我想在使用PulseAudio和ALSA的Docker上的Ubuntu 16.04上播放声音。然而,它输出一个错误"Device or resource busy"。我认为这是因为ALSA的默认设备没有设置为PulseAudio声音服务器(注意:它设置为主机Ubuntu上的PulseAudio)。我如何将默认设备更改为它?例如,我可以通过创建~/.asoundrc或修改/etc/pulse/client.conf来实现吗?
重现步骤:
重现步骤:
$ # On the host Ubuntu...
$ aplay -L | head -n9
default
Playback/recording through the PulseAudio sound server
null
Discard all samples (playback) or generate zero samples (capture)
pulse
PulseAudio Sound Server
sysdefault:CARD=PCH
HDA Intel PCH, ALC295 Analog
Default Audio Device
$ aplay /usr/share/sounds/alsa/Front_Center.wav
Playing WAVE '/usr/share/sounds/alsa/Front_Center.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono
$ paplay /usr/share/sounds/alsa/Front_Center.wav # Success
$ # On the Docker container...
$ sudo docker run -it --device /dev/snd ubuntu:16.04 /bin/bash
root@81af4bf99890:/# apt update
root@81af4bf99890:/# apt install alsa-base alsa-utils pulseaudio
root@81af4bf99890:/# aplay -L | head -n10
null
Discard all samples (playback) or generate zero samples (capture)
pulse
PulseAudio Sound Server
default:CARD=PCH
HDA Intel PCH, ALC295 Analog
Default Audio Device
sysdefault:CARD=PCH
HDA Intel PCH, ALC295 Analog
Default Audio Device
root@81af4bf99890:/# aplay /usr/share/sounds/alsa/Front_Center.wav
ALSA lib pcm_dmix.c:1029:(snd_pcm_dmix_open) unable to open slave
aplay: main:722: audio open error: Device or resource busy
root@81af4bf99890:/# paplay /usr/share/sounds/alsa/Front_Center.wav
Connection failure: Connection refused
pa_context_connect() failed: Connection refused
环境
- 主机:Ubuntu 17.04
- Docker:17.09.0-ce
附加说明
在我的环境中,Jess的图片也无法工作。这是一个示例日志。
$ # 当我在主机上播放一些声音时,`jess/spotify`无法播放音乐。 $ sudo docker run -it \ -v /tmp/.X11-unix:/tmp/.X11-unix \ -e DISPLAY=unix$DISPLAY \ --device /dev/snd \ --name spotify \ jess/spotify Gtk-Message: Failed to load module "canberra-gtk-module" libGL error: MESA-LOADER: failed to retrieve device information libGL error: Version 4 or later of flush extension not found libGL error: failed to load driver: i915 libGL error: failed to open drm device: No such file or directory libGL error: failed to load driver: i965 [1115/043835.051841:ERROR:sandbox_linux.cc(344)] InitializeSandbox() called with multiple threads in process gpu-process. [1115/043840.945653:ERROR:web_plugin_impl.cc(38)] Widevine registration is not supported after context initialization (spotify:1): GLib-GIO-CRITICAL **: g_dbus_connection_send_message: assertion 'G_IS_DBUS_CONNECTION (connection)' failed ALSA lib pcm_dmix.c:1052:(snd_pcm_dmix_open) unable to open slave
最后一行表示与ALSA相关的错误。(请注意,当没有其他软件播放声音时,
jess/spotify
可以播放音乐。这可能是因为在这种情况下声音设备没有被占用。)- 虽然我自己回答了这个问题,但我仍想要更复杂的解决方案或对需要某些选项的原因进行详细解释。任何评论都将不胜感激。谢谢。
--device /dev/snd
。 - nekketsuuu