List of steps to reproduce (step by step, including full links if applicable):

• Go to one of the following:
  • https://en.wikipedia.org/wiki/File:Beethoven_Piano_Sonata_No._31_(I._Moderato_cantabile_molto_espressivo,_Artur_Schnabel).ogg
  • https://en.wikipedia.org/wiki/File:Beethoven_Piano_Sonata_No._31_(I._Allegro_molto,_Artur_Schnabel).ogg
  • https://en.wikipedia.org/wiki/File:Beethoven_Piano_Sonata_No._31_(III._Adagio_ma_non_troppo,_Artur_Schnabel).ogg
  • https://en.wikipedia.org/wiki/File:Beethoven_Piano_Sonata_No._31_(IV._Fuga,_Allegro_ma_non_troppo,_Artur_Schnabel).ogg
  • https://commons.wikimedia.org/wiki/File:Klaviersonate_Nr._31_As-Dur_op._110_-_I._Moderato_cantabile,_molto_espressivo.ogg
  • https://commons.wikimedia.org/wiki/File:Klaviersonate_Nr._31_As-Dur_op._110_-_II._Allegro_molto.ogg
  • https://commons.wikimedia.org/wiki/File:Klaviersonate_Nr._31_As-Dur_op._110_-_III._Adagio,_ma_non_troppo.ogg
  • https://commons.wikimedia.org/wiki/File:Klaviersonate_Nr._31_As-Dur_op._110_-_IV._Fuga_Allegro,_ma_non_troppo.ogg

What happens?: "Klaviersonate_Nr._31_As-Dur_op._110_-_IV._Fuga_Allegro,_ma_non_troppo.ogg ‎(Invalid Ogg file: Stream Undecodable) " and the "dimensions" (?) in the thumbnail section are "0.0 s (8.83 MB)". While the transcodes sound fine, they are reported to be 0 bps.
What should have happened instead?: My computer can decode the files, so why can't MediaWiki? I'm sure they are slightly dodgy, but clearly not "undecodable".