Vanishing point Viper - issues | Forum

Vanishing point Viper - issues with zoom

Hi, I´ve succesully connected VP Viper to our system. Aximmetry basic calibrator shows me data correctly, but advanced camera calibrator constantly warns me that FOV was changed even if we dont touch on it when we calibrated lenses. We finished calibration with this warning, but it guess what, it doesnt work in aximmetry at all.

Aximmetry shows me that "Profile has missing lens data for some zoom levels" even if its receiving data. Can someone help me? Maybe Eifert@Aximmetry again? :)

Thanks! David

Aximmetry DE Broadcast Edition.

davidrynes

Eifert@Aximmetry

Hi David,

I am guessing you used the Camera Calibrator with a calibration file that was first calibrated using the Basic Calibrator and had some missing zoom levels.

You should try to make a new calibration file in the Camera Calibrator and not use existing ones.

If that doesn't work, how much does your FOV change? You could check it in the Basic Calibrator's preview:

Warmest regards,

davidrynes

Hi Eifert@Aximmetry!

I have successfully completed the lens calibration. The first few feet of focal length are perfect, but by the end the zoom is horribly huge and the fov is unrealistically distorted. Is there any way to manually edit the configuration file? Alternatively, can it be ideally linked to the data sent directly by the curve created in the Vanishing Point program?

My second question is about focus. I have two decoders on the lens. One for focus and one for zoom, but in the input settings I only see an option for the zoom device, not for focus.

We have a total of five cameras with ten decoders, so I need to be able to control both zoom and focus for each one. Is there any way to do this?

Eifert@Aximmetry

Hi David,

You can open the Calibration Profile files with any text editor program. The data is organized into an XML format, you could find the relevant data inside even if you know very little about XML-s.

When doing your calibration in Aximmety Camera Calibrator, you should probably not use the curve created in the Vanishing Point program. That might lead to complications.

You can read the raw Zoom data from a Camera Tracking module using the Zoom Sensor output pin. As I know, this raw data will be offset by the Vanishing Point's curve:

If your two decoders are Vanishing Point, then the Vanishing Point software will send them together and you set that up as one Zoom Device (Encoder) in Aximmetry.
However, to use focus with a Calibration profile in Camera compounds, you need a focus calibration like this: https://aximmetry.com/learn/tutorials/for-studio-operators/basic-lens-calibration-without-lens-distortion/#focus-encoder
More on this and on Zoom Sensor output pin here: https://my.aximmetry.com/post/2138-vanishing-point-viper-encoders-for-focus

Warmest regards,

Vanishing point Viper - issues with zoom

Cookie consent