Timecode and Genlock Issues

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Hi there,

I am facing some difficulties regarding time code & genlock in Aximmetry.

1. If I don’t use Quadro Sync, is it still possible to generate the genlock / time code? Currently we are using:

a. HTC Vive Mars

b. Sony fx6 for the camera

c. Blackmagic Decklink 8k Pro

d. Blackmagic Mini Sync Senerator

2. On the Decklink, it can already read the frame rate, resolution 1080i50, and the Ref Input is already locked. However, when the time code sync is enabled, the camera tracking freeD always shown ‘can't keep current latency’. The camera delat input is already 0, tracking delay 0, and in to out latency is 6 or 8, but keep showing the ‘camera can’t keep current latency’. This has resulting the tracker to lost its connection.

3. We already follow this tutorial to show the genlock for the SDI output, and we even use the same devices except the camera, but still not showing the G on the screen.

https://youtu.be/uCXTZ5PGOLE

Is there any explanation for these issues? Or how to solve the issues?

Any feedback would be appreciated.

Thank you.

dershamilton

Comments

TwentyStudios

The FX6 can’t be genlocked, which is the central point when working with camera tracking that requires genlock. Without that there’s not much point in genlocking anything else in the camera tracking context. Aximmetry will genlock to the camera input signal and the Decklink Ref input only genlocks the the output of the Decklink.

So, right now the Vive Mars really isn’t suitable for cameras without genlocking capability. I’ve been advocating a system where the tracking data is genlocked in Aximmetry instead, so let’s hope Vive Mars implements something like this.

Eifert@Aximmetry

Hi,

Note that the G sign is only used if you want to genlock the output of your capture card. It has nothing to do with incoming signals that are genlocked or not. Sadly, there is no way to determine if the signal (tracking or video) is genlocked or not.
More on genlock and G sign here: https://aximmetry.com/learn/tutorials/for-studio-operators/syncing-and-genlock/#genlock-aximmetry-video-output

Warmest regards,

ccw0511

I have the same problem, when the time code sync is enabled, the camera tracking FreeD always shown 'cant keep current latency.' I turned on SDI on screen but no timecode appeared nor the Gsign. I could sync genlock and timecode in UE5 but unable to do so in aximmetry. Please help, thank you.

ccw0511

Eifert@Aximmetry

Hi,

Genlock and Timecode are two different things.

For the TimecodeSync to work, both your tracking and video input must contain a matching timecode.

In the case of Genlock input, the input synchronization will happen because all the signals arriving at the capture card are already synchronized from the different hardware outputs that are connected to the Genlock System. The capture card and Aximmetry won't be able to tell if these inputs' hardware are synchronized by the Genlock System or not, as there are no matching timecodes or any other type of data being outputted just because a hardware is genlocked. You can only confirm Genlock on your hardware, for example in the case of Black Magic cameras the "ref" word shows up next to the timecode on the camera control monitor when the camera is genlocked.

The G letter here in Aximmetry means the output of the capture card is genlocked:

This means that your capture card is receiving a synchronization signal from the Genlock System and outputting the video according to that. But this will not affect the video inputs and won't make any incoming signal genlocked.

Warmest regards,

Timecode and Genlock Issues

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