LANGUAGE SWITCHING
RealOne Player users can set preferences for a specific language when they install RealOne Player. They can also change the preference by giving the Tools>Preferences command, then choosing the Content tab. These preferences correspond to codes defined in the systemLanguage attribute.

Sample File	Description	Featured Illustrated	Reference
languageswitch.smil	Semi-transparent French or Spanish subtitles overlay a video if you set your RealOne Player language preference to any variation of French or Spanish.	systemLanguage attribute using multiple clips and inline switching, along with the rn:backgroundOpacity attribute for RealText clips	click here
languageswitch2.smil	Similar to the preceding sample, the subtitles are opaque and display below the video clip.	systemLanguage attribute using multiple clips and inline switching	click here
contextswitch.smil	Different SMIL files play if you set your RealOne Player language preference to French, Spanish, Swedish, or Japanese.	master SMIL file used to switch between referenced SMIL files	click here
smilswitch.smil	The same clip plays, but a different related info page appears if you set your RealOne Player language preference to French, Spanish, Japanese, or Swedish.	systemLanguage attribute on multiple <area/> tags in a <switch/> group	click here

SYSTEM CAPTIONS SWITCHING
Hearing-impaired viewers can set a RealOne Player preference to display captions. The following samples demonstrate several ways to add system captions using RealText. The captions display only when you turn on captions display in the RealOne Player Contents preference (Tools>Preferences>Content).

Sample File	Description	Featured Illustrated	Reference
videocaptions1.smil	RealText captions with a semi-transparent background overlay a video only if the captions preference is on.	systemCaptions attribute and overlaying regions	click here
videocaptions2.smil	RealText captions appear beneath the video. If the captions preference is off, a filler clip appears in place of the captions.	systemCaptions attribute and side-by-side regions	click here
videocaptions3.smil	The video's playback area resizes and includes the captions area only if the captions preference is on.	systemCaptions attribute and multiple layouts in a <switch> group	click here
videocaptions4.smil	Similar to the preceding sample, this sample includes buttons that cycle the captions between three different sizes.	<set/> animation tags that resize the captions region	click here

PLAYER VERSION CHECKING
Using SMIL 1.0 attributes, you can check whether the viewer is using RealOne Player, or RealPlayer 7 or 8. This lets you add SMIL 2.0 features for RealOne Player, while keeping the presentation compatible with RealPlayer 7 and 8.

Sample File	Description	Featured Illustrated	Reference
compatible.smil	In RealPlayer 7 or 8, a video plays. In RealOne Player, a semi-transparent logo overlays the video.	system-required and systemComponent attributes	click here