python 视频抽帧

可以使用 Python 库中的 OpenCV 和 ffpyplayer 进行视频抽帧。

1. 使用 OpenCV:

import cv2

# Open the video file
video = cv2.VideoCapture("path/to/video.mp4")

# Get the frames per second (fps) of the video
fps = video.get(cv2.CAP_PROP_FPS)

# Get the total number of frames in the video
num_frames = int(video.get(cv2.CAP_PROP_FRAME_COUNT))

# Choose the interval for frames to be extracted (e.g. every 10th frame)
frame_interval = 10

# Initialize a counter for the current frame
current_frame = 0

# Loop through the frames of the video
while True:
    # Grab the current frame
    ret, frame = video.read()
    # Break the loop if the video has ended
    if not ret:
        break
    # Increment the frame counter
    current_frame += 1
    # If the current frame is an interval frame, save it
    if current_frame % frame_interval == 0:
        cv2.imwrite("path/to/save/frame{}.jpg".format(current_frame), frame)

# Release the video capture object
video.release()

2. 使用 ffpyplayer

import ffpyplayer

# Open the video file
video = ffpyplayer.Player("path/to/video.mp4")

# Get the frames per second (fps) of the video
fps = video.get_fps()

# Get the total number of frames in the video
num_frames = video.get_metadata()['duration']*fps

# Choose the interval for frames to be extracted (e.g. every 10th frame)
frame_interval = 10

# Initialize a counter for the current frame
current_frame = 0

# Loop through the frames of the video
while video.get_frame():
    # Grab the current frame
    video.get_frame()
    # Increment the frame counter
    current_frame += 1
    # If the current frame is an interval frame, save it
    if current_frame % frame_interval == 0:
        video.save_frame("path/to/save/frame{}.jpg".format(current_frame))

以上两个代码示例都是每隔10帧抽取一帧。记得根据你的视频帧数和视频长度来调整抽取间隔。