[ROS2] image_transport: theora error

[Myzhar]

Using image_transport::CameraPublisher I get this error for each publisher I create:

Failed to load plugin image_transport/theora_pub, error string: Could not find library corresponding to plugin image_transport/theora_pub. Make sure the plugin description XML file has the correct name of the library and that the library actually exists.

The error comes with this warning associated to pluginlib.ClassLoader:

given plugin name 'lib/theora_image_transport' should be '/theora_image_transport' for better portability

[klintan]

Might be obvious suggestions however; have you downloaded and symlinked image_transport_plugins? if you need "theora" support? https://github.com/ros-perception/image_transport_plugins/tree/ros2

I used the image_transport ros2 branch successfully in this project https://github.com/klintan/ros2-usb-camera , creating publishers using the image_transport. Had to download the transport plugins for the image_transport "republish" -command to work though, but not for the camera-package (which just publishes regular sensor-images messages.

[Myzhar]

I installed image_transport from binaries using apt, so I think that the package is correct.

I checked and the theory library is installed.

What is weird is the kind of error, it seems that the library plugin is wrongly described in the XML

[kervel]

i have the same error. when i do a trace i see that it looks for a libtheora_image_transport.so which is not found. however, on my system, there is a libtheora_image_transport_component.so .

i changed the theora_plugins.xml so that the first line now reads
<library path="theora_image_transport_component">

and the error is gone here.