Hi Aman, I was facing the same sort of issue. This is happening as cmake is not able to read the Phonon4Qt5Config.cmake file. To resolve this:
* Install Phonon4qt5 from source to some directory lets say /path/to/dir for this follow the steps: Step 1:Clone the repo: git clone https://anongit.kde.org/phonon.git --branch master Step 2: mkdir phonon/build Step 3: cd phonon/build Step 4: cmake -DCMAKE_INSTALL_PREFIX=/path/to/dir -DCMAKE_PREFIX_PATH=/path/to/dir -DPHONON_BUILD_PHONON4QT5=ON .. Step 5: make Step 6: make install * Set the Phonon4Qt5_DIR to /path/to/dir in cmake for this run the following command. export Phonon4Qt5_DIR=/path/to/dir * run cmake in the same session of the terminal. Don't just follow these steps try understanding them. There must be a better way and maybe someone will suggest but this will do the trick :) Sorry I was not able to format it correctly. Regards, Vijay Krishnavanshi