell 2017, GPL: https://www.gnu.org/licenses/gpl-3.0.en.html
# Best run once daily, e.g. using launchd or cron job, during quiet time
# Converts Channels DVR to a Plex & iOS-friendly m4v (h.264) format
# Pre-requisites:
#  HandBrakeCLI (video transcoding application)
# Optional pre-requisites:
#  MP4Box (part of GPAC, use MacPorts or similar) for marking commercials start/end as chapters
#  Curl and an IFTTT Maker Key for phone statusnotifications.
#  FFMPeg (a part of channels DVR, but you'll need to point to it) for commercial trimming

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# Get video duration in frames
	duration=$(ffmpeg -i [filename] 2>&1 | sed -n "s/.* Duration: \([^,]*\), start: .*/\1/p")
	fps=$(ffmpeg -i [filename] 2>&1 | sed -n "s/.*, \(.*\) tbr.*/\1/p")
	hours=$(echo $duration | cut -d":" -f1)
	minutes=$(echo $duration | cut -d":" -f2)
	seconds=$(echo $duration | cut -d":" -f3)
	FRAMES=$(echo "($hours*3600+$minutes*60+$seconds)*$fps" | bc | cut -d"." -f1)

# Start ffmpeg, use awk to flush the buffer and remove carriage returns
	ffmpeg -i [filename] [options] [outputfile] 2>&1 | awk '1;{fflush()}' RS='\r\n'>[errorlog] &