OpenCV视频未显示全尺寸

发布于 2025-02-12 02:57:58 字数 800 浏览 1 评论 0原文

我的问题是 opencv运行，并显示我的视频的原始大小（似乎OpenCV缩小了视频略微缩小），从而影响了我感兴趣的区域。

OpENCV如何显示我的视频的确切尺寸？以下是我的代码和视频原始大小的差异以及OpenCV显示的内容。

代码：

import cv2
cap = cv2.VideoCapture("video_link")
while True:
   ret, frame = cap.read()
   if not ret:
      break
   cv2.imshow("frame", frame)
   key = cv2.waitKey(1)
   if key == 27:
      break
cap.release()
cv2.destroyWindow()

原始大小：

openCV视频输出大小：

原文

My problem is opencv runs and show my video not in its original size (seems OpenCV shrinks the video little bit), effecting my region of interest.

How can OpenCV show the exact orginal size of my video? Below is my code and the difference of the video original size and what OpenCV display.

Code:

import cv2
cap = cv2.VideoCapture("video_link")
while True:
   ret, frame = cap.read()
   if not ret:
      break
   cv2.imshow("frame", frame)
   key = cv2.waitKey(1)
   if key == 27:
      break
cap.release()
cv2.destroyWindow()

Original size:

OpenCV Video output size:

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旧伤还要旧人安 2025-02-19 02:57:58

尝试一下，祝你好运。手动输入相机提要的高度和宽度。（编辑：dShow仅在获胜中起作用，如果您有其他东西，请使用其他解决方案）

import cv2

video="videolink"
height=1080 #for some reason, ANYTHING else works for my HD camera for example 1079..
width=1920

cap = cv2.VideoCapture(video, cv2.CAP_DSHOW)
cap.set(cv2.CAP_PROP_FRAME_HEIGHT, height)
cap.set(cv2.CAP_PROP_FRAME_WIDTH, width)

while cap.isOpened():
    success, image = cap.read()
    if not success:
      print("Ignoring empty camera frame.")
      # If loading a video, use 'break' instead of 'continue'.
      continue
    cv2.imshow('CameraFeed', image )
    if cv2.waitKey(5) & 0xFF == ord("q"):
      break
cap.release()

try this, good luck. Manually enter the height, and width of the camera feed.(edit: Dshow works only in WIN, if you have something else, use different solution)

import cv2

video="videolink"
height=1080 #for some reason, ANYTHING else works for my HD camera for example 1079..
width=1920

cap = cv2.VideoCapture(video, cv2.CAP_DSHOW)
cap.set(cv2.CAP_PROP_FRAME_HEIGHT, height)
cap.set(cv2.CAP_PROP_FRAME_WIDTH, width)

while cap.isOpened():
    success, image = cap.read()
    if not success:
      print("Ignoring empty camera frame.")
      # If loading a video, use 'break' instead of 'continue'.
      continue
    cv2.imshow('CameraFeed', image )
    if cv2.waitKey(5) & 0xFF == ord("q"):
      break
cap.release()

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