ozthekoder

// A node.js snippet to stream media files to a Chromecast device.

// An ac3 or dts audio stream in matroska containers is transcoded to mp3
// using ffmeg. Seeking using left and right keys won't be available.

var Client                = require('castv2-client').Client;
var DefaultMediaReceiver  = require('castv2-client').DefaultMediaReceiver;
var mdns                  = require('mdns');

ozthekoder

See my DASH-IF presentation from October, 2014:
https://s3.amazonaws.com/misc.meltymedia/dash-if-reveal/index.html#/

1. encode multiple bitrates with keyframe alignment:
   ffmpeg -i ~/Movies/5D2_Portrait.MOV -s 1280x720 -c:v libx264 -b:v 1450k -bf 2 \
     -g 90 -sc_threshold 0 -c:a aac -strict experimental -b:a 96k -ar 32000 out.mp4

   My input was 30 fps = 3000 ms. If it were 29.97, then a GOP size of 90 frames will yield a base segment
   size of 3003 milliseconds. You can make the segment size some multiple of this, e.g.: 6006, 9009, 12012.

ozthekoder

VIDEO_FILE_EXTENSIONS = ['.264',
  '.3g2',
  '.3gp',
  '.3gp2',
  '.3gpp',
  '.3gpp2',
  '.3mm',
  '.3p2',
  '.60d',
  '.787',

ozthekoder

/**
 * Converts an RGB color value to HSL. Conversion formula
 * adapted from http://en.wikipedia.org/wiki/HSL_color_space.
 * Assumes r, g, and b are contained in the set [0, 255] and
 * returns h, s, and l in the set [0, 1].
 *
 * @param   Number  r       The red color value
 * @param   Number  g       The green color value
 * @param   Number  b       The blue color value
 * @return  Array           The HSL representation

ozthekoder

Studying for a Tech Interview Sucks, so Here's a Cheat Sheet to Help

This list is meant to be a both a quick guide and reference for further research into these topics. It's basically a summary of that comp sci course you never took or forgot about, so there's no way it can cover everything in depth. It also will be available as a gist on Github for everyone to edit and add to.

Data Structure Basics

###Array ####Definition:

• Stores data elements based on an sequential, most commonly 0 based, index.
• Based on tuples from set theory.

ozthekoder

" general
m = mark position (eg ma then 'a will go back to that position)
cW/cw = change word
cB/cb = change till begining of word
C = change till end of line (delete from curser to end and go into insert mode)
A = insert at end of line
dd = del line 
D = delete till end of line
I = go into insert mode at begining of line (before first non-whitespace chars)
L = goto bottom of screen 

ozthekoder

1. You have Ghostscript installed, right? Otherwise sudo apt-get install ghostscript
2. This is important and installs the headers (iapi.h etc) which are required but don't come with the default Ghostscript package: sudo apt-get install libgs-dev
3. I also needed sudo apt-get install gs-esp
4. For me the pre compiled version of ImageMagick never accepted Ghostscript, so let's remove it: sudo apt-get --purge remove imagemagick
5. Get the source of ImageMagick, untar it, cd ImageMagick-xx
6. ./configure --with-gslib=yes [and what else you need]
7. Confirm in the output near the bottom gslib yes yes and not gslib yes no
8. make
9. make install
10. Run convert -list configure | grep DELEGATES => DELEGATES bzlib djvu freetype gs jpeg jng jp2 lcms png tiff x11 xml zlib

ozthekoder

//
// Regular Expression for URL validation
//
// Author: Diego Perini
// Updated: 2010/12/05
// License: MIT
//
// Copyright (c) 2010-2013 Diego Perini (http://www.iport.it)
//
// Permission is hereby granted, free of charge, to any person