Re: Open Hardware Camera for Conference Recording
On 2021/01/03 18:04, Sebastian Pichelhofer wrote:
On Fri, Jan 1, 2021 at 9:11 PM Kyle Robbertze <paddatrapper@debian.org
<mailto:paddatrapper@debian.org>> wrote:
Hi Sebastian,
On 2021/01/01 20:46, Sebastian Pichelhofer wrote:
> Dear Deb Conf Video Team
>
> We (www.apertus.org <http://www.apertus.org>
<http://www.apertus.org <http://www.apertus.org>>) are developing open
> hardware and free software cameras and technology and are considering
> advancing one particular platform from a prototype to a hardware
kit to
> produce: AXIOM Micro
> https://wiki.apertus.org/index.php/AXIOM_Micro
<https://wiki.apertus.org/index.php/AXIOM_Micro>
> <https://wiki.apertus.org/index.php/AXIOM_Micro
<https://wiki.apertus.org/index.php/AXIOM_Micro>>
>
> It has an image sensor with slightly above Full HD resolution,
swappable
> lens mount and with two plugin module slots can output HDMI live
video
> and/or raw video over USB3 (still in development).
This looks interesting! My main concern with USB output is the distance
limit. Our current setup uses SDI running to a single capture PC that
does the vision switching. Obviously we could put a capture PC (some
small SoC) next to each camera, it just requires additional changes to
our setup and configuration during events.
With the HDMI live output and a 50$ converter (ala
https://www.blackmagicdesign.com/products/microconverters
<https://www.blackmagicdesign.com/products/microconverters>) we could
basically provide SDI from the camera without developing additional
hardware.
The issue with adapters is that it is one more thing to ship, keep track
of and another single point of failure. Which is why we try avoid them
as much as possible.
A new single SDI output plugin module would also be possible though
(with an ECP5 for example) as our dual 6G SDI plugin module
(https://wiki.apertus.org/index.php/SDI_Plugin_Module
<https://wiki.apertus.org/index.php/SDI_Plugin_Module>) developer is
currently working for AMD and there does not seem to be a chance he will
have time to continue working on it soon :(
That plugin module would work for us, though it is unfortunate that your
developer doesn't have the time to work on it at the moment.
Sending a raw 720p60 stream over ethernet might even be possible
directly with the camera (it only requires 421.875Mbps) and the camera
features Gigabit Ethernet.
A color video stream would triple the required bandwidth so that would
not work...
Btw, would HDMI input on the camera make any sense for capturing the
presentations signal?
For us, no - the cameras are far from the presenter's podium. We use
HDMI2USB opsis boards with a SoC to capture and stream the presentations
back to the Voctomix vision switching PC.
>
> As this camera could be a perfect fit for lecture and conference
> recording we want to learn more about your streaming/recording
setup and
> your requirements and discuss if what we have in mind would be
> interesting to you.
Our current set-up is documented here:
https://debconf-video-team.pages.debian.net/docs/room_setup.html
<https://debconf-video-team.pages.debian.net/docs/room_setup.html>
We currently work at 720p capture at 50 or 60 fps (filming country
dependant) from the cameras, streaming and recording.
Thanks!
What cameras do you use/prefer currently?
IIRC at FOSDEM these were prosumer HD camcorders.
Sony PXW-X70/4k
Is interlacing an issue with these devices?
We always shoot progressive and haven't run into any interlacing issues
that I know of
Cheers
Kyle
--
⢀⣴⠾⠻⢶⣦⠀
⣾⠁⢠⠒⠀⣿⡁ Kyle Robbertze
⢿⡄⠘⠷⠚⠋⠀ Debian Developer
⠈⠳⣄⠀⠀⠀⠀ https://wiki.debian.org/KyleRobbertze
Reply to: