VDCP two-head player model

The VDCP protocol supports the use of a two-head player model in that two clips may be loaded for playout, as follows:

  • Current clip — The VDCP “preset id” is the current clip.
  • Preview clip — The VDCP “preview preset id” is considered the preview clip. When a play command is received, the preview clip becomes the active clip and begins playing after the preroll time has passed. If a play command has not been issued by the end of the clip, playout stops according to the VDCP end mode settings for that channel (last frame, black, first frame of preview clip).
Related specifications are as follows:
  • A 3D/Video+Key player channel does not support a two-head player model.

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