实现目标:
根据给定开始和结束时间戳裁剪视频片段。
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()
裁剪前:
裁剪完成!
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