Avatar is blank in Element Call video rooms

[DoM1niC]

Steps to reproduce

1. Set a Avatar
2. Join a Element Call with Element Web

Outcome

Operating system

Any

Browser information

Desktop

URL for webapp

messenger.3dns.eu

Will you send logs?

No

[robintown]

This happens because the EC widget has no idea what the homeserver URL is, and so it spits out /_matrix/media/r0/thumbnail/example.org/xyz as the image src, with no protocol or domain. We need to thread the homeserver URL through EC into the js-sdk.

[toger5]

But we would need the list of home servers for all participants right? (for me to download the profile picture of a participant from another home server would require to know their domain.
Can the home server domains be reliably obtained by the user id's? (they are available in the widget through the data from the accessible state events?)

[t3chguy]

Can the home server domains be reliably obtained by the user id's?

Yes, using the well-known lookup as specced https://spec.matrix.org/v1.4/client-server-api/#server-discovery

BUT I would advise against this as it'd leak your public IP address to servers other than your own.

[robintown]

@toger5 You shouldn't need to know anything more than the user's own homeserver URL, since the media endpoint will automatically pull files in over federation if it's not yet on your own server