网页制作教程 作者 赵丰年英文 chap7-media.pptVIP

Chapter 7 Media Objectives Get familiar with common audio and video file types used on the Web. Add audio and video to a Web page. Explain why Flash is popular. Understand the key Flash concepts such as timeline, frames, layers, symbols, instances, library, tweening, action. Create simple Flash animations. Audio file types Waveform (WAV) MP3 (Moving Picture Experts Group –3) Windows Media Audio (WMA) Musical Instrumental Digital Interface (MIDI) RealMedia / RealAudio (RM, RA) Video file types Windows Media Video (WMV) Audio/Video Interleaved (AVI) MPEG Video (MPEG, MPG) QuickTime Video (MOV) RealMedia (RM) Linking to media The sure-fire way to include multimedia files on your site is to provide a hyperlink to them. When the user clicks on the link, the browser looks at the file type and launches an external player application or uses a plug-in to play the movie in the browser window. When linking to media, it is good form to provide an indication of the file size so that users with slower connections can make the decision whether to click. Embedding media embed src=motivational.mov width=540 height=312“ autostart=“false” /embed object classid=“clsid:02BF25D5-8C17-4B23-BC80-D3488ABDDC6B” width=“540” height=“312” codebase=/qtactivex/qtplugin.cab param name=“SRC” value=“motivational.mov” / param name=“AUTOPLAY” value=“false” embed src=motivational.mov width=540 height=312“ autostart=“false” /embed /object Why is Flash popular File sizes are small. It is scalable. Image quality is high. It uses streaming technology. Integrated audio and video. The Flash format is well supported. It is scriptable. It has an open format. Font sets are transferable. Consistency. Flash interface basics Tools Stage Layers Timeline Frames Library Properties Actions Panels That’s all for this chapter! * 在线教务辅导网： 教材其余课件及动画素材请查阅在线教务辅导网 QQ:349134187 或者直接输入下面地址： *