[Bug 84783] Re: [feisty] kopete is very slow when using webcam

Thu Nov 8 20:08:26 UTC 2018

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On 2006-10-18T21:35:38+00:00 Xavier Lagraula wrote:

Version:           0.12.2 (compiled from sources, unlike the rest of KDE) (using KDE KDE 3.5.3)
Installed from:    Ubuntu Packages
Compiler:          gcc 4.1.1 
OS:                Linux

I am not sure wether this is really a bug or not, and it is more a "it
doesn't work well" than a "it doesn't work" issue, so I'm filing this
under "wishlist". Anyway, here goes...

I often chat with a far away friend, with MSN 7.5 and a slooow DSL
connection, while I have a 5Mbits/1Mbits one. We use our webcams (which
is the reason I compiled kopete 0.12.2 from sources, as previous
versions would not allow both webcams to be open at the same time).

When receiving her cam, quickly the picture starts lagging. As I am
typing this, I see what she has done in front of her cam HALF AN HOUR
ago. We just timed it. We have been using the cams without interruption
for a little more than an hour. Even though it's still nice to see her
beautiful face on my screen, it does not help being unable to correlate
what she writes to me with her facial expression, which is the very goal
of a webcam after all.

*** Hypothesis #1 ***

Her bandwidth is not high enough to send the frames at the required
rate, even though the negotiated picture quality is way lower than the
one I send. Nothing seems to be implemented to keep the two computers in
sync. Or if it had, then this feature doesn't work. I would expect the
protocol to provide some way of telling "ok, there is too much lag
between the two clients, let's drop the whole "unsent frames" queue and
start anew".

I know that in my case it would be the job of the MSN client to drop the
queue, not of Kopete. And I know that you can't change the design of the
MSN protocol if does not propose such a mechanism. But, well, the issue
might be kopete's fault, for not complaining about the lag for example.
I don't know how it does work under the hood...

*** Hypothesis #2 ***

The displayed framerate on the kopete side is much slower than it
should, and the data is buffered on my side. Big bug. Needs fixin'. Now.
^_^

Anyway, I just wanted to make you aware of the whole issue, even if it
is not a critical one. It does not seem to be a known one if I believe
the result of my searches on this bug tracking system. You may not be
able to do anything about it but well...

Best regards,
  Xavier

Reply at:
https://bugs.launchpad.net/ubuntu/+source/kdenetwork/+bug/84783/comments/0

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On 2006-12-19T21:02:38+00:00 Xavier Lagraula wrote:

I have experimented with other Linux distros since I filled this report,
only to come back to Debian...

We discovered that the behaviour described here had apparently been
fixed: the framerate would occasionally accelerate to prevent lag. The
bad news is that, surprisingly, establishing full duplex video became
difficult, and then impossible. We did not try for a long time, and KDE
went from 3.5.4 to 3.5.5 since, so maybe it works now. Dunno... We shall
try soon.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/kdenetwork/+bug/84783/comments/1

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On 2007-03-07T16:55:50+00:00 lionel.besson wrote:

I can confirm this behavior on Kubuntu edgy with Kopete 0.12.4. But this
only happens for the cam images that i send

Reply at:
https://bugs.launchpad.net/ubuntu/+source/kdenetwork/+bug/84783/comments/7

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On 2008-07-31T06:29:24+00:00 Lameventanas wrote:

This bug is still present in KDE 3.5.9

Reply at:
https://bugs.launchpad.net/ubuntu/+source/kdenetwork/+bug/84783/comments/13

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On 2008-11-24T21:27:06+00:00 Kde-w wrote:

moving this wish to the WLM plugin

Reply at:
https://bugs.launchpad.net/ubuntu/+source/kdenetwork/+bug/84783/comments/14

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On 2018-11-08T14:10:31+00:00 Andrew-crouthamel wrote:

Hi there, sorry for the bad news, but WLM has been discontinued by
Microsoft, so this bug will be closed.

Thank you for helping us make KDE software even better for everyone!

Reply at:
https://bugs.launchpad.net/ubuntu/+source/kdenetwork/+bug/84783/comments/17

** Changed in: kdenetwork
       Status: New => Unknown

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Title:
  [feisty] kopete is very slow when using webcam

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