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How To Create Spanned Pixel Space

Creating a spanned pixel space is AVP is a very simple process. In this tutorial, we will outline the steps for not only spanning multiple screens but also show a possible use for it.

In this example, we provide step by step instruction that was actually employed at a recent event.
 
The event required that all media playback supply to separate discreet outputs. One for the projection screens and the other to a live webcast. At first, it sounds simple just use a DA. The thing was, the feed going to the webcast required to also show closed captioning was the feed to screens were to be clean. This rules out using a distribution amp.  We needed to run two separate versions of the same video file at the same time. Here is it was set up:
 
How to setup for dueling clips on two outputs, with only one having captioning:
 
1)  Go to Windows Display Settings and make sure that it shows at least three separate displays are shown (for simplicity have the primary desktop display is all the way to the left and the other two are sitting to the left and right of each other. All should be the exact same resolution.) Also, text scaling on ALL displays needs to be set to 100%.
2)  After receiving media from the client ensure each video clip has its matching SRT file. Copy all into your event show folder.
 
NOTE: SRT files are simple text files that contain the actual caption text that will appear on the screen when triggered by the clip’s current time position. This is all handled by one of the filters that is automatically added to the play out the graph. The great thing about this captioning system is the SRT files can be easily edited in a simple text editor without having to re-render the entire video.
 
3)  Select each MP4 file and copy. Then simply paste them into the same folder. You should now have duplicate video files with the word “COPY” added to the file name.
 
4)  Start AV-Playback as usual and create a new playlist.
 
5)  Once the playlist unit is loaded click on the “Output” button.
    
     In this control, right click on the first program display output and select it as the AVP primary.
 
     Now right click on the output to the right of it and select “Span With Primary”. It should now look like this…
    
     Click “Apply/Exit” and wait for the program to refresh.
 
6)  Add the copied version of each clip to the playlist.
 
7)  One at a time perform the following to each base clip in the playlist:
      a)     Click on the Layer button. This will cause a separate data table to appear.
 
 
    b)  Click on the “+Element” link at the bottom left of the layer data table and using the Media Selection Tool select the matching file (one without “Copy” in the file name.) and add it as a layer.
 
    c)  Check the “Sync” box and wait for the program to refresh.
 
8)  Next, align each element so they appear only in their respective display output. The first one (Local projection screen) is without captioning and the second one (Webcast) is with captioning.
 
    a)  Now click program pause. This will cause the clip to show up in program. Manually move the play-head to a point where you can see a visible frame.
    b)  One at a time, click on the base and layer element’s property settings button
 
    c)  Use the geometry controls to left or right justify each clip respectfully.
 
       
 
After you have done each element, base & layer, each should now be filling their respective display outputs.
 
And your confidence monitor will look like this when playing.
 
Now all you have to do press “Kill” to reset each clip to their start point and then press the “Take” button. You are now playing both versions at the same time. It’s that easy!
 
You can use these same steps to add even more outputs and widen the space to even provide a three or four screen output. Just add more layer elements and adjust geometry accordingly.

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