How to stream / pipe audio to a process

[antorsae]

Hi, I got plaincast to work on a headless raspberry pi, after launching and casting audio to it I get:

./bin/plaincast
Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started

could you point me to where I may change the output of plaincast to pipe it to a different process. My goal is to take the audio e.g. in a know format e.g. 44k 24 bit (or 16 bit) 2 ch and pipe it into ecasound https://ecasound.seul.org/ecasound/

Any pointer you could bring would be great.

[aykevl]

It uses MPV (actually libmpv) as a backend. You can see it here:
https://github.com/aykevl/plaincast/blob/master/apps/youtube/mp/mpv.go

Can you try playing a file (any audio file) using mpv and see if that works?

[antorsae]

after installing mpv (it was not installed) I get:

$ mpv noise-51.wav
Warning: mpv was compiled against a different version of libav than the shared
library it is linked against. This can expose subtle ABI compatibility issues
and can lead to misbehavior and crashes.
Playing: noise-51.wav
[libav/demuxer] wav: max_analyze_duration 5000000 reached
[stream] Audio (+) --aid=1 (pcm_s16le)
[ao/alsa] Playback open error: No such file or directory
[ao/oss] Can't open audio device /dev/dsp: No such file or directory
Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started
[ao/jack] cannot open server
AO: [null] 44100Hz stereo 2ch s16
A: 00:00:11 / 00:00:12 (98%)


Exiting... (End of file)

and streaming:

 ./bin/plaincast
Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started

[aykevl]

I would suggest first trying to get normal MPV playback to work the way you want to use it (with ecasound). If that works, I'll take a look what I can do to make it work with plaincast.
EDIT: or does it work already?