1080p dropping to 720 when received on iPad.

[Rupert]

When I am in a 1080p Meeting, and when I am sending 1080p just fine, if I become Active Speaker when an iPad is joined elsewhere in the meeting, or when an iPad Participant pins me, me sending resolution drops to 720p - and all other participants in the meeting see my drop in video quality, from 1080p to 720p, on their desktop clients.

This only happens in Meeting, not Webinar (where I am able to set the "always send 1080p" option)

Does anyone know if this is expected behavior? 

[RajanB]

Hi Rupert, This is expected behaviour.

For 1080p, all users should be capable of 1080p. Otherwise the resolution will drop to 720p.

[Rupert]

But this problem does not occur with cell phones. Having phones in a meeting does not drop the meeting from 1080 to 720.

[RajanB]

Hi Rupert

Sorry for the confusion. To clarify further...

- I should not have said "all users should be capable of 1080p". 

- 720p+1080p can't be sent simultaneously. What it means is that... if x number of users are receiving 1080p and then another user joins in & requests 720p (because this new user is not capable of receiving 1080p), all the other users who were receiving 1080p will now receive 720p.

- 1080p is not currently supported in mobile clients & hence it does not affect 1080p for other users.

[Rupert]

Thanks @RajanB 

What is confusing, then, is why Webinar does not have the same behavior.

With Webinar I am able to set "always send 1080p" - and then the presence of an iPad does not drop anyone to 720.

It would be great if Meeting had this same option.

[RajanB]

Hi Rupert, let me test it & get back to you.

BTW did iPad user join as attendee or panellist/host?

[Rupert]

Hi @RajanB 

Thank you.

We tested with the iPad both as Attendee, and as Panellist. Neither case dropped the Active Speaker down to 720 send - to the Panellists or the Attendees.

We discussed the issue here: https://youtu.be/RTJfbXTZ8q0?t=43

Thanks again.

Rupert

[RajanB · Accepted solution]

 Rupert

I did quite a bit of testing & can confirm your findings. Digging further, it was found that

In Webinar -> iPad is also receiving 1080p & hence all other 1080p participants remain at 1080p

In Meetings -> iPad is, however, receiving 720p & hence all other 1080p participants resolution drops to 720p because Zoom solution won't send 720p & 1080p simultaneously.

The question remains why iPad client is behaving differently for meetings vs webinar.  I would request you to raise a ticket with Zoom support to find the answer. In the meantime, if I do find out something, I'll post the answer.