I faced the same issue - can not install qtav-players package on Ubuntu 17.10 with "qtdeclarative5-controls-plugin but it is not installable" message.

Same here. It would be nice to get this fixed.

Looks like all the qt5declarative*-plugin packages are transitional dummy packages which can now be safely removed.

Not tested just an educated guess but I think you need to move artful here
https://github.com/wang-bin/QtAV/blob/master/debian/ubuntu.sh#L15
to the end of the list.

And add another sed line here
https://github.com/wang-bin/QtAV/blob/master/debian/ubuntu.sh#L25
to change qtdeclarative5-dialogs-plugin for qml-module-qtquick-dialogs

Try again, should be fixed

No, still not installing, qtdeclarative5-dialogs-plugin is still there.
Can you try second suggestion from paul-h comment ?

It's changed as paul-h suggested. Are you using 17.10? I can only update for ubuntu LTS and latest version.

Yes, 17.10, tested on a clean install. This is what i did:

sudo add-apt-repository ppa:wbsecg1/qtav
sudo apt-get update
sudo apt-get install libqtav libqtavwidgets qml-module-qtav qtav-players

Got same error.

Looking at your commit, it seems that you've only changed line #15 and not line #25 - proposed changing qtdeclarative5-dialogs-plugin (which is missing in 17.10) to qml-module-qtquick-dialogs (if I understood correctly paul-h suggestion, and your commit)

I forgot to replace qtdeclarative5-dialogs-plugin. now fixed