digital and streaming videodigital and streaming video: the eccles library digital video studio...
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Digital and Streaming Video:The Eccles Library Digital Video Studio
September 20, 2000
Nancy LombardoSystems LibrarianEccles Health Sciences LibraryUniversity of Utah
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So you want to make digital video? First decision: do you need it? Second decision: who is your audience? Third decision: what is your delivery
method? Fourth decision: what format is most
suitable?
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Digital Video: Necessary? Digital video production is extremely time
consuming Digital video can add value when visual
information is necessary Exam procedures or interview techniques Dissection or surgical procedures Lectures and demonstrations
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Digital Video: Audience! Who are your viewers?
Attention span? Where are your viewers?
On campus - high speed network Off campus - slower connection In classroom - no network connection
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Digital Video: Delivery How will you deliver your video? Internet?
Streamed or not CD-ROM DVD
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Digital Video: format QuickTime (MOV) RealMedia (RM) MPEG (MPG) Windows Media (ASF) Video for Windows (AVI) Others
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QuickTime (.mov) Well suited for Web, CD, or DVD Mac and Windows Interactive features Client is also editing and production tool Streaming capabilities Scalable with “alternate” movies High quality is possible
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RealMedia (.rm) Well suited for Web Mac and Windows Streaming capabilities Scalable Very small files sizes Quality variable
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MPEG (.mpg) MPEG 1, 2, 4 Well suited for CD or DVD Multi-platform Streaming capabilities Medium to very high quality Generally requires high data rates Not good for general Internet use
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Windows Media (.asf) For delivery via Web or CD Streaming capabilities Scalable Scripting features Large file sizes
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Video for Windows (.avi) Best for CD Windows only Large files Medium to high quality No longer supported by Microsoft
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Demonstration Quicktime RealMedia MPEG AVI Comparison
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File sizes for various formats 10 second animation:
RM - 327 KBMOV - 379 KBMPG - 1.3 MBASF - 10 MB
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File sizes for various formats 17 second clip:
RM - 545 KBMOV - 1.5 MB
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File sizes for various formats 2 minute, 50 second clip:
RM - 5.3 MBMOV - 14 MB
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What is “streaming” video? To "stream" video, the client (video player) on the
user's PC continually requests video data from a server
The user does not have to wait for the entire file to download before viewing
View as a continuous data stream Unicast vs multicast - requires network support, router
configuration
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Overview of the digital video creation process
Stored Camera
Tape
Capture
Edit
Compress/Encode
Burn and/or Serve
(On-demand or scheduled)
Live
Camera
Compress/Encode
Serve
Real Time (~1-30 second delay)
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Digital video creation: source GIGO - Garbage in, garbage out Start with highest quality original Ideally, shoot original with digital camera Can encode from 1/2” or 3/4’ VHS
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Digital video creation: capture Requires PC or Mac with video capture card Converts analog video signal to digital signal Requires software - Adobe Premiere,
MovieRecorder Raw capture footage is ENORMOUS!
1 - 20 MB per second Must be compressed (encoded) to deliver
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Digital video creation: edit Requires fast PC or Mac with large storage drive Requires video editing software
Adobe Premiere, Avid Cinema, or Strata's VideoShop Use time line to order clips, add transitions and
effects Export for later compression Archive pre-compression video
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Digital video creation: compress Requires fast PC or Mac with large storage drive Requires video compression software (encoder)
Media Cleaner Pro Select format Set appropriate settings
Very time consuming 1 minute clip - 10 -30 minutes to compress
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Digital video creation: deliver Depending on your needs:
Mount on server and link to Web page Burn to CD to play on your computer Burn to DVD (requires building of interface)
Viewer must have appropriate software (client) to view the video
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DemonstrationSummer Student Projects
Neurologic ExamsIntro exam, Eye ExamNeuroOphthalmology - Eye Movement Disorders
LecturesInfofair 2000
Coming soon:Diabetes education programPatient education workshopClifford Lynch at the Priscilla Mayden Lecture 11/9/00
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Eccles Library Video Studio
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Eccles Library Video StudioSGI WebFORCE Mediabase VideoServer
Real Media Server 7
Minerva VNP 151 Encoder
Canon XLI Digital Video Camcorder
IBM Intellistation Video Editing workstation
Various input devices
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Facilitate Creation of Video ContentGoal: Provide tools for experimenting with video content creation
Create specialized visual contentBroadcast of special events/speakersStoring and Replay events/speakersDistance & Continuing EducationSupplement to existing curriculumOn-demand reviewOther...
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Mediabase Hardware ComponentsSGI Origin 200 serverDual processors 180 MHz w/2 MB CacheRAM: 512 MB172 GB storageApprox 200 hours MPEG-1 video
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Mediabase Software ComponentsIrix OS (Unix)MediaBase 4.0.1Informix - relational database systemNetscape FastTrack ServerRealNetworks G2 server Unlimited streaming capability – actuality, about 100 simultaneous streams
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MediaBase server not currently running
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Minerva VNP 151 Encoder
MPEG Encoding Encode from tape or live camera Real time capture and distribution Web administration tool
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Canon XLI Digital Video Camcorder Interchangeable lens Mini DV camcorder Highly accurate color reproduction and
detail Four Channel Digital Audio System Firewire port for direct video capture from
MiniDV tape to editing station
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RealServer Hardware Components Dell PowerEdge 1300 Dual Pentium III 500MHz w/512K
Cache RAM: 256MB 18GB Storage
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RealServer Software Components Microsoft Windows NT Server 4.0 RealServer 7.0 - Streaming media server
RealProducer - software to prepare streaming audio and video
RealPresenter - converts PowerPoint slides to streaming video and audio
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Video Editing Components - HardwareIBM Intellistation Video Editing Workstation
Video capture card / firewire port
70 GB Disk Array
CD and DVD burners
1/2”, 3/4” VHS player/recorders
Videodisc player
DVC Pro tape player/recorder
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Video Editing Components - SoftwareAdobe Premiere - video editing
Media Cleaner Pro - video compression
Minerva Impression - DVD authoring
Adobe Photoshop - image editing
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Questions?