作者nfsong (图书馆我来了)
看板PCSH91_305
标题H.264 Already Won—Makes Up 66 Percent Of Web Videos
时间Sun May 2 11:50:28 2010
http://techcrunch.com/2010/05/01/h-264-66-percent-web-video/
http://zh.wikipedia.org/zh-tw/H.264/MPEG-4_AVC
掰掰flash....
Earlier this week, Steve Jobs kicked the debate about the need for Flash into
high gear, especially for Web video. As he explained, Apple products like the
iPhone and iPad don’t support Flash because although 75 percent of video on
the Web is in Flash ” almost all this video is also available in a more
modern format, H.264, and viewable on iPhones, iPods and iPads.” The next
day, Microsoft weighed in, saying that Internet Explorer 9 would only support
the H.264 codec for HTML video.
So how much video exactly is available in H.264? I asked Encoding.com, which
has encoded 5 million videos over the past year for a variety of Websites and
customers including MTV Networks, WebMD, Brightcove, Nokia, MySpace, and Red
Bull. President Jeff Malkin sent me the chart above, which he believes is
representative of the Web in general, including mobile. As the chart shows,
in the past four quarters, the H.264 format went from 31 percent of all
videos to 66 percent, and is now the largest format by far. Meanwhile, Flash
is represented by Flash VP6 and FLV, which combined represent only 26 percent
of all videos. That is down from a combined total of 69 percent four quarters
ago. So the native Flash codecs and H.264 have completely flipped in terms of
market share (Flash also supports H.264, however, but you don’t need a Flash
player to watch H.264 videos)
Another data point that Steve Jobs mentions: All YouTube videos are available
in H.264, which alone represents 40 percent of all videos on the Web. So
these numbers from Encoding don’t seem so crazy.
All of these codecs and formats can seem like gobbledy gook. Malkin offers
the following to explain the differences:
The formats can be confusing between containers and codecs. FLV is the
Flash container with the old H.263 codec. Flash VP6 is the Flash container
with the VP6 codec. H.264 is a codec that is utilized in a number of
different containers (.FLV, .MP4, .MOV) and on Apple mobile devices and when
deployed by browsers for HTML5. Microsoft just announced that IE will use
H.264 as the default codec for HTML5. And, Google will be soon offering the
VP8 codec as open source which will add another formidable flag in the format
wars.
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