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Smooth Streaming Technical Overview
John A. Bocharov(jboch@microsoft.com)
Program ManagerMicrosoft Corporation
What is Smooth Streaming?
Cacheable HTTP-based delivery method for video, audio, text, and metadata
Platform-enabling technology for rich user experience and video monetization
Feature in IIS Media Services end-to-end media delivery platform
IIS Media Services Platform
User experience that smoothly scales to true HD
Best quality for the moment given network/CPU
Responsive interactivity (instant start/seek)
Platform to monetize video on the web
User engagement tracking and rich reporting
Technology that scales to your business
Industry-leading scale at lowest cost
Cacheable HTTP to align with Web infrastructure
Features: Smooth Streaming (VOD & Live), Smooth Streaming Client, Advanced Logging, Bit Rate Throttling, Web Playlists
Traditional Streaming• Responsive User
Experience• Bandwidth Use• User Tracking
Progressive Download• Works from a
Web Server• World-wide scale
w/HTTP
Challenges• No cacheability• Separate,
smaller streaming networks
Challenges• Limited User
Experience• User tracking• Bandwidth Use
(20% watched)
Streaming and Prog. Download
●User Tracking●Bandwidth Use●Responsive User ExperienceTraditional Streaming
Progressive Download●World-wide scale w/HTTP●Works from a Web Server
●Separate, smaller streaming networks●No Challenges
Smooth Streaming:Best of both approaches
Traditional Streaming• Responsive User
Experience• Bandwidth Use• User Tracking
Progressive Download• Works from a
Web Server• World-wide scale
w/HTTP
Movie
Media Delivery Approaches
Traditional Streaming
Smooth Streaming
Movie
Progressive Download
Play Seek Pause
Video @ 01:04?Video @ 01:06?
Video @ 01:08?
The "Last Mile" Challenge
Edge Server
The “Last Mile” from Server to Client
Low BandwidthFast CPU
High BandwidthSlow CPU
“Best quality I
can download”
High Bandwidth Fast CPU
“Best quality I
can render”
“Best quality, period ”
Conditions change every second
Adapting Bit Rate in Real-Time
2.4M
…
300K
Bit Rate Heuristics
300K @ 00:00?700K @ 00:02?
2.4M @ 00:04?1.5M @ 00:06?
2.4M @ 00:08?
00:00 00:02 00:04 00:06 00:08300K (start quickly)
700K (good network)2.4M (great network)
1.5M (glitch)2.4M (play on…)
Scaling: Streaming Networks
Edges maintain 1:1 link with each client
Client sends commands: play, pause, seek, etc.
Server sends media packets
Every server must be a streaming server
Typically one tier of edge servers
Streaming capacity limits audience size
e.g. US Presidential Inauguration
Using a Streaming Network
Challenge: Scale(“The Day Live Web Video Streaming Failed Us”)
Media Origin
Media Edges
Scaling: HTTP Networks
Comparatively massive
e.g. Akamai has 36,000 HTTP caches (Source: SmoothHD.com)
Many tiers of HTTP caching used
HTTP caches are everywhere
ISPs
Enterprises
Remote regions
HTTP capacity not a limiting factor
Using an HTTP Delivery Network
HTTP Origin
HTTP Edge
Servers
Remote Region
HTTP Distribution
Servers
ISP
Enterprise
Scaling: Smooth Streaming
Every N seconds is a cacheable object
Makes full use of existing HTTP networks
Adding a media origin enables streaming
Existing caching networks provide fanout
Media-aware caches add incremental value
Not a hard requirement to stream
Using Smooth Streaming
Media Origin
Media Distribution
Servers
Media Edge
Servers
Client-Server Platform Features
Advertising-based monetization
End-to-end platform for seamless ad insertion
Extensible business logic for asset selection
Advanced Logging
Real-time integration for log data
Rich user engagement data to improve ROI
Centralized client logging for large networks
Playback rate control and smooth scrubbing
Summary Getting Started w/Smooth Streaming
Reasons to use IIS Media Services
Light up your Web Site with Media
Give your users the best playback experience
Use platform components to scale and monetize
Start with IIS Media Services today by
Optimizing your Prog. DL content (1.0)
Solving the “Last Mile” w/Smooth Streaming (2.0)
Using Live, Advanced Logging, and Edge Caching (3.0)
Try IIS Media Services at http://iis.net/media
Expression Encoder: http://microsoft.com/expression
Silverlight: http://silverlight.net
Demos and Showcases
http://iis.net/media/experiencesmoothstreaming
http://smoothhd.com
http://www.us.nextcdn.com/Silverlight.htm
© 2008 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market
conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.
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