Hi all,
We are using an Ubuntu 22.04 install with X (not Wayland) on an Intel NUC 11
Pro NUC11TNKi3.
When simply launching a terminal, we can record audio easily, and with success:
ffmpeg -f alsa -i default alsaout.wav
However, we need to launch this as the same user as we used in X, but from a
daemon. We use sudo to become that same user and launch the exact same ffmpeg
command as above.
This results in ffmpeg giving the following error:
[alsa @ 0x5560dc7f9e40] cannot open audio device default (No such file or
directory)
default: Input/output error
In both situations we can run alsamixer with success, and 'arecord -L' shows:
null
Discard all samples (playback) or generate zero samples (capture)
default
Playback/recording through the PulseAudio sound server
samplerate
Rate Converter Plugin Using Samplerate Library
speexrate
Rate Converter Plugin Using Speex Resampler
jack
JACK Audio Connection Kit
oss
Open Sound System
pulse
PulseAudio Sound Server
upmix
Plugin for channel upmix (4,6,8)
vdownmix
Plugin for channel downmix (stereo) with a simple spacialization
usbstream:CARD=PCH
HDA Intel PCH
USB Stream Output
However also in both cases, 'arecord -l' only shows
**** List of CAPTURE Hardware Devices ****
If we use ssh to that same machine, using that same user, it is also working
fine.
We have tried to find any indications what is the cause (like making that user
part of the audio group), but none of it worked.
In previous versions of Ubuntu (LTS), this was no problem at all.
Any hints or ideas are welcome,
Christof
Christof Ameye
CTO
T +32 56 74 50 10
E christof.am...@oscart.eu
oscart.eu
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