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Chapter 9: Movies, sounds, and 3D
models
The possibilities for Adobe PDFs extend to the richness of multimedia communication. PDFs can include video
clips, digital audio, and 3D models that readers can move, turn, zoom in on, and examine part by part.
Movies and sounds
Play movies and sounds
PDFs can include many types of movie and sound files, including (but not limited to) Flash, QuickTime, MP3,
MPEG, and Windows Media files. These files may be accessed on a page or within a link, bookmark, form field, or
page action. Each movie and sound file includes a play area from which the media can be activated. The play area
typically appears on the PDF page as an image or a rectangle, but can also be invisible.
Note: You must have the necessary hardware and software installed to play the media files.
To help protect your computer from viruses, Reader solicits your approval before playing multimedia files from
unverified sources. You can change this default behavior in the Multimedia Trust preferences.
❖ UsingtheHandtoolortheSelecttool,clicktheplayareaofthemovieorsoundfile.Whenthepointerispositioned
over the play area, it changes to the play mode icon .
Multimedia preferences
You can specify the media player you want to play movies and sounds by choosing Edit > Preferences (Windows) or
Reader > Preferences (Mac OS), and then selecting Multimedia from the left side of the dialog box.
Preferred Media Player Choose the default player that plays media clips from the list of currently installed media
players.
Accessibility Options Specify if you want special features (if available) to appear when media plays, such as subtitles
and dubbed audio. Specify the preferred language for the media, in case multiple languages are available.
Multimedia Trust preferences
In the Multimedia Trust preferences, you can specify whether to play embedded multimedia files in trusted or
nontrusted PDF documents. A trusted document is a document that you approved or that was produced by an author
you approved. By setting your permissions to play multimedia only in trusted documents, you can prevent programs,
macros, and viruses from playing on, and potentially damaging, your computer.
The list of trusted documents and authors is stored internally and can’t be viewed. If you add a certified document
tothelist,boththedocumentandtheauthor’scertificateareaddedtothelistoftrusteddocuments.Alldocuments
that are certified by this author are trusted. (Trusted documents also include PDFs that were created by authors in
your list of trusted identities.)
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