在哪里?我只在w3c上面看到这句话.....
The HTML5 specification does not require a video codec to be supported by all user agents. Thus, one need to provide alternate sources to ensure proper user experience in the existing user agents.
在哪里?我只在w3c上面看到这句话.....
The HTML5 specification does not require a video codec to be supported by all user agents. Thus, one need to provide alternate sources to ensure proper user experience in the existing user agents. [/quote]
http://www.w3school.com.cn/html5/html_5_video.asp 这个地址