Re: [GnomeMeeting-list] Quickcam 4000 pro + i810 7012 + ALSA problem

[Damien Sandras <dsandras seconix com>]

Le mer 11/08/2004 à 18:52, Zoilo Gomez a écrit :
> I recently purchased 2 Quickcam 4000 Pro's with built-in microphone 
> (USB), and would like to use the built-in microphones.
> 
> I am using kernel 2.4.21 with gnomemeeting-1.0.2. Testing on 2 different 
> PC's, one with built-in Via82xx audio chip, and another one with 
> built-in i810 7012 audio chip. My sound-card is on sound-channel-0, the 
> USB-mic is on sound-channel-1.
> 
> Video is working fine, but the MIC gives me a headache.
>
> My first attempt was to use standard OSS. Things almost work, but there 
> seems to be a sample rate difference problem, resulting in 'chipmonk' 
> sound. However, I can use the Wizard + Audio test, although it results 
> in distorted chipmonk sound.
> 

Yes, the i810 chipset is only able to record at a sample rate different
from the one needed by gnomemeeting, you absolutely need native ALSA
(not OSS emulation or pure OSS).


> Having consulted the mailing lists, I decided to try ALSA instead 
> (alsa-1.0.5a), as ALSA seems to be able to adjust the sample rate. 
> However, now I cannot pass beyond the Audio test in the wizard anymore: 
> 'Failed to open the device / Impossible to open the selected audio 
> device (/dev/dsp1) for recording'. If I ignore this error and make a 
> call, the error is: 'Could not open audio channel from the soundcard for 
> audio transmission'.


Install the gnomemeeting ALSA plugin and use it. Don't use OSS emulation
with ALSA installed, then report back if it works better :)

> 
> All permissions are OK.
> 
> I can record from /dev/dsp1 using 'rec', and I can playback on /dev/dsp 
> using 'play'.
> 
> Here is my /etc/modules.conf:
> ===========================
> alias char-major-10-200 tun
> alias eth0 sis900
> alias eth1 8139too
> alias char-major-116 snd
> alias char-major-14 soundcore
> 
> options sound-slot-0 index=0
> options sound-slot-1 index=1
> 
> alias snd-card-0 snd-intel8x0
> alias sound-slot-0 snd-card-0
> alias sound-service-0-0 snd-mixer-oss
> alias sound-service-0-1 snd-seq-oss
> alias sound-service-0-3 snd-pcm-oss
> alias sound-service-0-8 snd-seq-oss
> alias sound-service-0-12 snd-pcm-oss
> 
> alias snd-card-1 snd-usb-audio
> alias sound-slot-1 snd-card-1
> alias sound-service-1-0 snd-mixer-oss
> alias sound-service-1-3 snd-pcm-oss
> alias sound-service-1-12 snd-pcm-oss
> 
> alias char-major-81 videodev
> above videodev pwc
> alias char-major-81-0 pwc
> =============================
> 
> What can possibly be wrong?
> 
> Z.
> 
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> GnomeMeeting-list gnome org
> http://mail.gnome.org/mailman/listinfo/gnomemeeting-list
-- 
 _      Damien Sandras
(o-     GnomeMeeting: http://www.gnomemeeting.org/
//\     FOSDEM 2003:  http://www.fosdem.org
v_/_    H.323 phone:  callto://ils.seconix.com/dsandras seconix com