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    • Video Terminology
      • Clip: source material for a movie. A clip can be a movie, a still image or an audio file.
      • Frame: basic unit of time
        • NTSC (TV): 30 frames per second (f.p.s.) (29.97 for colour television);
        • motion picture: 24 f.p.s.
      • Digitisation : Capturing information from a video source for use on the computer
    • SMPTE Timecode
      • The Society of Motion Picture and Television Engineers (SMPTE) standard
      • Describes any frame of video in terms of: Hours:Minutes:Seconds:Frames
      • So 01:07:34:16 would be: 1 hour, 7 minutes, 34 seconds and 16 frames
    • “Raw” Formats
      • Different for platforms:
        • QuickTime (MOV) - native to Mac
        • Audio-Video Interleave (AVI) - native to Windows
      • Similar in use and appearance
      • Quicktime has become more flexible and modern (compression, streaming)
      • Special players required to play on opposite platforms
    • Compression
      • Compression: method by which data is restructured or removed to decrease the size of files.
      • Decompression: method by which data is restructured after compression to allow use of the files.
      • CODEC: Compression/Decompression system
    • Why Compress?
      • Video files are typically large
      • Internet is (mostly) a low-bandwidth environment
      • Large amounts of data contained in a video difficult to transmit on the Internet
      • Therefore, compression necessary to move the data effectively
    • Compression Types
      • Lossless compression
        • loses no data but...
        • small size reduction, max 3:1
      • Lossy compression
        • loses information but...
        • much greater compression
    • Compression Formats
      • JPEG: for stills
      • Motion JPEG: a series of still JPEGs
      • MPEG-1:
        • released in November, 1991
        • used with CD-ROMs
        • frame size of 360 x 240 pixels. It has a VHS-like quality.
    • Compression Formats (cont.)
      • "MPEG-1.5":
        • application of MPEG-1 to full-size video
        • "pixel-vision" or "chiclet-vision"
      • MPEG-2:
        • released November, 1994
        • full-motion broadcast video version of MPEG, used by DVD-Video.
      • MPEG-3: never released by the Group.
      • MPEG-4: the HDTV standard
    • MPEG Format
      • Motion Picture Experts Group (MPEG)
        • highly compressed, used on computers and for broadcast applications, MPG extension
        • uses a lossy CODEC
      • The MPEG CODEC uses this method: instead of saying “A VERY DETAILED FRAME OF VIDEO” “A VERY DETAILED FRAME OF VIDEO” “A VERY DETAILED FRAME OF VIDEO” “A VERY DETAILED FRAME OF VIDEO” etc. It says: “A VERY DETAILED FRAME OF VIDEO” - KEYFRAME <identical frame> <almost identical frame> “A VERY DETAILED FRAME OF VIDEO” - KEYFRAME <identical frame> etc.
    • MPEG Stats
      • 30 frames per second
      • Audio - CD-quality with full 44 kHz, 16 bit, Stereo
      • Data rate - 140-170 kilobytes/sec or approximately 10 MB per minute
    • Internet Video Basics
      • Video files on the web are either
        • linked from a page
        • embedded in the page
      • Download time depends on
        • file size
        • connection speed
        • general Internet traffic
    • Basics continued
      • For “raw” video, every user has a copy of the video on their system
      • Most common video formats can be played back on a standard system with correct hardware
      • Some older systems require special hardware for MPEG playback
    • Surf Time! Quicktime and other “raw” video types
    • Incorporating Video Files In Web Pages
      • Standard Link tag: <A HREF=&quot;myvideo.avi&quot;> A video clip</A>
      • EMBED Tag: <EMBED SRC=&quot;myvideo.avi&quot; autostart=&quot;true&quot; width=&quot;176&quot; height=&quot;144&quot;>
    • Streaming Video
      • A number of formats exist today:
        • RealVideo
        • Quicktime Streaming
        • Microsoft MediaStreaming
      • Today we will look mostly at Real
    • A RealVideo Demo http:// ots . utoronto .ca/ audvid /cat.html
    • Creating RealVideo
      • Capture video.
        • Video tape, TV, camcoder, etc.
      • Digitize and edit video.
        • Into a raw (MOV or AVI) format first
      • Encode RealVideo clip.
        • Using RealProducer
      • Deliver RealVideo clip.
        • From web page - linked or embedded
    • Using RealProducer
    • Putting RealVideo on your site
      • Using Wizards in RealProducer
      • Using Dreamweaver
    • Surf Time! RealVideo Sites
    • What is SMIL?
      • The Synchronized Multimedia Integration Language (SMIL)
      • A recommendation from the World Wide Web Consortium (W3C)
      • Allows for the creation of time-based multimedia delivery over the web
      • Based on XML (Extensible Mark-up Language)
    • SMIL
      • Currently supported by RealPlayer G2, other systems are adopting it now (including Quicktime)
      • G2 SMIL includes these media types:
        • RealText
        • RealPix
        • RealAudio
        • RealVideo
        • RealFlash
    • SMIL Examples
      • Sample SMIL File
      • SMIL including Flash animation with synchronized audio and captions
      • SMIL with audio and images created in RealSlideshow
      • Additional Examples
    • RealSlideshow
    • Working on Your Own Site