Does the cob_people_detection package work?

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I have been trying to run this package for a while but have had no luck. When I run "roslaunch cob_people_detection people_detection.launch", the face detector pops up but it isn't receiving the video stream. The launch file is already configured correctly and I have verified this by checking the launch parameters in rviz. I am able to get the video stream on rviz by using the same launch parameters used in the cob launch file.

Not sure what's wrong here. Does this package not work?