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                                                1123
        S E C T I O N H .3                                                Implementation Notes



        9.1, “Multimedia”
         148. The following media formats are recommended for use in authoring
              cross-platform PDF files intended for consumption by Acrobat 6.0.

                                  TABLE H.4 Recommended media types
COMMON EXTENSION COMMON MIME TYPE                      DESCRIPTION

.aiff               audio/aiff                         Audio Interchange File Format

.au                 audio/basic                        NeXT/Sun™ Audio Format

.avi                video/avi                          AVI (Audio/Video Interleaved)

.mid                audio/midi                         MIDI (Musical Instrument Digital Interface)

.mov                video/quicktime                    QuickTime

.mp3                audio/x-mp3                        MPEG Audio Layer-3

.mp4                audio/mp4                          MPEG-4 Audio

.mp4                video/mp4                          MPEG-4 Video

.mpeg               video/mpeg                         MPEG-2 Video

.smil               application/smil                   Synchronized Multimedia Integration Language

.swf                application/x-shockwave-flash      Macromedia Flash

         149. If the CT entry is not present, Acrobat requires a PL entry to be present
              that specifies at least one player that can be used.

        9.2, “Sounds”
         150. Acrobat supports a maximum of two sound channels.

        9.3, “Movies”
         151. Acrobat viewers do not support the value of Aspect.
         152. Acrobat viewers support only the DeviceRGB and DeviceGray color spaces
              for poster image XObjects. For indexed color spaces with a base color
              space of DeviceRGB (see “Indexed Color Spaces” on page 262”), Acrobat
              5.0 viewers incorrectly treat hival as the number of colors rather than the

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