[Bug 26207] Provide a way to check system capabilities required for UHD playback

https://www.w3.org/Bugs/Public/show_bug.cgi?id=26207

Mark Watson <watsonm@netflix.com> changed:

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--- Comment #2 from Mark Watson <watsonm@netflix.com> ---
This is also related to Bug 25092.

A further capability which needs to be checked for UHD (and HDR and 5.1 audio
and in principle for HD) is whether the output device is physically capable of
rendering the content. In some cases devices will downscale / downmix but still
there is no point in downloading and decoding quality higher than that which
can be physically rendered. These things have nothing to do with DRM.

Output protection is not as simple capability that can be queried once: a
device may only attempt to engage output protection when requested in a
license. Even then, whether a failure to engage (a specific level of) output
protection means the content cannot be rendered depends on the license policy
and device capability.

I think we need a mechanism - perhaps based on media queries - which can query
the physical resolution of the video element display area - accounting for
output protection restrictions. Also notifications for when the state of this
query changes.

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Received on Wednesday, 9 July 2014 01:20:47 UTC