Mageia forum

After some considerable poking around I have found that a default install of M3 installs
the core release version of FFMPEG. As a result of that many multimedia apps will have
problems with some files, specifically Mpeg4 files. You will have to install the FFMPEG
rpm ver from the Tainted directory in order to get full functionality ( export a video
edit ) from these apps. I've not seen a problem with having both installed at the same
time. They are about the same size. I don't see this so much as a bug but a heads up.

Has always been the case, as tainted is not enabled by default and should not be. And for AAC or some video codecs you often need the tainted version,
which is automatically installed if you enable tainted repo and do an urpmi --auto-update.