gtk2 builds a bit more involved (gtk2 used in cingg's lv2 integration, so if one  makes flatpack builds without lv2  it can be simpler, at least for first iteration ?) 

https://discourse.flathub.org/t/mhwaveedit-gtk2-audio-editor-for-flathub/1119

there is mesa/vaapi platforms, so hopefully it can solve vaapi library mismatch on appimage? 

yet copy/pasting between flatpacked instances of cin may not work? 



On Saturday, November 6, 2021, Andrew Randrianasulu <randrianasulu@gmail.com> wrote:
https://opensource.com/article/19/10/how-build-flatpak-packaging

conceptually sounds nearly simple enough to try (because Cin usually builds statically), but sandboxing might give some surprizes....