VIDEO STREAMING!

Jacqui Perfetti & Sara Lorenz

Definition

Content sent compressed over Internet

Displayed in real time

Downloading vs. Streaming

Saved vs. Deletes while

watching

Long wait time vs. Watch as arrives

How Streaming Video and Audio Works

Server

“True streaming”Specialized application which runs

on Internet

Two Ways

1. Operate own server (purchase/lease)

2. Hosted Streaming Plan

Advantages of Streaming & Servers

Traffic loadsSpeedsLive events

Disadvantages of Streaming & Servers

Playback QualityFull versionShort Videos

HTTP Streaming

Simple, cheapSmall-Medium WebsitesModest Traffic

HTTP Streaming Process

1. Create file

2. Upload to server

3. Hyperlink/ HTML tag

Create Video Streaming File

1. Record

2. Conversion Utility Program or Export

3. Upload

Software

QuickTimeRealMedia

Microsoft Windows MediaAdobe Flash

Buffers

Initial PortionPlays while streaming

Compensates for delays

Codec

Convert between compressed and uncompressed

Reduces bandwith from clip

Protocols

Packet Order “Real Time”

RTPRTSPRTCPHTTPSDP

Web

Agents

Netflix

Hulu

YouTube

Vimeo

Metacafe

Veoh

Delivered from server

How Big Netflix Is

Digital Video MarketStreaming-only Subscription

1/3

Qwikster

From NetflixDVDs and Video

GamesSeparate WebSite

Hulu vs. Other TV Networks

Graph from 2009

Vs. Now

Streaming to iPhone/iTouch

DropboxM Spot Mobile

Movies OrbLive