FWIW chromium does client side range requests that in theory would request only the audio. But. the ogg demux reads the other tracks and discards them.<br>A use case I've heard is listening to music videos and discard the video... bit of a bandwidth waste.<div>
<br><div class="gmail_quote">On Tue, May 11, 2010 at 10:17 AM, Ralph Giles <span dir="ltr"><<a href="mailto:giles@thaumas.net">giles@thaumas.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div class="im">On 11 May 2010 04:24, narendra sisodiya <<a href="mailto:narendra.sisodiya@gmail.com">narendra.sisodiya@gmail.com</a>> wrote:<br>
<br>
> It will be very good if HTML5 API specify this. I mean, Say, If we use<br>
> <audio> tag , then It must stream only audio part of the file irrespective<br>
> of the fact that the src field contains a video file.<br>
<br>
</div>I don't think that's a practical option, since the server must<br>
manipulate the file to return an audio-only subset of the data for<br>
there to be any bandwidth advantage. That's not something that the<br>
HTML5 specification, which documents browser behaviour, can describe.<br>
<br>
Note that it's completely possible to use a server-size module or<br>
script to do this, using a query url in the HTML5 media element's src<br>
attribute. It's just part of a custom server config rather than the<br>
HTML5 API. The Media Fragments Working Group at the W3C is currently<br>
working on a standardized syntax for this. See<br>
<a href="http://www.w3.org/2008/WebVideo/Fragments/WD-media-fragments-spec/" target="_blank">http://www.w3.org/2008/WebVideo/Fragments/WD-media-fragments-spec/</a> if<br>
you're interested.<br>
<br>
FWIW,<br>
<font color="#888888"> -r<br>
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