D435i Could not load library dlopen error: libwebp.so.6

[Somethingout]

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Required Info
Camera Model	{ D435i }
Firmware Version	(Open RealSense Viewer --> Click info)
Operating System & Version	{ Linux (Ubuntu 22) }
Kernel Version (Linux Only)	(e.g. 5.4)
Platform	PC
Librealsense SDK Version	{ 2.55.1 }
Language	{C/C#/labview/opencv/pcl/python/unity }
Segment	{Robot/Smartphone/VR/AR/others }
ROS Distro	{Humble }
RealSense ROS Wrapper Version	{4.51.1, 4.54.1, etc..}

Issue Description

I installed the sdk and cloned the ros2 wrapper packges into my workspace but when I try to start ros2 run realsense2_camera realsense2_camera_node I get this error: `terminate called after throwing an instance of 'class_loader::LibraryLoadException' what(): Could not load library dlopen error: libwebp.so.6: cannot open shared object file: No such file or directory, at ./src/shared_library.c:99

` When i try to look for the debian package libwebp6 I don't find it, there is libwebp7 but it doesnt solve the issue.

Note that the camera works fine with realsense-viewer.

Any idea on how to fix this issue?

Thanks.

[MartyG-RealSense]

Hi @Somethingout This precise error with libwebp.so has not been previously reported in relation to RealSense.

Which librealsense SDK version did you install, please?

If you git cloned the ROS2 wrapper then I can imagine that the latest 4.56.1 wrapper version may have been installed, which is designed for use with the current latest 'interim beta' version 2.56.1 version of librealsense.

If your librealsense version is 2.55.1 then the ROS2 wrapper designed for that is 4.55.1.

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Do you experience the same problem if you use the launch file instead of ros2 run?

ros2 launch realsense2_camera rs_launch.py

[Somethingout]

Hi @MartyG-RealSense I installed librealsense2 debian package from Intel servers (option 1) from this README which resulted in a librealsense SDK 2.55.1.

The version specified in the XML file of the ROS2 packages is 4.55.1 (I followed option2). and when I open the realsense-viewer it is written V2.55.1

Yes I have the same error with the launch file ros2 launch realsense2_camera rs_launch.py

The camera firmware version is the latest 5.16.0.1 according to this command rs-enumerate-devices -v

[Somethingout]

Problem solved by creating a symbolic link with the version installed in my computer. Thank you for your help!

[MartyG-RealSense]

You are very welcome! It's great to hear that you achieved a solution. :)

The most similar error in a past case to the one that you reported is at https://github.com/IntelRealSense/librealsense/issues/11918#issuecomment-1682878232 and the RealSense ROS user in that case solved it by using the command colcon build --packages-select realsense2_camera to update links.

[Somethingout]

Thanks !