Set blurred background from external api

[Razor1700]

Add setBlurredBackground command to external api

[jitsi-jenkins]

Hi, thanks for your contribution!
If you haven't already done so, could you please make sure you sign our CLA (https://jitsi.org/icla for individuals and https://jitsi.org/ccla for corporations)? We would unfortunately be unable to merge your patch unless we have that piece :(.

[damencho]

In the UI there are two types of blur effects, maybe the function needs to be parametrized to be able to achieve that, wdyt?

[Razor1700]

In the UI there are two types of blur effects, maybe the function needs to be parametrized to be able to achieve that, wdyt?

I don't need it at the moment but it could be an interesting feature. I'll add it when moving the code into virtual-background

[Razor1700]

Parameter to choose blur type added to the method

[damencho]

Maybe I didn't express my self correctly the previous time, we try to remove code out of conference.js and to avoid adding stuff there.

[Razor1700]

Maybe I didn't express my self correctly the previous time, we try to remove code out of conference.js and to avoid adding stuff there.

Oh ok sorry for the misunderstanding. I remove everything from conference.js

[damencho]

Jenkins, test this please.

[damencho]

LGTM. @Razor1700 Would you mind creating a PR adding it to the docs page here: https://github.com/jitsi/handbook/blob/master/docs/dev-guide/iframe-commands.md

Thank you for your contribution.

[Razor1700]

No problem, I'll update the doc
PR done : jitsi/handbook#527