capture.read(frame)
时间: 2023-02-08 12:16:55 浏览: 129
`cv2.VideoCapture.read(frame)` 是 OpenCV 中用来读取视频帧的函数。函数的参数 `frame` 是一个变量,用来存储当前读取到的视频帧。
这个函数的返回值是一个布尔值,表示是否读取成功。如果读取成功,返回 `True`,并且 `frame` 变量中就存储了当前读取到的视频帧;如果读取失败,返回 `False`,并且 `frame` 变量中就没有有效的视频帧。
示例代码如下:
```python
import cv2
# Open a video file
capture = cv2.VideoCapture("video.mp4")
while True:
# Read a frame from the video file
ret, frame = capture.read()
if not ret:
break
# Do something with the frame
cv2.imshow("Video", frame)
# Exit if the user presses the 'q' key
if cv2.waitKey(1) & 0xFF == ord('q'):
break
# Release the capture
capture.release()
```
其中capture是一个视频读取对象。
相关问题
capture.read
capture.read()函数是用于读取视频文件或摄像头的一帧图像。它返回两个值,第一个值ret是一个布尔型,表示是否成功读取到一帧图像。如果成功读取到一帧图像,ret的值为1,否则为0。第二个值frame是一个图像对象,表示读取到的一帧图像。通过循环调用capture.read()函数,可以逐帧读取视频文件或摄像头的图像,并进行处理或显示。\[1\]\[2\]\[3\]
#### 引用[.reference_title]
- *1* *3* [python实现opencv学习三:调用摄像头或打开视频文件](https://blog.csdn.net/weixin_40338379/article/details/117753169)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^control_2,239^v3^insert_chatgpt"}} ] [.reference_item]
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capture.read()
The `capture.read()` function is used in computer vision and image processing to read a frame from a video file or a camera feed. It returns two values - a boolean value indicating whether the frame was successfully read or not, and the frame itself as a numpy array. The function is typically used in a loop to continuously read frames from the video source until the end of the file or until the user interrupts the program.