Sender-side metadata capture support (PTZ receiver)

[TheLLspectre]

Hi !

We tried to use this package and it's awesome and work perfectly with our NDI camera.

But also we have a NDI keyboard to use a PTZ on thoses camera. We want to receive value from inputs on this keyboard to interact with Unity also. (it's a birdDog keyboard if you want to know).

How i can use or search in script to receive values from the keyboard

I'm currently discover klak NDI scripts waiting for the answer.

Thanks ;)

[keijiro]

Sorry but I have never heard about "NDI keyboard".

Let me start with a simple question... What is "NDI keyboard"?

[TheLLspectre]

That's probably a bad explanation on my part. ^^
It's a PTZ keyboard and it have an NDI/IP communication.
This one : https://www.bird-dog.tv/ptzkeyboard-overview/

[keijiro]

Thanks for the information. That's an interesting device.

I did a little research, and I realized that it requires the sender-side metadata capturing function (NDIlib_send_capture). I have already added basic metadata features in the latest update, but this one is not yet.

I'll add this function in a future update, but please don't expect this to happen timely. The PTZ Keyboard is too expensive for my budget. I have to invent a trick to implement it without a real device.

[TheLLspectre]

May be I can help you ! I have to work on functionnality with PTZ keyboard and NDI Camera. And i'm a Unity Game Developper. So i have a PTZ keyboard to work on !

[keijiro]

Please let me remind you that this wouldn't happen very soon. I'm busy at other projects at the moment. If you need an instant solution right now, please look for a specialist who can solve the problem.

[TheLLspectre]

Don't worries. I have to work on this one so I just we can exchange on it with the time.

[benwager]

You need to implement NDIlib_recv_send_metadata, NDIlib_recv_free_metadata, and NDIlib_send_capture, as per the NDIlib_Send_VirtualPTZ example in the SDK, as well as creating a struct for MetadataFrame.

I actually have a fork I'm working on where I'm about to add this. However, it also contains quite some changes to the current Klak implementation, for instance running _recv.Capture on a separate thread.

I'll let you know when I push and point you in the right direction, maybe you can strip out the bits you need.

[benwager]

benwager@667a96b

Take a look at this commit. It implements send_send_metadata also, but you are probably more interested in NDIlib_recv_send_metadata and NDIlib_send_capture.

Hope it helps!

[TheLLspectre]

benwager@667a96b

Take a look at this commit. It implements send_send_metadata also, but you are probably more interested in NDIlib_recv_send_metadata and NDIlib_send_capture.

Hope it helps!

Well nice ! I will check that ! Currently I add some functionnality on camera's PTZ like zoom speed and pan tilt speed, based on what KlakNDI implement. Add affect those on a gamepad. (The keyboard has gone to work today and tomorrow ^^)

[darktable]

The PTZ Keyboard is too expensive for my budget. I have to invent a trick to implement it without a real device.

The free NDI Studio Monitor app for Windows can control PTZ cameras. I believe there's an onscreen joystick and it will also work with XInput joysticks. The fork where I was experimenting with an audio receiver also implements receiving metadata frames. I think the Unity app would need to send metadata as well to advertise that it support PTZ control.