(io): realsense support is currently broken
Summary
RealSense grabbing seems broken on some platform. Furthermore, the CI is not configured to build it by default, making hard to even detect build failure.
Steps to reproduce
Launch any example that grabs video frame (exrealsense, exvideorecorder, exframebyframe): Nothing is grabbed.
ffplay /dev/video0 works and alos realsense-viewer.