Change camera resolution

[Xkim2000]

Hi,
I hope you're all well.
I want to change the resolution of the camera, I'm making this change using cv2. It's not working. Any ideas?
My code:

import cv2
from ultralytics import YOLO
import supervision as sv
import numpy as np

START = sv.Point(320,0)
END = sv.Point(320,480)



def main():
    model = YOLO("yolov8s.pt") 
    model.to('cuda')

    line_counter = sv.LineZone(start=START, end=END)
    line_annotator = sv.LineZoneAnnotator(
        thickness=2, 
        text_thickness=1, 
        text_scale=0.5
    )

    CLASS_NAMES_DICT = model.model.names

    box_annotator = sv.BoxAnnotator(
        thickness=2,
        text_thickness=1,
        text_scale=0.5
    )

    out_count = 0
    in_count = 0


    camera = cv2.VideoCapture(0)
    camera.set(cv2.CAP_PROP_FRAME_WIDTH, 1280)
    camera.set(cv2.CAP_PROP_FRAME_HEIGHT, 720) 
    frame = camera.read()
    
    for result in model.track(source=frame, stream=True):
        frame_anot = result.orig_img
        detections = sv.Detections.from_ultralytics(result)

        if result.boxes.id is not None:
            detections.tracker_id = result.boxes.id.cpu().numpy().astype(int)
           
        
        # Only keep detections with class_id 0, 1, 3
        detections = detections[np.isin(detections.class_id, [0, 1, 3, 67])]

        labels = [
            f"#{tracker_id} {CLASS_NAMES_DICT[class_id]} {confidence:0.2f}"
            for _, _, confidence, class_id, tracker_id
            in detections
        ]

        frame_anot = box_annotator.annotate(scene=frame_anot, detections=detections, labels=labels)
        #array.append(line_counter.trigger(detections=detections))
        line_counter.trigger(detections=detections)
        line_annotator.annotate(frame=frame_anot, line_counter=line_counter)

        out_count = line_counter.out_count
        in_count = line_counter.in_count

        """
        if old_in_counter != in_count:
            array_in.append(detections.class_id)

        if old_out_counter != out_count:
            array_out.append(detections.class_id)


        old_in_counter = in_count
        old_out_counter = out_count
        """
        

        cv2.imshow("yolov8", frame_anot)

        if(cv2.waitKey(30) == 27):
            break
    
    print("OUT: " + str(out_count))
    print("IN: " + str(in_count))
    #print(array_in)
    #print(array_out)    
    #print(array)

if __name__ == "__main__":
    main()

Thank's in advance