How to: OnTheAir MOS Gateway - Templates and Placeholders

Templates  & Placeholders Playlists are the referenced playlists for OnTheAir MOS Gateway. The two separate playlists have different functionality, but are both offered in one section in the plugin. Templates can be considered user actions. The base playlist item can be an image or video, but the item itself is not relevant or meant to air. OnTheAir MOS Gateway only cares about how the clip has been adjusted. These include:

• Clip attributes such "clip end behaviour", "start transition", etc.
• Timeline actions such as ATEM or MIDI controls, SCTE triggers, routing, or applescripts. 

A perfect example would be cutting to a camera on your ATEM, and simultaneously bringing microphone faders up. The image in the OnTheAir Video playlist is not meant to air, but the actions controlling the external hardware are necessary. In that situation, you can add an image to the templates playlist that would have timeline actions for an ATEM to cut to camera, and a MIDI action for the faders.

As the name implies, the Placeholders playlist treats the video items as placeholders for video content you want to present on air. For instance, a cue for SOT or "sound on tape" is a video item you want to play with no other audio besides the video itself. The user can add a video item to the Placeholder playlist, edit the description to say "SOT". Then in the timeline of that item, add a MIDI action that turns all the microphones off. Save the playlist. In the plugin, there is a separate tab on the right for templates. Clicking that will show both the Templates playlist items, and the Placeholder items. Placeholder items will show up with a purple background indicating their need for a video item. 

When a template or placeholder is double-clicked, it will automatically create a MOS object in the left hand column. Clicking on "Media Files" tab again, users may then drag a video file to the placeholder items, assigning that new video item to play. Dragging a media file to a template item will alert the user that "You cannot replace the Media on a template object."