When comparing Gnome Music vs MPlayer, the Slant community recommends Gnome Music for most people. In the question“What are the best music players for Linux?” Gnome Music is ranked 28th while MPlayer is ranked 36th.
Ranked in these QuestionsQuestion Ranking
Pro Simple clean and minimal interface
Pro UI design consistent with GNOME desktop environment
Gnome Music is GNOME's default music player. If you use GNOME Desktop Environment, you'll feel familiar with other GNOME Apps like this one.
Pro Open source
Pro System-wide music organizer
Gnome Music automatically seeks and organises your music files throughout your system using Tracker.
Pro Needs no additional codecs
Everything MPlayer needs to play media files is contained within which means no outside codecs are needed.
Pro Easy shortcut keys
Quick skip ahead buttons and other shortcut keys.
Gnome Music needs a tracker daemon running in the background and that thing never loads the music. It takes forever for a huge library to be loaded even if it was previously partially loaded.