No Sound After Build Snap And Install

snapcraft
1

Hello, new here.

Today i build my first snap app. It’s a simple bash script that plays url via mpv.

name: shelldio
base: core22
version: '4.2.0'
summary: A description of shelldio
description: |
  A brief description of shelldio and its functionality.

grade: stable
confinement: strict

parts:
  shelldio:
    ### Dump Plugin used for dump contents from the specified source.
    plugin: dump
    source: https://github.com/CerebruxCode/shelldio/archive/refs/tags/v4.2.0.tar.gz
    stage-packages:
      - psmisc
      - mpv
      - curl
      - libpulse0
      - libpulse-dev



  shelldio-script:
    ### Nil Plugin used for parts with no source to import
    plugin: nil
    source: .
    override-build: |
      mkdir -p $SNAPCRAFT_PART_INSTALL/bin
      cp $CRAFT_PART_SRC/parts/shelldio/src/shelldio.sh $SNAPCRAFT_PART_INSTALL/bin/shelldio.sh
      chmod +x $SNAPCRAFT_PART_INSTALL/bin/shelldio.sh


apps:
  shelldio:
    command: bin/shelldio.sh
    plugs: 
      - audio-playback  # Add audio-playback plug here
      - network

Whatever i do, i cannot have sound in the application. Need help.

2

Hi ! @JohnGavr .

Did you connect the plug you created audio-playback?

3

That’s not necessary :

mkdir -p $SNAPCRAFT_PART_INSTALL/bin

4

Thanks for your reply.

Yes audio-playback is connected and as i read that plug is auto connected.

5

@JohnGavr ! You’re right. The audio-playback is enabled by default.

6

@JohnGavr , when you do this (from the terminal), what do you obtain ?

pulseaudio --check

7

Pulseaudio is not installed in Ubuntu 23.10.

8

@JohnGavr Install it.

9

You can install pulseaudio via the command :

sudo apt install pulseaudio

10

From Ubuntu 22.10 (if i am correct for the version) ubuntu uses pipewire for sound server.

inxi -A                                                                   ~
Audio:
  Device-1: Intel 7 Series/C216 Family High Definition Audio
    driver: snd_hda_intel
  API: ALSA v: k6.5.0-27-generic status: kernel-api
  Server-1: PipeWire v: 0.3.79 status: active

Why i need to install pulseaudio??

11

Okay @JohnGavr .

if you use pipewire , pulseaudio can be ignored.

What"s the output of the execution of this command :

systemctl --user status pipewire

12

The pipewire service.

● pipewire.service - PipeWire Multimedia Service
     Loaded: loaded (/usr/lib/systemd/user/pipewire.service; enabled; preset: enabled)
     Active: active (running) since Fri 2024-04-19 15:49:47 EEST; 1min 0s ago
TriggeredBy: ● pipewire.socket
   Main PID: 2749 (pipewire)
      Tasks: 3 (limit: 6863)
     Memory: 7.9M
        CPU: 150ms
     CGroup: /user.slice/user-1000.slice/user@1000.service/session.slice/pipewire.service
             └─2749 /usr/bin/pipewire

Apr 19 15:49:47 atlas systemd[2707]: Started pipewire.service - PipeWire Multimedia Service.
13

@JohnGavr ! Well , I see. The service is active.

Maybe you must connect alsa too .

14

I think that i found something. My new snap.yaml file is that

name: shelldio
base: core22
version: '4.2.0'
summary: A description of shelldio
description: |
  A brief description of shelldio and its functionality.

grade: devel
confinement: devmode

apps:
  shelldio:
    command: usr/bin/shelldio
    plugs: 
      - audio-playback  # Add audio-playback plug here
      - network
      - pulseaudio
      - home
      
parts:
  shelldio:
    ### Dump Plugin used for dump contents from the specified source.
    plugin: dump
    source: https://github.com/CerebruxCode/shelldio/archive/refs/tags/v4.2.0.tar.gz
    #override-build: |
     # mkdir -p $SNAPCRAFT_PART_INSTALL/bin
     # cp /root/parts/shelldio/src/shelldio.sh $SNAPCRAFT_PART_INSTALL/bin/shelldio.sh
     # chmod +x $SNAPCRAFT_PART_INSTALL/bin/shelldio.sh
    organize:
      shelldio.sh: usr/bin/shelldio
    stage-packages:
      - mpv
      - curl
      - grep
      - libglu1-mesa
      - freeglut3
      - libcaca0
      - psmisc
      - libpulse0

I try to run snap in --shell

snap run --shell shelldio

and try the mpv command which the bash script runs i take that error

error while loading shared libraries: libpulsecommon-15.99.so: cannot open shared object file: No such file or directory
15

Okay !

You must add the lib libpulsecommon-15.99.so

16

@JohnGavr ! Here the name of the lib in question.

libpulse-dev

17

This is wrong, you do not want the headers but the runtime library … (i.e. not the -dev package)

Also note that libpulse does not install in the standard library search path, you need an environment: entry to adjust LD_LIBRARY_PATH to make it found…

18

How will the *.yaml file look like in this sense.

19
20

Thanks @ogra .

@JohnGavr , you can add this :

apps:
    shelldio:
        environment:
            LD_LIBRARY_PATH: $SNAP/usr/lib/$SNAPCRAFT_ARCH_TRIPLET/pulseaudio:$LD_LIBRARY_PATH