The project is a WIP.
As the application is a WIP, there are no stable packages of the application yet. Once the first stable release is out, you should be able to get it from Flathub.
python3
gtk3
gstreamer
gstreamer-plugins-good
gst-editing-services
gst-transcoder
gst-python
cairo
py3cairo
python-numpy
meson
In order to build and run the Flatpak package you need to install
xdg-desktop-portal
xdg-desktop-portal-gtk
The GNOME 3.30 runtime/sdk is required to build the Flatpak package
flatpak install flathub org.gnome.Sdk//3.30
Then you can build & install it
git clone https://github.com/bilelmoussaoui/Audio-Cutter.git
cd Audio-Cutter/build-aux/flatpak
flatpak-builder --install app com.github.bilelmoussaoui.AudioCutter.json --user
You can run it using
flatpak run com.github.bilelmoussaoui.AudioCutter
meson _build --prefix=/usr
sudo ninja -C _build install