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#1 Posted : Saturday, June 8, 2019 6:37:27 AM(UTC)

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My use of PTZ control is largely for getting a shot of the current speaker, when faced with a room full of people, or perhaps a panel of experts on a stage. I've recently come up with an idea for automatically creating PTZ presets. I offer it here for consideration.

Assume that the cameras are setup and ready for use, as is the stage/scene.

Step #1: QR codes pages

- Print onto standard A4 or 8.5x11" pages a series of QR codes, one per page.
- Each one is unique to signify a PTZ preset.
- You might wish to have a set corresponding to each camera, if so they could be color coded, or otherwise marked so the related camera can be known.

Step #2: Position the printed pages on the set/stage.

Locate a QR code page at each desired target location on the set.

Step #3: At vMix (presuming such capability is added)

- Set the camera wide to see the entire set.
- Engage the Auto PTZ setup function
- vMix would have the camera locate each QR code in the scene
- Zoom in to a nominal default framing* of each QR code
- Save that position as a preset
- Repeat for each visible QR code

*You'd want some params to define how tight to seek each printed page. Also, H/V offsets so you could compensate for a page being on a chair back with noone yet sitting in the chair.

The result would be a set of PTZ presets that could be manually tweaked to perfection.

I envision two cameras in a large room, a row of 10 chairs on a stage. A printed QR page on the back of each chair. vMix would take only a minute or two create 10 custom PTZ presets for each camera.

The existing web interface would be a great way to recall each of those presets.

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