The build process on Linux for PySide seems to fail to build the QtMulimedia.so. I have been trying to install PySide for Python3.4 64 bit for a couple of days now. After cross comparing with my install on Windows it seems that the build instructions that can be found on the PySide read the docs website (http://pyside.readthedocs.org/en/latest/building/linux.html) fail to create a QtMulitmedia.so file, in the dist-package/Pyside folder. Which is why the module fails to import. Upon finding this flaw I installed the binary packages from the apt-get repository and found that they were also missing the module/so file. The package I installed was (python3-pyside). This bug only seems to affect Linux as my PySide install on Python3.4 on Windows has a QtMultimedia.dll and the import statement succeeds. I attached the output from build following the instructions on the read the docs website.