驱动之家[原创] 作者：萧萧 编辑：萧萧　2010-07-01 11:02:56 Loading [投递]

很长一段时间以来，业界激烈探讨在Web视频发布方面，HTML5标签能否取代Flash Player。对于HTML5视频标签，Google持支持态度，旗下视频网站※※※※※※※的大多数视频都可以通过HTML5播放器进行观看，但是 Adobe Flash平台仍然是最主要的视频发布平台。

Google表示：“对HTML5的支持能够将※※※※※※※内容和功能带到那些不支持FlashPlayer的设备上，但是 HTML5并不能满足我们所有的需要。当今，Adobe Flash为※※※※※※※视频发布提供了最好的平台，这也是我们选择Flash Player作为首要视频播放器的原因。”

Google力挺Adobe Flash的理由主要有以下六点：

— 标准视频格式：目前的HTML5视频标签还无法兼容所有平台的浏览器，而Flash则是所有浏览器都支持的一种标准视频格式。

— 稳定视频流：HTML5标准本身所做的只是把视频地址交给客户端，并不能很好的控制缓冲，也无法只获取视频的一部分，而这些Flash都可以实现。

— 内容保护：※※※※※※※对网站的视频并没有所有权，它们属于各自的上传者。对于内容发布者来说，其视频内容需要受到保护，因此需要有Flash平台的RTMPE协议来保证他们的视频不会被窃取并再发布。

— 封装+嵌入：Flash能让其他的网站方便地引用※※※※※※※视频，这其中也包括注释及广告之类的内容。

— 全屏播放：高清视频的全屏播放对访问者来说很重要，FlashPlayer可以提供稳定、安全地控制视频加速实现全屏播放，单纯靠使用HTML还无法实现。

— 摄像头和麦克风输入：每天有很多用户直接使用摄像头或麦克风在浏览器内录制※※※※※※※视频，没有 Flash技术，这只能是空想，在这方面，HTML5还刚刚起步。

Adobe和Apple之间的大战愈演愈烈。

确定、一定以及肯定。

Google has confirmed that Adobe Flash will continue to "play a critical role" on ※※※※※※※, saying the fledgling HTML5 video tag doesn't meet the site's needs.

"It's important to understand what a site like ※※※※※※※ needs from the browser in order to provide a good experience for viewers as well as content creators," reads a Tuesday blog post from ※※※※※※※ software engineer John Harding. "We need to do more than just point the browser at a video file like the image tag does — there’s a lot more to it than just retrieving and displaying a video."

For more than a year, Google has publicly backed HTML5 and other web standards as the future of computing applications. Since January, the company has offered an "experimental" HTML5 player on the site. And it's now encoding videos with its newly open sourced WebM codec, designed to be a royalty-free means of encoding video for use with the HTML5 video tag. But Harding makes it clear that Google has no intention of pulling Flash from the site anytime soon.

The primary problem with HTML5 video, Harding says, is that browser makers have yet to agree on a standard codec. Though Google, Opera, and Mozilla are firmly behind WebM — based on VP8 codec Google acquired when it purchased video compression outfit On2 Technologies — it seems that Apple and Steve Jobs have no intention of making the switch from H.264, the patent-backed codec licensed by the MPEG LA. Meanwhile, Microsoft is sticking with H.264 on its upcoming IE9, though the company says it will allow surfers to use WebM if they install it on their own machines.

You could argue that Google's ongoing Flash support will hamper the progress of HTML5. But at least for the moment, Mountain View is intent on playing both sides. "We’re very happy to see such active and enthusiastic discussion about evolving web standards — ※※※※※※※ is dependent on browser enhancement in order for us to improve the video experience for our users," Harding concludes.
。。。。
"While HTML5’s video support enables us to bring most of the content and features of ※※※※※※※ to computers and other devices that don’t support Flash Player, it does not yet meet all of our needs. Today, Adobe Flash provides the best platform for ※※※※※※※’s video distribution requirements, which is why our primary video player is built with it." ®

小心果粉来跟你急。。。