yeetim

Using MongoDB in golang with mgo

yeetim

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

yeetim

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

yeetim

package main

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

yeetim

#!/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
#

yeetim

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

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"

yeetim

#!/usr/bin/env bash
PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin
export PATH
cur_dir=$(pwd)
if [ $(id -u) != "0" ]; then
    echo "Error: You must be root to run this script, please use root to install lnmp"
    exit 1
fi
clear
echo "========================================================================="

yeetim

#查看当前TCP链接状态
netstat -n | awk '/^tcp/ {++state[$NF]} END {for(key in state) print key,"\t",state[key]}'
#CLOSED：     无连接是活动的或正在进行
#LISTEN：     服务器在等待进入呼叫
#SYN_RECV：   一个连接请求已经到达，等待确认
#SYN_SENT：   应用已经开始，打开一个连接
#ESTABLISHED：正常数据传输状态
#FIN_WAIT1：  应用说它已经完成
#FIN_WAIT2：  另一边已同意释放
#ITMED_WAIT： 等待所有分组死掉

yeetim

#!/usr/bin/perl -w

# $Header: /CVSROOT/yahoo/ops/software/hwconfig/hwconfig,v 1.51.2.1 2008/11/06 01:01:10 filo Exp $

use strict 'vars';
use Getopt::Std;
use POSIX;

# constants
$ENV{PATH} = "/etc/bin:/sbin:/usr/sbin:/bin:/usr/bin:/home/y/bin:/usr/local/bin:/usr/local/sbin:/home/opt:/opt/MegaRAID/MegaCli:/usr/StorMan";