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To use this option, cameras and their video feeds must match the following conditions:

1. Video cameras should be located back-to-backInstall cameras as close to each other as possible.

2. No more than 3 cameras' feeds can be merged horizontally.
3. The cameras must have:
   1. pixel resolution of no less than 640 * 480;
   2. identical aspect ratio for the high and low bitrate streams;
   3. identical parameters of lenses.
4. You have to synchronize time on all cameras (for example, via NTP protocol).
5. Camera jitter must not result in more than 1% image shift in both directions.
6. The recommended image overlap across adjacent cameras is 20–25 percent of image width.
7. Camera images must be aligned vertically.

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1. Place the cameras horizontally within the layout.
2. Link the corresponding cells to each other (see Linking cells).
   
3. If you need to display a sub-area of the merged video in a separate window, do the following:
   1. Add a dialog board to the layout (see Configure Configuring the Dialog Board).
   2. Configure the panel to display the selected camera.
   3. Link the panel to the merged video.
      
4. Save the layout.

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