[Esug-list] To improve the quality of the ESUG videos

David Mason dmason at ryerson.ca
Wed Nov 1 08:05:15 EDT 2017


NDI looks cool, except no Linux support, and quite a few ESUG presenters
use Linux, if I remember correctly.

On 31 October 2017 at 13:21, Steven Kelly <stevek at metacase.com> wrote:

> Hi Stef,
>
>
>
> I’ve not used that particular capture card, but a few others certainly –
> from low end to high end, mostly for live streaming of cameras and PC
> screen. I use Livestream Producer and Livestream Studio for that, but they
> are more expensive that vMix and OBS Studio that I recommend below.
>
>
>
> That AV.io HD is pretty high end, but has the possible problem that
> there’s no video output, so you couldn’t put it directly between the
> presenter’s PC and projector. You’d need splitters for whatever inputs you
> might have from the PCs. One option may be if the projector has an output,
> generally VGA, and you could get the signal to capture from there, always
> in the same format regardless of the presenter’s PC. I haven’t tried that
> enough to know how much quality etc. varies.
>
>
>
> How are you recording currently, and with what products?
>
> -          webcam?
>
> -          An SD card in the camera?
>
> -          A video cable from the camera to a video capture card on a PC?
>
> -          Some computer video format sent by the camera to the PC via
> USB/IP?
>
>
>
> If you want to improve the videos, I’d suggest:
>
> -          using the camera to film the speaker rather than the slides.
> The current camera is really suffering trying to record the screen, but
> contrast improves quite a bit when it occasionally films the speaker, e.g.
> here <https://youtu.be/lBxwaUvortA?t=8m26s>.
>
> -          using a capture card as suggested to grab the projector input.
>
> -          using something like vMix <https://www.vmix.com/purchase/> or OBS
> Studio <https://obsproject.com/> on a separate PC to take the audio and
> video inputs and mix them into a stream, which could go live to YouTube.
> (Not so much because I think ESUG should be live, but because it’s less
> time consuming to do the video mixing live at the conference, rather than
> having to mix and upload everything in the evening or after the conference.)
>
> An alternative approach: The cool way to do this these days is to use NDI
> <https://www.newtek.com/ndi> – a fast video codec, that in this case
> could capture the screen on the presenter’s PC (NDI Scan Converter
> <https://www.newtek.com/ndi/tools/>, simple install) and be picked up
> over the (preferably wired) network by the PC used to record the camera.
> Cost: $0, and no fiddling about with extra video cables. The downside is of
> course the install. Mind you, if you had the video PC connected to the
> projector, showing the presenter’s video output as it is received via NDI,
> that means you avoid the normal problems of trying to get each PC working
> with the projector.
>
>
>
> All the best,
>
> Steve
>
>
>
>
>
> *From:* Esug-list [mailto:esug-list-bounces at lists.esug.org] *On Behalf Of
> *Stéphane Ducasse
> *Sent:* Tuesday, October 31, 2017 5:02 PM
> *To:* ESUG Mailing list
> *Subject:* [Esug-list] To improve the quality of the ESUG videos
>
>
>
> Hello Smalltalk Friends
>
>
>
> We would like to improve the capture of screen for the
>
>
>
> I googled a bit after talking with peter uhnak and we could capture the
> screen output (on the way to the
>
> projector).
>
>
>
> https://www.amazon.com/AV-io-HD-video-capture-1080p/dp/
> B00ZH7HRKW?SubscriptionId=AKIAILSHYYTFIVPWUY6Q&tag=
> duckduckgo-osx-20&linkCode=xm2&camp=2025&creative=165953&
> creativeASIN=B00ZH7HRKW
>
>
>
> I would like to know if one of you got experience with such devices.
>
>
>
> Stef
>
>
>
> --------------------------------------------
>
> Stéphane Ducasse
>
> http://stephane.ducasse.free.fr
>
> http://www.synectique.eu / http://www.pharo.org
>
> 03 59 35 87 52
>
> Assistant: Julie Jonas
>
> FAX 03 59 57 78 50
>
> TEL 03 59 35 86 16
>
> S. Ducasse - Inria
>
> 40, avenue Halley,
>
> Parc Scientifique de la Haute Borne, Bât.A, Park Plaza
>
> Villeneuve d'Ascq 59650
>
> France
>
>
>
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