RGB image and depth image time sync

[CYJ00]

• Before opening a new issue, we wanted to provide you with some useful suggestions (Click "Preview" above for a better view):

  • Consider checking our ROS RealSense Wrapper documentation README.
  • Have you looked in our Discussions?
  • Try searching our GitHub Issues (open and closed) for a similar issue.

• All users are welcomed to report bugs, ask questions, suggest or request enhancements and generally feel free to open new issue, even if they haven't followed any of the suggestions above :)

---

Required Info
Camera Model	D415
Operating System & Version	Ubuntu 20.04
Platform	Laptop
ROS Distro	Noteic

ros-noetic-librealsense2: 2.50.0-1 ros-noetic-realsense2-camera: 2.3.2-1

Issue Description

<Describe your issue / question / feature request / etc..>

If I look at the time stamp of the image captured by the rostopic, the time is not correct. I want the time of the rgb image and the depth image to be the same time, but how can I do that?

[MartyG-RealSense]

Hi @CYJ00 Do you get the results that you require if you add enable_sync:=true to your roslaunch instruction, please? enable_sync: gathers the closest frames of different sensors, such as infrared, color and depth, to be sent with the same timetag.

[MartyG-RealSense]

Hi @CYJ00 Do you require further assistance with this case, please? Thanks!

[CYJ00]

Hello! I tried roslauch rs_camera.lanch enable_sync:=true The time time stamps of /camera/color/image_raw topic and /camera/depth/image_rect_raw topic are not same, but the error is acceptable. Thank you!

[MartyG-RealSense]

You are very welcome, @CYJ00 - I'm pleased that I could help. Thanks very much for the update!