yas-nyan

Live streaming with HTML5

This document contains collected notes regarding html5 live streaming approaches. I'm trying to understand how to build a system that enables streaming of live video to HTML5 clients. Following content is mainly centered around MPEG-DASH - modern way of dealing with given needs.

Approach 1

To prepare movie.avi from MPEG-DASH streaming we will execute following ffmpeg commands:

> ffmpeg -y -i movie.avi -an -c:v libx264 -x264opts 'keyint=24:min-keyint=24:no-scenecut' -b:v 1500k -maxrate 1500k -bufsize 3000k -vf "scale=-1:720" movie-720.mp4
> ffmpeg -y -i movie.avi -an -c:v libx264 -x264opts 'keyint=24:min-keyint=24:no-scenecut' -b:v 800k -maxrate 800k -bufsize 1600k -vf "scale=-1:540" movie-540.mp4
&gt; ffmpeg -y -i movie.avi -an -c:v libx264 -x264opts 'keyint=24:min-keyint=24:no-scenecut' -b:v 400k -maxrate 400k -bufsize 800k -vf "scale=-1:360" movie-360.mp4

express実践入門

自己紹介

小川充

mitsuruog

extract ova files from an archive

$ tar -xvf vmName.ova

modify ovf for some invalid tag

$ vi vmName.ovf

This is old!

Hey there,

occassionally, people still seem to stumble across this script because it seems it shows up in some search results. Please be aware that I made this script ten years ago, and by now, there is probably a better way to achieve the same result.

Have a nice day!

	# Config for Intel WiFi6 AX201
	ctrl_interface=/var/run/hostapd
	ctrl_interface_group=0

	logger_syslog=-1
	logger_syslog_level=2
	logger_stdout=-1
	logger_stdout_level=1

	ssid=AwesomeWifi

	require("date-utils");
	var exec = require("child_process").exec;
	var process = require("process");

	setInterval(function() {
	exec("fswebcam /tmp/captured_"+cap_timestamp+".jpg", function(err, stdout) {
	//var data = fs.readFileSync("/tmp/captured_"+cap_timestamp"+.jpg").toString("base64");
	});
	});

	### Start HTTP ###

	# Enter rule
	-A ufw-before-input -p tcp --dport 80 -j ufw-http
	-A ufw-before-input -p tcp --dport 443 -j ufw-http

	# Limit connections per Class C
	-A ufw-http -p tcp --syn -m connlimit --connlimit-above 50 --connlimit-mask 24 -j ufw-http-logdrop

	# Limit connections per IP

	"""
	以下の論文で提案された改良x-means法の実装

	クラスター数を自動決定するk-meansアルゴリズムの拡張について
	http://www.rd.dnc.ac.jp/~tunenori/doc/xmeans_euc.pdf
	"""

	import numpy as np
	from scipy import stats
	from sklearn.cluster import KMeans

	#!/bin/bash
	#
	# Do a ping and output results as CSV.
	#
	# [email protected]
	# 2011-12-23
	#

	if [ $# -lt 1 ]; then
	echo "Usage: $0 [--add-timestamp] <ping host>"