[whatwg] <source> media attribute behavior, static or dynamic ?
kornel at geekhood.net
Fri May 11 07:19:08 PDT 2012
On Fri, 11 May 2012 11:24:20 +0100, Simon Pieters <simonp at opera.com> wrote:
> It is not appropriate for choosing between low resolution and high
> resolution, because the environment can change (e.g. the user might
> fullscreen the video after it has begun loading, and want high
> resolution). Also, bandwidth is not available in MQ, but even if it was,
> the user agent is in a better position to determine what is appropriate
> than the author.
> It would be better to have a solution where the user agent is informed
> about which streams are available and what properties they have, and let
> the user and user agent switch streams at will. Maybe this should happen
> on the network layer, keeping the same selected <source> URL.
There is a similar issue with "responsive images" selected for screen
density and available bandwidth. Current proposal floating around uses
<picture><source media="MQ"></picture> and suffers the same problem of MQ
being inappropriate for bandwidth and relies on authors choosing the right
Perhaps there should be an attribute(s) on <source> that describes
properties of the resource, and could be used for both video and images?
regards, Kornel Lesiński
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