Re: [GnomeMeeting-list] Logitech 4000 cameras and gnomemeeting

[Damien Sandras <damien sandras it-optics com>]

Le mar 18/11/2003 à 18:43, sting sting a écrit :
> Thnxs.
> I know about the headset solution (the speakers are for sure
> the cause of the echo) and I am sure it will work, but
> still I want to work with speakers.

It works, you just have echo.

> Even when the distance between camera and speakers is about 1 Meter there is 
> an echo problem.
> Well , I had performed also a test with a usual microphone and the logitech 
> 4000 camera (so the
> recording came for the microphone attached to the soundcard , not from the
> camera mic, on both sides). In that case there was  no echo.
> could it be that the logitech 4000 mic is over sensitive ?

Yes it is very sensitive and records much noise...

> amd if so, Is there a way to make it less sensitive?

None that I'm aware of...

> regards
> sting
> 
> 
> 
> >From: Damien Sandras <damien sandras it-optics com>
> >Reply-To: gnomemeeting-list gnome org
> >To: gnomemeeting-list gnome org
> >Subject: Re: [GnomeMeeting-list] Logitech 4000 cameras and gnomemeeting
> >Date: Tue, 18 Nov 2003 17:37:16 +0100
> >
> >Le mar 18/11/2003  17:27, sting sting a crit :
> > > Thnxs ;
> > > I had installed gnomemeeting on a RedHat 7.3 Linux . (with no patches to 
> >the
> > > kernel)
> >
> >
> >Wow that must be a very old gnomemeeting...
> >
> > > I had tried it with 2 logitech 4000 cameras.
> > > The video is very good.
> > > regarding the Audio Quality:
> > > The audio driver I use is the (kernel original) audio.o
> > > I saw in the kernel log (which is /var/log/messages on RH7.3)
> > > that the audio was recognized as dsp 14,35 which is /dev/dsp2.
> > >
> > > Note: ******the mixer is recognized as 14,16***************** !!
> > >
> > > (and indeed cat /dev/dsp2 yields a binary result and not a "no such 
> >file").
> >
> >That's normal. There is no adequation between the mixer number and the
> >device number. You could have more dsp's than mixers.
> >
> > > So I had configured gnomemeeting recoreder to be /dev/dsp2.
> > > Now regarding the mixer, I have some problem.
> > > when I do cat /dev/mixer0, cat /dev/mixer1 , cat /dev/mixer2, cat
> > > /dev/mixer3 I get
> > > cat: /dev/mixerN : no such file or directory.
> > >
> > > Well, I had tried to enter a blank field in the Recoreder Mixer filed 
> >(it is
> > > possible
> > > in this version of gnomemeeting for RH7.3 , but it is impossiblle on the
> > > later version
> > > for RH9 since there you have to select from a list of mixers in a 
> >combobox).
> > >
> > > The result is that I do have an unbearable echo which become more louder
> > > during time .
> > > (it ends up in something like a loud long beep)
> > > Well , I assume that I should use a mixer and this causes the problem.
> > > Mayne I miss some driver for the mixer ?
> >
> >No, the problem is that your microphone is too near of the speakers and
> >webcam microphones record much noise of the background, so there is the
> >echo. The best solution is to buy a headset (mine costs 10 Euros) and to
> >use it instead of the speakers => no more echo
> >
> > > It seems to mt that somehow I should be able to get results
> > > when performing cat /dev/mixerN (where N is 0 and 2 ?)
> > >
> >
> >I don't know and I'm not using OSS anymore ;)
> >
> > > Truly  this problem is not a gnomemeeting problem but I hope
> > > that somebody  who used logitech 4000 with gnomemeeting
> > > as I am not an audio expert on Linux.
> > > Another question : to make sure : is the Echo Cancelltion option I saw 
> >in
> > > setting
> > > (in the RH9 version) is not relevant when using the logitech 4000 
> >camera?
> > > (is it only relvant
> > > to Quicknet cards? )
> >
> >Yes, only relevant to quicknet cards.
> >
> > > regards,
> > > sting
> > >
> > >
> > >
> > > >From: Damien Sandras <damien sandras it-optics com>
> > > >Reply-To: gnomemeeting-list gnome org
> > > >To: gnomemeeting-list gnome org
> > > >Subject: Re: [GnomeMeeting-list] Logitech 4000 cameras and gnomemeeting
> > > >Date: Tue, 18 Nov 2003 12:40:51 +0100
> > > >
> > > >Hi,
> > > >
> > > >Le mar 18/11/2003  12:29, sting sting a crit :
> > > > > Hello,
> > > > > I have a logitech 4000 camera with a built-in microphone.
> > > > > my question is :
> > > > > did anybody tried this camera with gnomemeeting ?
> > > >
> > > >Plenty of people.
> > > >
> > > > > did it went OK?
> > > >
> > > >Yes.
> > > >
> > > > > and regarding the sound quality - was it  OK?
> > > >
> > > >Yes.
> > > >
> > > > > did he had any echo ? (when hearing the voice with speakers)?
> > > >
> > > >No.
> > > >
> > > > > and in case he had - was there a solution/workaround for this 
> >(besides
> > > > > lowering the volume to a
> > > > > minimim)?
> > > >
> > > >Use a headset.
> > > >
> > > > > regards,
> > > > > sting
> > > > >
> > > > > _________________________________________________________________
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> > > >--
> > > >  _      Damien Sandras
> > > >(o-
> > > >//\     It-Optics s.a.
> > > >v_/_    GnomeMeeting: http://www.gnomemeeting.org/
> > > >         FOSDEM 2004:  http://www.fosdem.org
> > > >         H.323 phone:  callto:ils.seconix.com/dsandras seconix com
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> >  _      Damien Sandras
> >(o-
> >//\     It-Optics s.a.
> >v_/_    GnomeMeeting: http://www.gnomemeeting.org/
> >         FOSDEM 2004:  http://www.fosdem.org
> >         H.323 phone:  callto:ils.seconix.com/dsandras seconix com
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-- 
 _      Damien Sandras
(o-     
//\     It-Optics s.a.
v_/_    GnomeMeeting: http://www.gnomemeeting.org/
        FOSDEM 2004:  http://www.fosdem.org
        H.323 phone:  callto:ils.seconix.com/dsandras seconix com