gnu: mplayer: Add codecs.

* gnu/packages/video.scm (mplayer)[inputs]: Add libass, libmpeg2,
  libvdpau, libx264, opus.

gnu/packages/video.scm

@@ -620,23 +620,28 @@ (define-public mplayer
     (inputs
      `(("alsa-lib" ,alsa-lib)
        ("cdparanoia" ,cdparanoia)
-       ("fontconfig" ,fontconfig)
        ("ffmpeg", ffmpeg)
+       ("fontconfig" ,fontconfig)
        ("freetype" ,freetype)
+;;        ("giflib" ,giflib) ; uses QuantizeBuffer, requires version >= 5
        ("lame" ,lame)
+       ("libass" ,libass)
        ("libdvdcss", libdvdcss)
        ("libdvdnav", libdvdnav)
-       ("libmpg123" ,mpg123)                      ; audio codec for MP3
-;;        ("giflib" ,giflib) ; uses QuantizeBuffer, requires version >= 5
        ("libjpeg" ,libjpeg)
+       ("libmpeg2" ,libmpeg2)
+       ("libmpg123" ,mpg123)                      ; audio codec for MP3
        ("libpng" ,libpng)
        ("libtheora" ,libtheora)
+       ("libvdpau" ,libvdpau)
        ("libvorbis" ,libvorbis)
        ("libx11" ,libx11)
-       ("libxxf86dga" ,libxxf86dga)
+       ("libx264" ,libx264)
        ("libxinerama" ,libxinerama)
        ("libxv" ,libxv)
+       ("libxxf86dga" ,libxxf86dga)
        ("mesa" ,mesa)
+       ("opus" ,opus)
        ("perl" ,perl)
        ("pulseaudio" ,pulseaudio)
        ("python" ,python-wrapper)