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7 3 Preparing The Elements Video
 

7 3 Preparing The Elements Video

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    7 3 Preparing The Elements Video 7 3 Preparing The Elements Video Presentation Transcript

    • Gathering d Preparing G h i and P i Multimedia Elements VIDEO Linda C. Morosko, 2008 The Web Wizard’s Guide to Web Design, James G. Lengel
    • Video Video is not appropriate for every site. pp p y Video requires a lot of bandwidth With more high speed Internet connections – less of a problem Computers are becoming more like TV Networks have shows available for viewing online Linda C. Morosko, 2008 The Web Wizard’s Guide to Web Design, James G. Lengel
    • Video Sources Live sources Shooting video with a digital video camera Existing videotape Digitize, edit and save the data Often you can play the tape into the computer to digitize the data CD-ROM Video Clips Needs to be imported May need editing Web sources Video on the web is typically going to be small and highly compressed – very low quality. Get permission from site owner before using Linda C. Morosko, 2008 The Web Wizard’s Guide to Web Design, James G. Lengel
    • Video Video is a series of frames rapidly displayed – which p y p y gives the user the illusion of motion. Video-editing software will allow you to Adjust Modify Recombine Apply effects Compress p Save in a useable Web format Linda C. Morosko, 2008 The Web Wizard’s Guide to Web Design, James G. Lengel
    • Video Tools Most popular tools: p p Adobe Premier http://www.adobe.com/products/premiere/?ogn=EN_US- gntray_prod_premiere_home gntray prod premiere home Final Cut Pro http://www.apple.com/finalcutstudio/finalcutpro/ Avid http://www.avid.com/ Linda C. Morosko, 2008 The Web Wizard’s Guide to Web Design, James G. Lengel
    • Video Size Video on the Web usually cannot p y full-screen and y play full-motion For most users, the video display size is dependent on bandwidth, PC processor speed, and the video card Linda C. Morosko, 2008 The Web Wizard’s Guide to Web Design, James G. Lengel
    • Video Size The table below illustrates current technology gy standards These standards are for medium-quality video Connection Bandwidth Size (Pixels) Frame Rate 56K Modem 50 kbs 160 x 120 8 DSL or Cable Modem 500 kbs 320 x 240 12 Ethernet 10 MB 640 x 480 4 4 15 5 Linda C. Morosko, 2008 The Web Wizard’s Guide to Web Design, James G. Lengel
    • Frame Rate On TV video plays at 3 frames per second ( p ) p y 30 p (fps) At this rate, the display is smooth Video digitized at 30 fps, is HUGE and takes too long to download Web video is run at 12-15 fps Match the frame rate of your video to the technical y capabilities of your target audience Linda C. Morosko, 2008 The Web Wizard’s Guide to Web Design, James G. Lengel
    • Compression Many more codecs for video than sound y Video must be compressed to flow through the Web Single Frame of video @ 320 x 240 pixels = 76,800 pixels If each pixel’s color is represented by a 16-bit number, that’s 1,228,000 bits of data p frame! , , per At 15 fps, ONE minute of video would send 1,105,920,000 bits of data across the Internet! Whoooooeeee! Linda C. Morosko, 2008 The Web Wizard’s Guide to Web Design, James G. Lengel
    • Video The more a video file is compressed, the lower the p , quality Frame rate and size of the viewing screen affect file size Linda C. Morosko, 2008 The Web Wizard’s Guide to Web Design, James G. Lengel
    • Video Use one of the three main video systems: y Real Player QuickTime Windows Media Wi d M di File Format File Extension Codecs Application Real Player .ram RealVideo Any application, wide range of quality settings QuickTime Movie .mov Sorenson, Cinepak, Any application, wider range of Motion JPEG, H 263 DV JPEG H.263, DV, quality settings others Windows Media .asf Windows Media Any application, wide range of quality settings Linda C. Morosko, 2008 The Web Wizard’s Guide to Web Design, James G. Lengel