<div dir="ltr">Hi, IMO hardware related would be more appropriate under display standards<div>Video standards could be more software related, and provide common definitions, for example , allowing exchange of information between applications which produce or consume video frames or streams of frames. </div><div>Some examples I can think of might be</div><div> xdg_colorspace_RGB,</div><div> xdg_colorspace_YUV</div><div><br></div><div>xdg_pixfmt_RGB24</div><div>xdg_pixfmt_YUV420p</div><div>etc</div><div><br></div><div> xdg_gamma_linear</div><div> xdg_gamma_sRGB</div><div> </div><div>xdg_video_width</div><div>xdg_video_height</div><div><br></div><div>I could provide a more full list, but I think if it goes along this route. the starting point has to be what are we setting out to achieve with the standards / definitions, and provide a range of speculative use cases.</div><div><br></div><div>Gabriel (salsaman)</div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, 28 Mar 2024 at 06:07, Pekka Paalanen <<a href="mailto:pekka.paalanen@haloniitty.fi">pekka.paalanen@haloniitty.fi</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">On Wed, 27 Mar 2024 11:45:00 -0300<br>
salsaman <<a href="mailto:salsaman@gmail.com" target="_blank">salsaman@gmail.com</a>> wrote:<br>
<br>
> ISTR that the xdg video standards were never defined, If you need any<br>
> advice or assistance with this, I would be happy to act in an<br>
> advisory capacity if that is called for. I have over 20 years experience of<br>
> developing Free Software video and have been an active participant in<br>
> developing other video / effects standards. I have been a bit our of the<br>
> spotlight recently as I have been busy architecting and implementing the<br>
> core components of the upcoming next gen LiVES 4,0 video application plus<br>
> its accompanying state-of-the-art effects standard)<br>
<br>
Hi,<br>
<br>
what kind of video standards would that be?<br>
<br>
I'm wondering if it would have anything to do with Wayland color<br>
management and HDR:<br>
<br>
<a href="https://gitlab.freedesktop.org/pq/color-and-hdr" rel="noreferrer" target="_blank">https://gitlab.freedesktop.org/pq/color-and-hdr</a><br>
<a href="https://gitlab.freedesktop.org/wayland/wayland-protocols/-/merge_requests/183" rel="noreferrer" target="_blank">https://gitlab.freedesktop.org/wayland/wayland-protocols/-/merge_requests/183</a><br>
<a href="https://gitlab.freedesktop.org/wayland/wayland-protocols/-/merge_requests/14" rel="noreferrer" target="_blank">https://gitlab.freedesktop.org/wayland/wayland-protocols/-/merge_requests/14</a><br>
<br>
Would there need to be any XDG standards to support color managed HDR<br>
desktops, or is the window system support enough?<br>
<br>
I have not much in my mind, but then I've been staring only at the<br>
window system interactions, and haven't seen what else the desktop<br>
ecosystem or applications might need.<br>
<br>
Recommended display calibration and measurement procedures maybe?<br>
<br>
Desktop viewing environment standards?<br>
<br>
Viewing environment measurement?<br>
<br>
They could be as straightforward as referring to a freely available<br>
ITU-R or SMPTE papers or others, if there are suitable ones.<br>
<br>
<br>
Thanks,<br>
pq<br>
</blockquote></div>