Python 播放 ffpyplayer 后删除文件

Question

在我的项目中，我喜欢用 cv2 播放视频，用 ffpyplayer 播放声音。

除了最后一行外，下面显示的代码有效：

os.remove("testinn.mp4")

报错：

PermissionError: [WinError 32] The process cannot access the file because it is being used by another process: 'testinn.mp4'.

我可以断定文件没有正确关闭，所以无法删除。问题不在 cv2（如果删除 ffpyplayer 部分，它确实会删除）。但是在 ffpyplayer.

如何关闭此文件以便在播放后将其删除？

import os
    
import cv2
import numpy as np
from ffpyplayer.player import MediaPlayer

video_name = "testinn.mp4"
window_name = "window"
interframe_wait_ms = 30

cap = cv2.VideoCapture(video_name)
player = MediaPlayer(video_name)
if not cap.isOpened():
    print("Error: Could not open video.")
    exit()

cv2.namedWindow(window_name, cv2.WND_PROP_FULLSCREEN)
cv2.setWindowProperty(window_name, cv2.WND_PROP_FULLSCREEN, cv2.WINDOW_FULLSCREEN)
audio_frame, val = player.get_frame()
while (True):
    ret, frame = cap.read()
    if not ret:
        print("Reached end of video, exiting.")
        break

    cv2.imshow(window_name, frame)
    if cv2.waitKey(interframe_wait_ms) & 0x7F == ord('~'):
        print("Exit requested.")
        break

cap.release()
cv2.destroyAllWindows()
os.remove("testinn.mp4")

Answer 1

您忘记关闭 MediaPlayer。

根据document：

close_player(self)
Closes the player and all resources.

我使用 pathlib.Path.unlink() 删除文件，但应该与 os.remove 相同。查看 pathlib.Path，因为它提供了方便而强大的高级接口。

>>> from ffpyplayer.player import MediaPlayer
>>> from pathlib import Path
>>> vid = Path("x:/cyan uwu.mp4")
>>> player = MediaPlayer(vid.as_posix())

# Can't delete while MediaPlayer is open

>>> vid.unlink()
Traceback (most recent call last):
  File "<input>", line 1, in <module>
  File "...\Python39\lib\pathlib.py", line 1343, in unlink
    self._accessor.unlink(self)
PermissionError: [WinError 32] "<error message in your language>" : 'x:\cyan uwu.mp4'

# After closing you're free to remove

>>> player.close_player()
>>> vid.unlink()
>>>

Python 播放 ffpyplayer 后删除文件

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