TAILIEUCHUNG - macromedia Dreamweaver MX Bible phần 8

Tất cả các hiệu ứng hình ảnh động năng động HTML Dreamweaver sử dụng tính năng Timeline để quản lý kết hợp của phong trào và thời gian. Thời hạn có thể làm nhiều hơn so với di chuyển một lớp trên một trang Web, tuy nhiên. Một thời gian có thể phối hợp một trình bày toàn bộ: bắt đầu | Adding Video to Your Web Page In a world accustomed to being entertained by moving images 50 feet high it s hard to understand why people are thrilled to see a grainy jerky quarter-screen-size video on a Web page. And in truth it s the promise of video on the Web not the current state of it that has folks excited. Many of the industry s major players including Microsoft and Apple are spending big bucks to bring that promise a little closer to reality. QuickTime and RealVideo are the most popular formats on the Web and both are cross-platform. Video can be downloaded to the user and then automatically played with a helper application or it can be streamed to the user so that it plays while it s downloading. This chapter describes the many different methods for incorporating video whether you re downloading an MPEG file or streaming a RealVideo movie into your Web pages through Dreamweaver. Video on the Web It may be hard for folks not involved in the technology of computers and the Internet to understand why the high-tech Web doesn t always include something as low-tech as video. After all television has been around forever right The difficulties arise from the fundamental difference between the two media Television and radio signals are analog and computers are pure digital. Sure you can convert an analog signal to a digital one but that s just the beginning of the solution. The amount of information stored on a regular analog VHS cassette is truly remarkable. Moving that amount of information about in the ones and zeros of the digital world is a formidable task. For example storing the digital video stream from any digital video camcorder uses up storage space at the rate of about 1 gigabyte every 5 minutes and that video is already compressed. Large file sizes also translate into enormous bandwidth problems when you are transmitting video over the Web. To resolve this issue of mega-sized files industry professionals and manufacturers have developed various .

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