Local realtime person detection for RTSP cameras

I have the following setup, and this is working. I only want to rotate the camera image 90 degrees, how do I do this?

cameras:
  camera_front:
    ffmpeg:
      inputs:
        - path: rtsp://xxxx:xxxxx@XXXX:554/Streaming/Channels/102?transportmode=unicast&profile=Profile_1
          roles:
            - detect
            - rtmp
        - path: rtsp://xxxx:xxxxx@XXXX:554/Streaming/Channels/101?transportmode=unicast&profile=Profile_1
          roles:
            - clips
    width: 640
    height: 480
    fps: 5
    objects:
      track:
        - person
        - car
        - bycicle
        - dog
        - cat