ZED2i image topic rate couldn't be changed by common.yaml

[fanhuaxiang]

Preliminary Checks

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• This issue is not a question, feature request, or anything other than a bug report directly related to this project.

Description

As I want to use ZED2i in 720p with 30Hz. I edit the common.yaml in zed_wrapper/params file.
The following is what I modified :

pub_frame_rate: 30
general:
serial_number: 39220361
resolution: 2
grab_frame_rate: 30

After the configuration in the common.yaml, I start ZED2i by roslaunch zed_wrapper zed2i.launch and monitor the rate of image by rostopic hz command, but the image topic rate is much lower as shown below:

The imu topic rate seems right, but the image topic is so weird.

What's wrong in my configuration or some other reasons?
Looking forward to the root cause.

Steps to Reproduce

1. Make sure Zed2i has been connected to Laptop.
2. Edit the common.yaml in zed_wrapper/params file as mentioned in Description.
3. Run roslaunch zed_wrapper zed2i.launch .
4. Run rostopic hz /zed2i/zed_node/imu/data /zed2i/zed_node/left/image_rect_gray /zed2i/zed_node/right/image_rect_gray.

...

Expected Result

The rate of image topic is nearly 30Hz.

Actual Result

The rate of image topic is lower than 10Hz.

ZED Camera model

ZED2i

Environment

Hardware: Laptop
OS: Ubuntu 18.04.6 LTS
CPU: Intel® Core™ i5-8300H CPU @ 2.30GHz × 8
GPU: NVIDIA GeForce GTX 1050/PCIe/SSE2
ROS: ROS melodic,rosversion 1.14.13
CUDA: 11.6
NVIDA Driver: 510.54

Anything else?

What I guess if the hardware configuartion of my laptop limits the image topic rate, little confused...

[fanhuaxiang]

I figured it out. But the condition is that pos_tracking is not necessary.
Solition:
pos_tracking_enabled: false