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‐Also,becausethefileiscopiedtousers’computers,theycanpassthefileamong
themselves,therebyreducingyourbandwidthcostperviewer.
‐Thedrawbackisthatuserscan’tviewanyportionofthefileuntilthedownloadiscomplete.
Æ
Progressivedownloadfiles
‐Duringprogressivedownload,afileistransmittedthroughstandardwebprotocolssuchasFTP(File
TransferProtocol)orHTTP(HyperTextTransferProtocol),butuserscanviewthepartthathasalready
beentransmittedwhiletheremainderisstilldownloading.
‐Thisformatallowsthecliptofinishdownloadingwhileitisplaying.
‐Notaffectedbythevideoandaudioglitchesassociatedwithreal‐timestreaming.‐However,
progressivedownloadcan’tprovidereliablereal‐timeperformance.
[thewholebufferingthing]
‐Progressivedownloadistheeasiest,cheapest,andmostforgivingtypeofwebvideotoauthorand
deploy.
Æ
Real‐timestreaming.
‐Offersthetraditionalexperienceofseeingthevideoafteronlyafewsecondsofbuffering,butitrisks
imageglitches,poorquality,andlimitingthedataratetothebandwidthavailabletotheclientatthe
timeofviewing.
‐Butprovidesreal‐timeperformanceandrandomaccesstodifferentpartsofthefile.
Choosingacompressionformat
Dependingontheproject,pickingthecorrectformatcanbeaneasyoradifficultdecision.
‐Afteryouchooseaformat,youneedtodeterminetheversionsofplayersthatsupporttheformat.
‐Questionstoaskwhenchoosingaformat:
•Features
•Userbase
•Platforms
Windowsmediaformat