yeetim yeetim

使用ffmpeg合并MP4文件

ffmpeg -i "Apache Sqoop Tutorial Part 1.mp4" -c copy -bsf:v h264_mp4toannexb -f mpegts intermediate1.ts
ffmpeg -i "Apache Sqoop Tutorial Part 2.mp4" -c copy -bsf:v h264_mp4toannexb -f mpegts intermediate2.ts
ffmpeg -i "Apache Sqoop Tutorial Part 3.mp4" -c copy -bsf:v h264_mp4toannexb -f mpegts intermediate3.ts
ffmpeg -i "Apache Sqoop Tutorial Part 4.mp4" -c copy -bsf:v h264_mp4toannexb -f mpegts intermediate4.ts
ffmpeg -i "concat:intermediate1.ts|intermediate2.ts|intermediate3.ts|intermediate4.ts" -c copy -bsf:a aac_adtstoasc "Apache Sqoop Tutorial.mp4"

Secured HLS setup with Nginx as media server

This example is part of this article.

This is an example for an HLS delivery with basic security. Nginx compiled with nginx-rtmp-module & secure-link is used as media server. Features:

Domain filtering
Referrer filtering
Embed buster

	#!/usr/bin/env bash
	# repository
	cd /tmp
	wget http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
	rpm -Uvh epel-release-6-8.noarch.rpm

	# system update
	yum -y update
	yum -y groupinstall "Development Tools"
	yum -y install libxslt-devel libyaml-devel libxml2-devel gdbm-devel libffi-devel zlib-devel openssl-devel libyaml-devel readline-devel curl-devel openssl-devel pcre-devel git memcached-devel valgrind-devel mysql-devel ImageMagick-devel ImageMagick

	ffmpeg功能极其强大，堪比图像处理的ImageMagik。下面是一些常用的命令，记下备用。
	1：得到视频信息
	ffmpeg -i input.xxx
	2: 将图像序列转换为视频
	ffmpeg -f image2 -i prefix%d.jpg output.xxx
	3:将视频转换为图像序列
	ffmpeg -i input.xxx -r FPS -qscale 1 -vsync 0 $prefix%d.jpg
	其中FPS为每秒抽多少帧
	4:将视频转换为yuv格式
	ffmpeg -i input.avi ouput.yuv

	#!/usr/bin/env python

	#
	# Converts any integer into a base [BASE] number. I have chosen 62
	# as it is meant to represent the integers using all the alphanumeric
	# characters, [no special characters] = {0..9}, {A..Z}, {a..z}
	#
	# I plan on using this to shorten the representation of possibly long ids,
	# a la url shortenters
	#

	package main

	import (
	"context"
	"flag"
	"fmt"
	"log"
	"net/http"
	"os"
	"os/signal"

	// Implementation in ES6
	function pagination(c, m) {
	var current = c,
	last = m,
	delta = 2,
	left = current - delta,
	right = current + delta + 1,
	range = [],
	rangeWithDots = [],
	l;