Public bug reported:
Binary package hint: ekiga
Hi,
I am now using a Logitech Quickcam Pro 9000 web cam on my Ubuntu Feisty PC.
I used to use a Quickcam Pro 5000. The problem I have is that for the Pro9000,
Ekiga shows severe JPEG artefacts in the LOCAL video whereas the old Pro5000
does not.
I am looking at the local video (i.e. looking at myself) and the picture
is not as good as is used to be. I am not in a call, I'm simply viewing
the captured video images from the webcam in Ekiga. With the Quickcam
Pro 9000 the JPEG compression artefacts (squiggley lines around edges)
are very noticeable! This was not the case with the Pro 5000.
This strong JPEG compression on the local video makes it look quite poor
on the remote end as by then it is squiggly and blocky (the tranmission
adds the usual blocking artefacts in the image.) The combination of
squiggles and blockyness makes the remote image too poor in my opinion,
but it is the local squiggle artefacts that are the most disturbing to
the viewer.
I am not sure what is happening or whether it is with Ekiga or the UVC
driver or both, but if if I run lucview on my webcam the JPEG artefacts
are much less and are hardly noticeable at all. (e.g. with lucview -f
jpg, the default)
So, for some reason Ekiga appears to be telling the uvc driver to use a much
higher JPEG compression (i.e. lower quality) than lucview does for the Quickcam
Pro9000.
But when using Ekiga on my old Quickcam Pro 5000 webcam, the JPEG compression
is less severe, and is a higher quality. (Perhaps Ekiga compresses the Pro9000
images more because they are of higher spatial resolution???)
I have also tried this on Ubuntu Gutsy and the same strong JPEG
artefacts occur in that version of Ubuntu too.
It would be good to be able to have a configurable setting in Ekiga for
the JPEG quality for use with the UVC driver video streaming facility.
(I am NOT talking about the video transmission quality versus frame
rate, I am referring to the local video capture stage.)
Can we have this new feature? i.e. the ability to configure the amount of JPEG
compression on the local video capture in Ekiga? i.e. to be able to set the
JPEG compression quality on the local video (from uvc driver) from within
Ekiga?
(I assume Ekiga would have to interact with the uvc driver somehow to set the
JPEG quality.)
Thanks in advance.
ProblemType: Bug
Architecture: i386
Date: Sat Jan 12 21:58:45 2008
DistroRelease: Ubuntu 7.04
ExecutablePath: /usr/bin/ekiga
Package: ekiga 2.0.3-0ubuntu8
PackageArchitecture: i386
ProcCmdline: ekiga
ProcCwd: /home/will
ProcEnviron:
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
LANG=en_GB.UTF-8
SHELL=/bin/bash
SourcePackage: ekiga
Uname: Linux box 2.6.20-16-generic #2 SMP Tue Dec 18 05:45:12 UTC 2007 i686
GNU/Linux
** Affects: ekiga (Ubuntu)
Importance: Undecided
Status: New
--
LOCAL Video JPEG compression is too high using Logitech Quickcam Pro9000
https://bugs.launchpad.net/bugs/182411
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