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  1. 1. QuickTime QuickTime is Apple's multi-platform, industry-standard, multimedia software architecture. It is used by software developers, hardware manufacturers, and content creators to author and publish a wide range of media. Some of the highlights of QuickTime include: • Well-suited to delivery of media everywhere: WWW, CD-ROM, DVD, broadband, kiosk, presentations • Mac and Windows are equally well supported • Includes powerful interactive capabilities (everything a DVD-Video can do, and much more). • "Movie alternates" allow multiple versions of a movie to be created and automatically selected, to give each user the optimum experience. • Goes beyond audio and video to include synchronized graphics, sound, video, text, music, VR, and 3D media. • Used not only for delivery, but also editing and production • Supported by a vast number of third party tools and technologies World Wide Web Progressive download is best for relatively short, high- quality clips. The file is downloaded via HTTP or FTP at QuickTime is widely used for putting a pre-determined level of quality. The user doesn't have movies on the Web, due to the fact that it to wait for the whole file to download to start watching it. is free, easy to use, has a very large If they have a slow connection, or if the movie was installed base and provides a high level of made at a high data rate, there will be a delay before service. Movies can be delivered via the movie starts playing. progressive download or (new with QuickTime 4) via "true streaming." "True Streaming" is generally best for longer pre- recorded clips or live events. A dedicated server is used QuickTime Streaming uses RTSP to to deliver the video in real time. If the user's connection deliver movies in realtime. A dedicated isn't fast enough, or the network experiences media server is required; one is built into congestion, frames may be dropped in order to Apple's Mac OS X Server, and third-party preserve the realtime playback. One advantage of true servers have been announced by SGI, streaming is that it allows the user to skip ahead -- IBM, and Cisco. useful if you're watching an hour-long lecture! CD-Rom, DVD-Rom, Kiosk/Presentation QuickTime is the dominant architecture for CD-ROM video. It enjoys an impressive market share due to its cross-platform support, wide range of features, and free licensing. QuickTime is used on the vast majority of CD-ROM titles for these reasons. DVD-ROM is quite similar to CD-ROM in many respects, so the same codecs still work fine. There is room for improvement, however, and new codecs are on the way that promise to provide substantially better DVD-ROM playback.
  2. 2. QuickTime is a good choice for kiosks, as it integrates well with Macromedia Director, MPEG, and a range of other technologies. Similarly, QuickTime movies are commonly used for presentations played on portable computers, whether in presentation software like Persuasion, or as stand- alone full-screen movies. Scalability QuickTime offers scalability through its alternate movies feature. At the beginning of playback, the QuickTime Plug-In requests an alternate version according to the settings the viewer has configured in their QuickTime Settings control panel. Developers may create as many alternates as desired while encoding the movie, and specify complex criteria for when particular versions will be displayed. This allows for delivery of content based on: bandwidth of user's connection, playback platform (Mac or Windows), QuickTime version, and (new in QuickTime 4) language or CPU speed. Media Types and File Formats Supported QuickTime supports many media types, including audio, video, text, MPEG, music (a superset of MIDI), curve media (similar to Shockwave Flash), VR (panoramas and objects), and 3D. Supported file types include • Digital Video- DV, M-JPEG, MPEG-1 (Mac only) OpenDML, QuickTime Movie, Video for Windows (AVI) • Audio and Text- MP3*, AIFF/AIFC, AU, AUDIO CD DATA, DV, MPEG Layers 1 and 2, Sound Designer II, System 7 Sound, WAVE • Still Image- BMP, GIF, JPEG/JFIF, Mac Paint, PhotoShop, PNG, PICT, QuickDraw GX Picture, QuickTime Image File, Silicon Graphics Image File, Targa Image File (TGA), TIFF • Animation 3D- 3D Meta File (3DMF), Animated GIF, FLC/FLI, PICS • Other- Text, Standard MIDI, General MIDI, Karaoke *These file formats requiire QuickTime 4 QuickTime Video Codecs Codec Pros Cons Availability (Primary Use) Very slow Very good compression; image Sorenson Video playback Basic version included in QuickTime. Pro version quality at WWW and CD-ROM requirements available from Terran low data higher than rates Cinepak Excellent quality. Well Beta version of codec released Nov 2000. VP3 Codec not suited for Available as component download in QuickTijme WWW and CD-ROM ubiquitous. broadband 5 rates Cinepak Plays on Doesn't work Included in QuickTime CD-ROM older CPUs, well under
  3. 3. generally about 30 gives KBps, slow acceptable compression, image mediocre quality image quality Slightly better than Cinepak Not well suited when to Web data compressin Indeo 3.2 rates, more g "talking Free from Intel CD-ROM color heads" artifacting than video, Cinepak compressio n is a bit faster Excellent Indeo Video image Requires fast Included in QuickTime 3 for Windows (Mac Interactive 4 quality Pentium for version freely available, but slower) CD-ROM (similar to playback MPEG) Good for testing edits, Not generally Video doesn't "top useful for final Included in QuickTime Video out" at delivery higher data rates Lossless at 100%, Animation Files may be produces 2-dimensional quite large at Included in QuickTime smaller files animations 100% quality than the None codec Generally has good image relatively slow quality, Photo-JPEG decompressio works well Photographic still n; limited Included in QuickTime for "slide images usefulness for show" type motion video movies with very low frame rates Component Video Can Not generally Included in QuickTime Video capture improve useful for final capture video delivery frame rate, can help eliminate degradation when used as interim storage
  4. 4. format Requires large amounts of CPU power, At 100% large image quality, MJPEG and/or high image Included in QuickTime 2.5 Video editing frame rate degradation movies don't is minimal play smoothly without special hardware Generates a compresse d image 1/2 Slower Graphics the size of decompressio 2-dimensional the same n than the Included in QuickTime animation image Animation compresse codec d by the Animation codec Lossless, Produces can extend huge files, None the movies usually Included in QuickTime Processing capabilities won't play of other smoothly codecs Not suited for Lossless, multimedia small file video, can't Portable Network sizes, good make images Graphic (PNG) alternative Included in QuickTime as small as Still images for lossless Animation codecs like codec JPEG Majority of systems can't playback Very good MPEG-1 (requires Playback included in QuickTime 3 for Mac image CD-ROM special (Windows support will require QuickTime 5) quality hardware or very fast computer) QuickTime Audio Codecs Codec Pros Cons Availability (Primary Use) QDesign Music Codec Ideal for Not as Basic included in QuickTime 3 progressive-download streaming well-
  5. 5. suited for music over a voice as music modem PureVoic e Even better quality than Doesn't QDesign QDesign Music play back Music 1; Basic included in QuickTime 4, Codec, v2 in adds support Pro version available through Terran Streaming music QuickTim for e3 QuickTime Streaming Good speech Not well- Qualcomm PureVoice reproduction suited for Included in QuickTime 3 Streaming voice over a 14.4K music modem Extremely low playback Relatively IMA requirement high data Included in QuickTime CD-ROM s; works well rates on most samples Excellent audio quality (at Not well MP3 (MPEG Layer 3 Playback included in QuickTime 4, 128kbit/sec), suited for Audio) encoding available through Media Cleaner 4 Pro or relatively low modem Downloadable music Fraunhofer MP3 Encoder playback streaming requirement s Software codecs for video capture cards Codec Comments Media 100 Avid Media Composer (Mac and Windows Each codec allows files to be used without capture NT) hardware Truevision