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[Linphone-developers] Mediastreamer could not attach mixer to card

From: Denny Wright
Subject: [Linphone-developers] Mediastreamer could not attach mixer to card
Date: Wed, 10 Feb 2010 11:20:10 -0700
User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv: Gecko/20100111 Thunderbird/3.0.1

Hi all,

I get the following when ms_init() runs.
I found a reference to this error in the archive and it was resolved by editing alsa.conf (or perhaps /etc/asound.conf?)

Unfortunately, I haven't figured out what the edits should be. Does anyone have any suggestions?


ortp-message-Registering all filters...
ortp-message-Registering all soundcard handlers
ortp-message-Card ALSA: default added
ALSA lib conf.c:4600:(snd_config_expand) Unknown parameters 0
ALSA lib control.c:902:(snd_ctl_open_noupdate) Invalid CTL default:0
ortp-warning-Could not attach mixer to card: Invalid argument
ortp-message-Card ALSA: omap3530lv_som added
ortp-message-Card OSS: /dev/dsp added
ortp-message-Registering all webcam handlers
ortp-message-Webcam StaticImage: Static picture added
ortp-message-Loading plugins
ortp-message-Cannot open directory /usr/lib/mediastreamer/plugins: No such file
or directory
ortp-message-ms_init() done

I have an OMAP ARM board with a TI TPS65950 (i.e. TWL4030) and we're only using a portion of the audio channels. Here's some of my ALSA config (the mixer works fine with ALSA). What other information can I provide?

# cat /proc/asound/cards
 0 [omap3530lvsom  ]: twl4030 - omap3530lv_som
                      omap3530lv_som (twl4030)
# aplay -L
    Default Audio Device
    Discard all samples (playback) or generate zero samples (capture)
# amixer controls
numid=4,iface=MIXER,name='Master Playback Switch'
numid=6,iface=MIXER,name='Analog Capture Volume'
numid=3,iface=MIXER,name='DAC2 Analog Playback Volume'
numid=2,iface=MIXER,name='DAC2 Digital Coarse Playback Volume'
numid=1,iface=MIXER,name='DAC2 Digital Fine Playback Volume'
numid=5,iface=MIXER,name='TX2 Digital Capture Volume'


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