Bug 11324

Summary:	Logitech QuickCam Chat doesn't work
Product:	v4l-dvb	Reporter:	David (idht4n)
Component:	webcam	Assignee:	Hans de Goede (jwrdegoede)
Status:	RESOLVED PATCH_ALREADY_AVAILABLE
Severity:	normal	CC:	jwrdegoede
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	2.6.27-rc6	Subsystem:
Regression:	---	Bisected commit-id:

Description David 2008-08-13 13:33:53 UTC

Latest working kernel version: NA
Earliest failing kernel version:
Distribution: Fedora 9
Hardware Environment: i686
Software Environment:
Problem Description: QuickCam doesn't work with ekiga or skype (haven't tried it with anything else).  Same camera used to work when driver outside mainline was installed.

Steps to reproduce: try selecting the QuickCam Chat device in ekiga or skype

ekiga fails like this:
Your driver doesn't seem to support any of the color formats supported by Ekiga.

skype exits.

Comment 1 David 2008-09-10 15:07:05 UTC

FYI, the ID of this camera is 046d:092e.  I've tested it with 2.6.27-rc[3456] with the same results.  This ID is listed in Documentation/video4linux/gspca.txt as a "Logitech QC Elch2".

Comment 2 Hans de Goede 2008-09-11 07:54:32 UTC

Those applications do not work because the cam produces a video format which they do not understand.

This can be fixed by using libv4l, see:
http://hansdegoede.livejournal.com/3636.html?mode=reply

The latest libv4l is available in rawhide, either get it there or download it here:
http://people.atrpms.net/~hdegoede/libv4l-0.4.2.tar.gz

And then:
tar xvfz libv4l-0.4.2.tar.gz
cd libv4l-0.4.2
make
sudo make install PREFIX=/usr
 or:
sudo make install PREFIX=/usr LIBDIR=/usr/lib64 (on x86_64)


Then do:
export LD_PRELOAD=/usr/lib/libv4l/v4l1compat.so
 or on x86_64:
export LD_PRELOAD=/usr/lib64/libv4l/v4l1compat.so

And then (finally) start up ekiga or skype (from the same terminal as where the export was done) to give the cam a try. In a dark room you will want to change the exposure setting use v4l2ucp for this:
http://v4l2ucp.sourceforge.net/

Most opensource applications are being patched to directly use libv4l so that the LD_PRELOAD hack is not necessary, see:
http://www.linuxtv.org/v4lwiki/index.php/Libv4l_Progress

This should fix your problems, so I'm closing this. If you still have trouble feel free to reopen this bug.