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Are you asking about content handoff (aka casting) or screen mirroring? They operate very differently.
DIAL is used for content handoff.
From: Michael Thomas <mike@xxxxxxxx>
Sent: Tuesday, March 16, 2021 19:17
To: Tim Cappalli <Tim.Cappalli@xxxxxxxxxxxxx>; ietf@xxxxxxxx <ietf@xxxxxxxx>
Subject: Re: media casting cluster*
On 3/16/21 4:14 PM, Tim Cappalli wrote:
I've seen this before, and I'm pretty sure that it's not the whole story. Or maybe it's something more recent?
Mike
If we built such a thing would they come? It's extremely frustrating
that Apple, Google and Amazon all have different proprietary protocols
to cast media from your phone or laptop to a tv or whatever. they all
have interoperability problems because their petty business fueds, and
for users it is a complete nightmare to try to figure out what is going
wrong which happens way too often. Worst of all, is that since it's
proprietary we have no clue what is happening under the hood and
especially what is going on the security front. For example, if I were
to cast at a public venue would I potentially be opening myself up to
some sort of attack? Nobody but them knows and they aren't telling.
Mike
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