Re: Uploadable slides (Re: New Meetecho feature)

Toerless Eckert <tte@cs.fau.de> Tue, 20 July 2021 14:34 UTC

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Date: Tue, 20 Jul 2021 16:34:36 +0200
From: Toerless Eckert <tte@cs.fau.de>
To: Carsten Bormann <cabo@tzi.org>
Cc: Meetecho IETF support <ietf@meetecho.com>, Working Group Chairs <wgchairs@ietf.org>
Subject: Re: Uploadable slides (Re: New Meetecho feature)
Message-ID: <20210720143436.GC57276@faui48e.informatik.uni-erlangen.de>
References: <ed50fb77-b946-cbcc-3989-ff7c39812b29@meetecho.com> <04F89DD3-A3A4-402A-92EA-1A1839395FA6@tzi.org> <d9d52dc2-cbac-f832-5e45-2c717795cbcd@meetecho.com> <85263C79-5C6A-4283-B45C-CC53A79845DE@tzi.org>
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I had never tried o analyse efffective resolution in meetecho.
How does the resolution of the uploaded slide now (720x405)
compare in your eperience with the resolutions you would
get when live presenting the slides in meetecho ?

Thanks
    Toerless

On Tue, Jul 20, 2021 at 12:26:03PM +0200, Carsten Bormann wrote:
> 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.