Uploadable slides (Re: New Meetecho feature)

Carsten Bormann <cabo@tzi.org> Tue, 20 July 2021 10:26 UTC

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Subject: Uploadable slides (Re: New Meetecho feature)
From: Carsten Bormann <cabo@tzi.org>
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Date: Tue, 20 Jul 2021 12:26:03 +0200
Cc: Working Group Chairs <wgchairs@ietf.org>
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References: <ed50fb77-b946-cbcc-3989-ff7c39812b29@meetecho.com> <04F89DD3-A3A4-402A-92EA-1A1839395FA6@tzi.org> <d9d52dc2-cbac-f832-5e45-2c717795cbcd@meetecho.com>
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Yesterday, at the hackathon kickoff, the slide presentation feature worked great.

One nit is that the resolution of the processed slides is a bit low.
The slides came over at 720x405 (*) PNGs.  While it is generally great that the files are so small (30–50 kB) and use so little network capacity, there were a few slides with images on them that had print that was no longer very well readable.

Maybe this can be notched up one √2, to 1024x576.  Most slides these days are still built to be useful on a 1024xnnn projector.  While this is twice as many pixels as 720xnnn, PNG will probably compress away large parts of that increase.

Grüße, Carsten

(*) if you know about the history of TV, the number 405 makes one think about https://en.wikipedia.org/wiki/405-line_television_system — but that is just a coincidence and would have been only 376i really anyway.