No audio playback inside of Pencil2D (audio files import and export correctly)

[timeopochin]

Issue Summary

There is no audio playback or audio scrubbing.

Actual Results

Audio files both import and export correctly.
When playing inside of Pencil2D there is no sound.

Expected Results

There should be audio playback inside of Pencil2D.

Steps to reproduce

1. Import a sound file
2. Press play

System Information

• Pencil2D Version: Development Build Jun 4 2023
  Identical behavour in Version: v0.6.6

• Operating System: Arch Linux
  CPU Architecture: x86_64
  Qt Version: 5.15.9

Observations

I use pipewire-pulse and Pencil2D doesn't actually seem to show up as an audio source in pulsemixer. In most other applications this kind of problem is usually fixed by changing the audio device in the application's settings, but Pencil2D doesn't seem to have a setting for this.

P.S. I discovered Pencil2D recently, and I love it's simplicity, thank you for making this piece of software

[timeopochin]

After some investigating, the issue was fixed by installing qt-gstreamer.

Maybe this should be added as a dependency for linux builds. I will create a new issue for this.