Subject: Need Help with Logitech C922 Pro HD Streaming Webcam 60FPS Issue
Hello,
First of all, I would appreciate your understanding as my English is not fluent.
I am using the Logitech C922 Pro HD Streaming Webcam to capture real-time video at 60FPS. The webcam supports 60FPS, and the video format is MJPG.
However, no matter what I try, the maximum FPS I can achieve is 30FPS, and when setting the resolution to 720p, the FPS drops to 10FPS.
Steps I have tried:
- Checked if 60FPS is supported using Logitech Capture and Logi Tune
- Contacted Logitech support to check if there are any limitations
- Changed the backend (DSHOW, MSMF)
- Changed the video format (MJPG)
- Disabled auto exposure and manually adjusted the exposure settings (
CAP_PROP_AUTO_EXPOSURE)
Default settings when no modifications are applied (get function results):
- Resolution: 640x480
- FPS: 30.0
- Brightness: 128.0
- Contrast: 128.0
- Saturation: 128.0
- Exposure: -5.0
My system environment:
- OS: Windows 11
- Hardware: Intel(R) Core™ i5-14400 2.50 GHz
- OpenCV Version: 4.11.0.86
- IDE: Visual Studio Code
Since the camera performance is crucial for my project, I would greatly appreciate any help. Please help me!
Below is the code I have tested:
import os
os.environ["OPENCV_VIDEOIO_MSMF_ENABLE_HW_TRANSFORMS"] = "0"
import cv2
# import cscore
import time
# 웹캠 열기 (0번 장치)
cap = cv2.VideoCapture(0, cv2.CAP_MSMF) # CAP_DSHOW, CAP_MSMF
# cap = cscore.VideoCapture(0)
vid_fmt = cv2.VideoWriter_fourcc('M', 'J', 'P', 'G')
cap.set(cv2.CAP_PROP_FOURCC, vid_fmt)
# 해상도
width = cap.set(cv2.CAP_PROP_FRAME_WIDTH, 1280) # 가로 해상도
height = cap.set(cv2.CAP_PROP_FRAME_HEIGHT, 720) # 세로 해상도
# fps
fps = cap.get(cv2.CAP_PROP_FPS) # FPS
print(f" ▶ 변경 전 FPS: {fps}")
cap.set(cv2.CAP_PROP_FPS, 60) # FPS
print(f" ▶ 변경 후 FPS: {cap.get(cv2.CAP_PROP_FPS)}")
# 자동 노출 끄기 (0으로 설정)
cap.set(cv2.CAP_PROP_AUTO_EXPOSURE, 1)
if not cap.isOpened():
print("웹캠을 열 수 없습니다.")
exit()
# 📷 웹캠 기본 정보
# ▶ 해상도: 640x480
# ▶ FPS: 30.0
# ▶ 밝기(Brightness): 128.0
# ▶ 대비(Contrast): 128.0
# ▶ 채도(Saturation): 128.0
# ▶ 노출(Exposure): -5.0
print(f" ▶ 해상도: {int(cap.get(cv2.CAP_PROP_FRAME_WIDTH))}x{int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT))}")
# 밝기 (0~1)
brightness = cap.set(cv2.CAP_PROP_BRIGHTNESS, 128) # 밝기
print(f" ▶ 밝기(Brightness): {cap.get(cv2.CAP_PROP_BRIGHTNESS)}")
# 대비 (0~1)
# contrast = cap.set(cv2.CAP_PROP_CONTRAST, 0) # 대비
print(f" ▶ 대비(Contrast): {cap.get(cv2.CAP_PROP_CONTRAST)}")
saturation = cap.get(cv2.CAP_PROP_SATURATION) # 채도
exposure = cap.get(cv2.CAP_PROP_EXPOSURE) # 노출
# ▶ 웹캠 정보 출력
print(f" ▶ 채도(Saturation): {saturation}")
print(f" ▶ 노출(Exposure): {exposure}")
vid_fmt = cv2.VideoWriter_fourcc('M', 'J', 'P', 'G')
cap.set(cv2.CAP_PROP_FOURCC, vid_fmt)
# FPS를 수동으로 계산할 변수들
fps = 0
frame_count = 0
start_time = time.time()
while True:
ret, frame = cap.read()
if not ret:
print("프레임을 가져올 수 없습니다.")
break
# FPS 수동 계산
frame_count += 1
elapsed_time = time.time() - start_time # 경과 시간
if elapsed_time >= 1:
fps = frame_count / elapsed_time # FPS 계산
start_time = time.time() # 시간 초기화
frame_count = 0 # 카운트 초기화
# 화면에 FPS 정보 표시
cv2.putText(frame, f"FPS: {fps:.2f}", (10, 30), cv2.FONT_HERSHEY_SIMPLEX, 1, (0, 255, 0), 2)
cv2.imshow("Logitech Webcam", frame)
if cv2.waitKey(1) & 0xFF == ord('q'):
break
cap.release()
cv2.destroyAllWindows()
