I use UbuntuStudio 18.04.1 LTS and Parole 1.0.1.
Some kind of 4K UltraHD videos I had downloaded from YouTube, produce the following effect:
Parole asks me for extra software to decode MPEG-4 AAC.
Then Parole tells me that it can be possible to install it from the Ubuntu Software Center, what is open inmediately.
BUT... All the possible software (GStreamer Multimedia Codecs) to perform the decoding action are already installed!
How can I fix this?