基于 Python 和 OpenCV 实现视频裁剪的示例代码

实现目标：

根据给定开始和结束时间戳裁剪视频片段。

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代码

基于python和opencv:

import cv2

# 设置输入视频的文件名和裁剪时间段
filename = 'E:\CODE/video/tools/tools/bheb1\static\【Dallas Mavericks vs Denver Nuggets 15 Feb 2023 Replays Full Game】/FullGame.flv'
start_time = '00:10:00' # HH:MM:SS 格式
end_time = '00:12:30' # HH:MM:SS 格式

# 打开视频文件
cap = cv2.VideoCapture(filename)

# 获取视频的帧率、总帧数和时长
fps = cap.get(cv2.CAP_PROP_FPS)
total_frames = int(cap.get(cv2.CAP_PROP_FRAME_COUNT))
duration = total_frames / fps

# 将时间戳转换为秒数
start_sec = sum(x * int(t) for x, t in zip([3600, 60, 1], start_time.split(':')))
end_sec = sum(x * int(t) for x, t in zip([3600, 60, 1], end_time.split(':')))

# 计算裁剪时间段的起始帧和结束帧
start_frame = int(start_sec * fps)
end_frame = int(end_sec * fps)

# 设置裁剪后输出视频的文件名和编码器
output_filename = './output_video.mp4'
fourcc = cv2.VideoWriter_fourcc(*'mp4v')

# 设置输出视频的帧率和分辨率
out_fps = fps
out_width = int(cap.get(cv2.CAP_PROP_FRAME_WIDTH))
out_height = int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT))

# 创建输出视频的对象
out = cv2.VideoWriter(output_filename, fourcc, out_fps, (out_width, out_height))

# 跳转到裁剪时间段的起始帧
cap.set(cv2.CAP_PROP_POS_FRAMES, start_frame)

# 读取并写入裁剪时间段内的每一帧
for i in range(start_frame, end_frame):
    ret, frame = cap.read()
    if ret:
        out.write(frame)
    else:
        break

# 释放对象并关闭窗口
cap.release()
out.release()
cv2.destroyAllWindows()

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裁剪前：

裁剪完成！

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