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From: Shevek <>
To: Juliusz Chroboczek <>
Cc:, Dave Taht <>
Subject: [Galene] Re: feature: two cameras for galene
Date: Tue, 10 May 2022 17:09:49 -0700	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

Thank you for following up.

In UI terms, I would expect:
Present/Share My ...
--> Window / Tab / Desktop / _Camera_
----> Select the appropriate window/desktop/camera as usual.

where Camera is a new option allowing me to select a v4l2 source instead 
of using screen capture. The presentation source comes in via something 
which (in hardware terms) looks like a camera, but usually isn't, in 
fact, an optical element. In practice, I use an ATEM to composite the 
"presentation" image from various SDI sources, and render it down to a 
single stream entirely in hardware, which then presents as a v4l2 device.

If I'm streaming to an RTMP/RTSP reflector (Youtube, Twitch, Brightcove, 
Vimeo, etc), then I  don't need Galene/Zoom/OBS/GVC at all, as the 
hardware has RT*P support. But if I'm hosting a meeting on a particular 
bidirectional video conference system, then the ability to treat a 
secondary UVC device as a presentation source is an absolute blocker 
(unless I want to render the presenter as a PiP, which detracts from one 
corner of the presentation, and does not give the viewer choice of focus).

Does that help? I can probably make screenshots...


On 5/10/22 15:40, Juliusz Chroboczek wrote:
>>> They're thinking that presentation cannot be a camera feed,
> Having two cameras is not unusual.  At seminars, we sometimes have one
> camera focused on the speaker and one that films
>>> Logging in from two browser tabs in order to speak to an audience and
>>> present slides would be very odd and somewhat backwards.
> We've never encountered this issue, since in our setup the two cameras are
> connected to two distinct computers.  We've also been hoping that
> interfacing with OBS would solve this kind of setup issues, but OBS has
> been slow in doing their WebRTC support, and RTMP doesn't have the right
> features.
> Shevek, what should the UI for that look like?  Open the side menu, click
> « Add secondary camera », a second Present/Unpresent button appears?
> If we develop such a feature, would you be willing to do some testing for us?
> -- Juliusz

  reply	other threads:[~2022-05-11  0:09 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <>
     [not found] ` <>
2022-05-10 21:58   ` [Galene] " Dave Taht
2022-05-10 22:40     ` [Galene] " Juliusz Chroboczek
2022-05-11  0:09       ` Shevek [this message]
2022-05-11  2:13         ` Juliusz Chroboczek
2022-05-11  5:21           ` Shevek
2022-05-11 11:16             ` Juliusz Chroboczek
2022-05-11 11:22               ` Toke Høiland-Jørgensen
2022-05-11  5:57       ` Gabriel Kerneis
2022-05-11  6:06         ` Dave Taht
2022-05-11  8:09     ` T H Panton
2022-05-11  8:19       ` Fabrice Rouillier
2022-05-11 11:26       ` [Galene] Re: whipi [was: two cameras for galene] Juliusz Chroboczek

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