chap7-媒体在网页中的使用(英文版)

Chapter7

Media1ObjectivesGetfamiliarwithcommonaudioandvideofiletypesusedontheWeb.AddaudioandvideotoaWebpage.ExplainwhyFlashispopular.UnderstandthekeyFlashconceptssuchastimeline,frames,layers,symbols,instances,library,tweening,action.CreatesimpleFlashanimations.2AudiofiletypesWaveform(WAV)MP3(MovingPictureExpertsGroup–3)WindowsMediaAudio(WMA)MusicalInstrumentalDigitalInterface(MIDI)RealMedia/RealAudio(RM,RA)3VideofiletypesWindowsMediaVideo(WMV)Audio/VideoInterleaved(AVI)MPEGVideo(MPEG,MPG)QuickTimeVideo(MOV)RealMedia(RM)4LinkingtomediaThesure-firewaytoincludemultimediafilesonyoursiteistoprovideahyperlinktothem.Whentheuserclicksonthelink,thebrowserlooksatthefiletypeandlaunchesanexternalplayerapplicationorusesaplug-intoplaythemovieinthebrowserwindow.Whenlinkingtomedia,itisgoodformtoprovideanindicationofthefilesizesothatuserswithslowerconnectionscanmakethedecisionwhethertoclick.5Embeddingmedia<embedsrc="motivational.mov"width="540"height="312“autostart=“false”></embed><objectclassid=“clsid:02BF25D5-8C17-4B23-BC80-D3488ABDDC6B”width=“540”height=“312”codebase=> <paramname=“SRC”value=“motivational.mov”/> <paramname=“AUTOPLAY”value=“false”> <embedsrc="motivational.mov"width="540"height="312“autostart=“false”></embed></object>6WhyisFlashpopularFilesizesaresmall.Itisscalable.Imagequalityishigh.Itusesstreamingtechnology.Integratedaudioandvideo.TheFlashformatiswellsupported.Itisscriptable.Ithasanopenformat.Fontsetsaretransferable.Consistency.7FlashinterfacebasicsToolsStag