A Synchronizer block synchronizes content, such as video, audio or subtitles, within or across spots. Use cases include:
• A Visitor spot playing audio in sync with a Display spot, for instance using a Locator to connect the spots temporarily for synchronization purposes.
• Two or more Display spots playing synchronized video across those spots, or other content (such as subtitles). These display
spots must then be in the same spot group and must be playing the same block (more below under “Synchronizing Video
Across Multiple Displays”).
• Subtitles playing synchronized to video or audio, on the same spot or on another one (e.g., audio narration appearing as text
on visitor’s phones for the hearing impaired).
The Synchronizer has the following settings:
• Synchronization Source lets you chose to synchronize to a specific property rather than to a Spot in the same group or targeted using a Locator. See under “Sync Source Property” below for more details.
• Play Automatically starts content playback when the Synchronizer appears. Uncheck this if you want to start playback by
other means, such as a button or a task.
• Auto-play Delay specifies how long to wait before starting automatic playback. Normally, you want playback to start right
away (delay set to zero). Adding a small amount of delay can improve the synchronicity at the start when starting content
across multiple Spots.
• Loop Content makes media inside the synchronizer play in a loop. Use this checkbox rather than the Loop checkboxes in
each media block for proper looping within a Synchronizer.
• Local Synchronization should be selected when you intend to synchronize content only within a single spot, rather than
across separate spots. This is often used with the Subtitle block, but can also be used to synchronize multiple video or audio
media within a single spot.
• Sync Source Property specifies a time property to synchronize to. This advanced setting, available only when “Property” is
selected as the Synchronization Source, provides explicit control over the synchronizer’s time source.
In addition to the synchronization aspect, this block also has similar tag matching capabilities as the Tag Selector, often used to
select the proper sound track, or other content, based on the user’s language preference.
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