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Not much free will handle 3000 people in a video chat. It takes quite a bit of bandwidth and/or processing power to receive, merge, and broadcast 3000 video streams at once.
Do all 3000 really need to participate via video in a conference style system? If not then, why not use a live streaming platform instead of a conferencing system? Many have text chat capabilities, just not video except from the streamer.
lectures for about 3000 students
Could I suggest jitsi to them? Can it Handel this much?
I mean Jitsi is just software. It's just a matter of how much the hardware can handle. Streaming a feed to 3k viewers will require some serious hardware.
I tried suggesting such a thing to the nonprofit I volunteer for and I was lambasted so good luck with that.
vital parts of jitsi are not multi-threaded, so a beefy machine with fast single-thread performance will be needed. but the network and bandwidth requirements will probably be an even bigger obstacle. going off their recommendations, it'd be at least 7.5gbps for 720p to 3000 participants.
I've heard good thing about Jitsi, but I haven't used it outside of matrix calls
As far as I know, Matrix is free, and you can use it through many apps who handle this communication protocol. The most well known is Element
If you try to use Matrix for a call with 3000 people you are seriously going to piss off the sysadmin of whatever instance you are on, and those 3000 people are going to end up being permanently banned.
Element mobile client (element x) doesn't even have calls at all
I forgot to mention, I have Element Classic on my mobile, not sure about the X one
Not correct.
I've just checked, and I saw it has the little camera button for videocalls at the top right of the screen. Unless you're talking about phone calls
Not for groups
ElementX does. But it's glitchy. It won't work for this purpose anyway.
What you need is a streaming platform for the video presentation, supported by a separate interactivity, similar to discord chat or something. Have the presenter supported by someone monitoring the feedback.
You do not need a group video call because there is no possible way to accommodate 3000 speakers. If they are just viewers, then streaming is appropriate. Interactivity can be accomplished through text and document uploads.
There are a huge number of options, depending on what kind of an institution you represent and what kind of commitment and membership students have. I have made bespoke set ups for something like this, and it really does depend on the variables.
Maybe Brave Talk? but it's not free for big groups. Although it's cheap: 7 USD/Month. And it doesn't require an account.
Brave Talk is just skinned Jitsi. You can try Mullvad's Jitsi, but good luck with 3k people.
In fact, for 3k people you just can use Youtube Live