camera follow scene or multiple robots

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hello. I have multiple robots (case study, 3) moving along a path in gazebo. Now I want the camera to move along as the robots move so that they dont go out of view. The gazebo follow mode would be perfect but it only works for one robot at a time. If could control its zoom and view angle then may be with a little tweaking it could do the job. Otherwise, Is there a way to achieve this. If also possible i would like the camera to occasionally change view angle and view the robots from sideways. Thank you very much.