Hello there: I am new here so the question may sound childish to many of you. Many DVD players nowadays have the option of playing different media types like CD-R, CD-RW, DVD-R and DVD-Audio. I am interested in knowing just what kind of file extension it refers to in general. DVD/DVD-R: Audio CD/DVD Audio: CD-R/CD-RW: .mp3, .mpg, .mov? .avi? .wmv? VCD - .mpg, .mov? .avi? .wmv? so anyone can correct me and fill in the rest?