So its seems Goodplayer and other apps were hit by a patent owner. Thus making some codec not functional. The swiss army of video playback.
iOS multimedia player developers forced to remove AC-3 (Dolby Digital) audio support - backup before updating! | Werner Ruotsalainen | iPhone Life
iOS multimedia player developers forced to remove AC-3 (Dolby Digital) audio support - backup before updating! | Werner Ruotsalainen | iPhone Life