On Fri, 11 May 2012 11:24:20 +0100, Simon Pieters <[email protected]> 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
criteria.
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
