I upgraded to Ubuntu 16.04 LTS. But the libqt4-core and libqt4-gui packages are missing.
How could I install them on 16.04?
These libqt4-core and libqt4-gui packages don't exist anymore in Ubuntu 16.04 LTS and newer. They were dummy packages with dependencies to other packages. The following procedure will modify the Vidyo package so it uses working dependencies.
First make sure that all required libqt4 packages not installed by default are installed:
sudo apt install libqt4-designer libqt4-opengl libqt4-svg libqtgui4 libqtwebkit4
Create a script to modify the dependency defined in the package. Use the
videbcontrol script provided here.
Run the script
videbcontrol VidyoDesktopInstaller-ubuntu64-TAG_VD_3_6_3_017.deb that will open the dependencies in a vi editor
Depends: libxss1,libaudio2,libasound2,libqt4-gui (>= 4.8.1), libqt4-network with
Depends: libxss1,libaudio2,libasound2,libqt4-designer,libqt4-opengl,libqt4-svg,libqtgui4,libqtwebkit4,libqt4-network. This creates a file named
VidyoDesktopInstaller-ubuntu64-TAG_VD_3_6_3_017.modified.deb containing the new dependency.
If you don't know vi, once you see the package information
ito get into insert mode
ddto delete the old
ZZto save and quit the change (two upper case z)
Install the Vidyo package by executing the command:
sudo apt install VidyoDesktopInstaller-ubuntu64-TAG_VD_3_6_3_017.modified.deb
Thanks to https://ubuntuforums.org/showthread.php?t=110458 and @chmike These dependencies already have higher versions as I found. It is okay to change the .deb file instead. @bean1975 has a shorter method:
dpkg-deb -x yourfile.deb newdir dpkg-deb --control yourfile.deb newdir/DEBIAN gedit newdir/DEBIAN/control
and change the
libqt4-gui (>= 4.8.1) with
dpkg -b newdir modified.deb
and you can use it now!!!
I found these instructions from the Vidyo website, the easiest to follow. They have worked consistently across a few upgrades.
Linked on Ubuntu section of Launchpad:
You can install a .deb (Debian binary package) using dpkg:
sudo dpkg -i libqt4-core_4.8.6...ubuntu8_amd64.deb