services: fpv-tracker: environment: FPV_SOURCE: ${FPV_SOURCE:-0} FPV_CAP_BACKEND: ${FPV_CAP_BACKEND:-v4l2} devices: - ${FPV_CAMERA_DEVICE:-/dev/video0}:/dev/video0 fpv-ui: environment: FPV_SOURCE: ${FPV_SOURCE:-0} FPV_CAP_BACKEND: ${FPV_CAP_BACKEND:-v4l2}