def get_file_name(cam_id, view_id, ds, b, w, h, sf, st, et):
    """
    Return a file name

    Input:
        cam_id: camera id (int)
        view_id: view id (int)
        ds: datetime string (str), "2015-05-22"
        b: bounding box (dictionary with Left Top Right Bottom), e.g., {"L": 2330, "T": 690, "R": 3730, "B": 2090}
        w: width (int)
        h: height (int)
        sf: starting frame number (int)
        st: starting epochtime in seconds (int)
        et: ending epochtime in seconds (int)
    """
    return "%d-%d-%s-%r-%r-%r-%r-%r-%r-%r-%r-%r" % (cam_id, view_id, ds, b["L"], b["T"], b["R"], b["B"], w, h, sf, st, et)