pointgrey_camera_driver : Get shutter value

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Hi !

I am using pointgrey_camera_driver to use and trigger a camera (i am not setting the shutter speed in the parameters.) I know that some information can be embedded in the image (shutter is one of them.)

The image_exposure_msgs/ExposureSequence msgs should contain these information and should be published in /camera/exposure_sequence topic. However, when I print the output of this topic, it seems that there is noting published here !

Is there any way to get these data then ?

Thank you