Re: problem with slow network transmission
On Tuesday, May 26, 2020 4:57 PM, deloptes <deloptes@gmail.com> asked:
> Are you in VPN? this slows down things.
No. Fortunately, I don't need it, because the VPN my employer has doesn't
work with Debian (and Windows users have some trouble too).
> Also what browser you use, cause I'm not sure there is a native webex client
> for linux. You must be using firefox or chrome
I'm using Firefox. I picked up the browser extension for manual installation
here:
https://help.webex.com/en-us/9q0glab/Manually-Install-Cisco-Webex-Meetings-for-Mozilla-Firefox
There's supposed to be an option to use a web app at the time I join a
meeting, but I've never seen that.
On Tuesday, May 26, 2020 5:11 PM, Stefan Monnier <monnier@iro.umontreal.ca>
wrote:
> It seems much more likely that you're hitting a problem in the software
> where the compression used is poorly supported by your client so it
> doesn't make good use of your hardware and does all the decompression in
> an inefficient manner, which your CPU is unable to do in real-time.
I've suspected as much, since other online videos play just fine. Cisco does
say that Debian 8 or later is supported (and I have 9) with Firefox 48 or
later (I have 68).
Thanks.
________________________________________
From: Stefan Monnier <monnier@iro.umontreal.ca>
Sent: Tuesday, May 26, 2020 5:11 PM
To: debian-user@lists.debian.org
Subject: Re: problem with slow network transmission
> What I have been trying a lot is Webex teleconferencing for my job. Those
> all work great, including voice and slideshows, but seem to crash miserably
> (including a loss of sound) if even a single attendant puts up live webcam
> video. Very large conferences that disallow that work fine. We've set up
> test Webex conferences at home, and again sharing a webcam kills it. I
> suppose this could be some specific Webex problem, but I've been imagining
> it's a throughput problem. I have no problem playing online videos, but
> maybe they use smarter compression.
The network bandwidth shouldn't be the issue: the video stream can
fairly easily adapt to whichever bandwidth is available.
It seems much more likely that you're hitting a problem in the software
where the compression used is poorly supported by your client so it
doesn't make good use of your hardware and does all the decompression in
an inefficient manner, which your CPU is unable to do in real-time.
video-conferencing with webcams works just fine even with less than 1Mb/s
(i.e. 120kB/s).
Stefan
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