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  • 1. INF 385E Intro to IAWenbin Zhang
    Audio & Video
  • 2. Agenda
    The Past & Now
    Uses of Web Audio & Video
    Audio & Video Formats
    Streaming
    Video hosting
    Online music
    Podcast
    Internet TV
    What’s Hot and the Future
  • 3. The Past
    Neilson’s usability guidelines for video and streaming media from 1999
    Didn’t you hate dial-up when it came to audio & video?
  • 4. Now
    On January 6, 2009, Phil Schiller announced that over 6 billion songs had been downloaded since the service first launched on April 28, 2003
    In 2008, Youtube surpassed yahoo and became the 2nd largest search engine; in March2009, YouTube surpassed 100M U.S.Viewers
    Google/YouTube streams 5.5 billion videos/month in the U.S.
    Every single minute, over 20 hours of videos are uploaded to youtube.
    iTunes store’s only 6 years old, and Youtube 4!!
  • 5. How Are Online Audio & Video Used?
    Keeping abreast of trends and news (CNN, MSNBC, ESPN)
    Entertainment in multiple way (Hulu, Youtube, Last.fm)
    Elearning (Instructional, iTunes U, Audible)
    Live communications: Live chat(Skype, Google Talk via VoIP), Video conferencing, etc.
    Marketing & Advertising (pre-roll, post-roll, in-banner video ads; product/service demos)
  • 6. How Are Online Audio & Video Used?
    Multipurpose:
    Edutainment=eLearning + Entertainment (You Suck At Photoshop)
    Advertainment=Advertising + Entertainment (Samsung HD Camera Trick Challenge; Tmobile Dance)
    Etc.
  • 7. Audio & Video Formats
    Containers: tells how the data are stored & can have metadata (FLV, MP4, Quicktime, Ogg)
    Codecs: Coder-decoder/ Compressor-decompressor
    Lossless Audio Formats:
    Uncompressed:AIFF, WAV
    Compressed : FLAC, Monkey’s Audio, Shorten
    Lossy Audio: MP3, AAC, Vorbis(ogg), WMA, RealAudio
  • 8. Comparison of Audio compressions
  • 9. Audio & Video Formats
    Video Formats
    Digital Tape Formats: DV, HDV, AVCHD
    Digital Disc Formats: DVD, Blue-ray Disc
    Lossy Formats: H.264/MPEG-4 AVC, MPEG-4 ASP, RealVideo, WMV
  • 10. Encoder/Transcoders
    Open Source: Format factory, Handbrake.fr, MediaCoder
    Proprietary: Sorenson Squeeze, Apple Compressor, Adobe Media Encoder
  • 11. Streaming
    Before Streaming: Download before playback
    After Streaming: Download as playback
    Progressive Download(On-Demand Streaming): Flash Video, Quick Time Video… Files can be stored on regular Web servers, Using HTTP
    True Streaming(Living Streaming): Live broadcasting, Online Radio… A Streaming media server that executes control, Protocols vary(RTSP, RTP, etc.)
  • 12. Video Hosting
    How to Choose GUC Video Sharing Sites:
    Traffic
    Audience
    File Size , Number &Time Limits
    Compression Quality
    Formats
    Downloadability
    Editing Capabilities
    Ads
    Payments
  • 13. Emebbed Audio & Video
    Wanna Do It Yourself?
    Uploading Your Files to Your Web Server
    Embedding Multimedia Files in HTML by Using Special Tags(See w3school tutorial)
    Embedding Flash Video by Using Dreamveaver
  • 14. Online Video Platform
    Wanna Meet Higher Demand & Have Your Own Youtube-looking Site?
    “White Brand Providers”
    Business Focused: Brightcove, Vzaar
    Consumer Focused: Fliggo
    Open Source Video Sharing: PHPmotion, Plumi (Lunux)
  • 15. Online Music
    Online Digital Music Stores: iTunes Music Store, Amazon Mp3, Rhapsody, Zune Market Place … Largest Amounts of Music, No More than 1$/song
    Internet Radio: Last.fm, Pandora, Shoutcast … All streaming, Little Playback but easy to tune in to your favorite genres
  • 16. Online Music
    Online Music Databases & Search Engines: Internet Archives, Grooveshark…
    Download For Free: Limeware, Rapidlibrary… Free file sharing (especially if you wanna find bootleg records)
  • 17. Podcast
    iPod + Broadcast = Podcast
     Series of digital media files that are released episodically and downloaded through RSS
    Producing: Audacity(Save as MP3)
    Publishing: Find a Host(Web host or Blog), Upload, Generate RSS Reeds, Submit to a Directory(iTunes, Zune, etc.)
    Don’t Forget ID3 Tags
  • 18. Internet TV
    Wed TV: Cnet TV, Rvision3, Adobe TV, G4 … Original, Episodic Shows Distributed Exclusively Online As Opposed to Legacy Broadcast;
    So-called Internet TV: Hulu … in a broader sense, Any Broadcast TV Shows Repackaged for Online Viewing
    P2PTV: BBC iPlayer(UK-based), Reeltime(US-based), PPstream(China-based) … Peer-2-peer application designed to redistribute video streams on a P2P network
  • 19. What’s Hot and The Future
    Online Media Guides or Aggregators: Casttv, Clicker, Ovguide, Fancast …
    Cross-Platform Mass Distribution Services: Blip.tv, Tubemogul
    Instant Video Sharing: 12seconds.tv, Qik, Tokbox
    User Generated Live Streaming: Ustream, Justin.tv
    Content Recognition for Music: Shazam, Midomi
  • 20. Thank You All
    Questions?
  • 21. References
    Wikipedia entries:
    internet radio
    internet television
    Web television
    web series
    P2PTV
    streaming media
    online music store
    comparison of online music stores
    list of streaming media systems
    list of online music databases
    comparison of streaming media systems
    video hosting service
    list of video hosting websites
    comparison of video services
    viral video
  • 22. References
    Podcast
    podcast in plain English
    how to create podcasts
     Compression & Codecs
    Audio file format
    Codec
    Lossless comparison
    Web Video Compression and Codecs
    Streaming:
    http://webstreamer.doit.wisc.edu/StreamTutorial/tutorial6/player.html; http://www.adobe.com/devnet/flash/learning_guide/video/part02.html
    http://www.mediacollege.com/video/streaming/server.htmlhttp://www.streamingmedia.com/article.asp?id=8456&page=1&c=11
    http://www.microsoft.com/windows/windowsmedia/compare/WebServVStreamServ.aspx
    Neilson:
    http://www.useit.com/alertbox/990808.htmlhttp://www.useit.com/alertbox/video.html