Tracked camera template, the a | Forum

Tracked camera template, the actual shooting content experiences shaking.

Hello,

I am using the Broadcast DE 2023.2.2 version with the HTC VIVE system for camera tracking

（Due to project reasons, I do not want to upgrade the version temporarily）.

Currently, When I move the camera, the alignment between the virtual scene and the real-world scene is relatively accurate. However, the live-action footage exhibits stuttering and shaking, whereas the virtual scene remains smooth. Could you please explain what might be causing this discrepancy? Are there any methods to resolve or improve this issue?

This is the link to the MP4 video of the stuttering footage I recorded：

https://drive.google.com/file/d/1FoAJ_6JNtLvoN0n6IYlOSWU6Tx96vHHI/view?usp=sharing

My input settings:（only set tracking delay：2.5）

Tracked camera template, the actual shooting content experiences shaking.

dysoncompany

Is there any way I can troubleshoot this issue?

TwentyStudios

That’s quite bizarre! You should start by checking that your camera frame rate and the Aximmetry project rendering frame rate as well as the output frame rate are all matching. Also check that you don’t have any sort of stabilization enabled on the camera or the lens itself.

dysoncompany

Hi，my camera input parameters are 1080P at 50 frames per second.

Does that mean I need to change the project frame rate to 50 frames per second as well?

dysoncompany

hi，@TwentyStudios

I followed your advice and conducted multiple rounds of testing today. Firstly, my camera's anti shake function was turned off. When I tested the rendering frame rate, I found a very strange issue:My camera has a frame rate of 50P, and when I adjust the rendering frame rate to 50P、30P、 even 24P, there are varying degrees of jitter issues. But, setting it to 25P is looks like normal. What is the reason for this? Is there a 25 frame limit set somewhere？（My graphics card is RTX4080S, so there shouldn't be any performance issues）

Tracked camera template, the actual shooting content experiences shaking.

test video link：https://drive.google.com/file/d/1riqqobecetquKn03oIKj5_bY6Yp0AX9o/view?usp=sharing

Looking forward to your help！

TwentyStudios

Are you sure your camera is sending 50p and not 50i? Regarding the frame rate, you definitely need to match the project frame rate to the camera frame rate. Also your output frame rate should match the project frame rate.

dysoncompany

Hi @TwentyStudios

Yes,Iure my camera is sending 50p. Regarding the frame rate, So I don't understand why the rendering is set to 25P and 50P is not.

TwentyStudios

What does the CPU/GPU meter in Aximmetry show? What frame rate does it report when you’ve set the engine to render in 50p? Even with a 4080s, Unreal could definitely struggle to render 108050p, depending on how complex and well optimized the scene is. UE5 is terribly unoptimized and it’s very easy to end up with a project that brings the GPU to its knees.
Also, have you check your output settings and that the frame rate is matching there?

Tracked camera template, the actual shooting content experiences shaking.

Cookie consent