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"""
使用 moviepy 库剪辑指定时间戳视频，支持时分秒毫秒精度
"""
from moviepy.editor import VideoFileClip
from datetime import datetime
import os
def time_str_to_seconds(time_str: str) -> float:
"""
将时间字符串转换为秒数
参数:
time_str: 格式为"HH:MM:SS,mmm"的时间字符串，例如"00:01:23,456"
返回:
转换后的秒数(float)
"""
try:
# 分离时间和毫秒
time_part, ms_part = time_str.split(',')
# 转换时分秒
time_obj = datetime.strptime(time_part, "%H:%M:%S")
# 计算总秒数
total_seconds = time_obj.hour * 3600 + time_obj.minute * 60 + time_obj.second
# 添加毫秒部分
total_seconds += int(ms_part) / 1000
return total_seconds
except ValueError as e:
raise ValueError("时间格式错误，请使用 HH:MM:SS,mmm 格式，例如 00:01:23,456") from e
def format_duration(seconds: float) -> str:
"""
将秒数转换为可读的时间格式
参数:
seconds: 秒数
返回:
格式化的时间字符串 (HH:MM:SS,mmm)
"""
hours = int(seconds // 3600)
minutes = int((seconds % 3600) // 60)
seconds_remain = seconds % 60
whole_seconds = int(seconds_remain)
milliseconds = int((seconds_remain - whole_seconds) * 1000)
return f"{hours:02d}:{minutes:02d}:{whole_seconds:02d},{milliseconds:03d}"
def cut_video(video_path: str, start_time: str, end_time: str, output_path: str) -> None:
"""
剪辑视频
参数:
video_path: 视频文件路径
start_time: 开始时间 (格式: "HH:MM:SS,mmm")
end_time: 结束时间 (格式: "HH:MM:SS,mmm")
output_path: 输出文件路径
"""
try:
# 确保输出目录存在
output_dir = os.path.dirname(output_path)
if not os.path.exists(output_dir):
os.makedirs(output_dir)
# 如果输出文件已存在，先尝试删除
if os.path.exists(output_path):
try:
os.remove(output_path)
except PermissionError:
print(f"无法删除已存在的文件：{output_path}，请确保文件未被其他程序占用")
return
# 转换时间字符串为秒数
start_seconds = time_str_to_seconds(start_time)
end_seconds = time_str_to_seconds(end_time)
# 加载视频文件
video = VideoFileClip(video_path)
# 验证时间范围
if start_seconds >= video.duration or end_seconds > video.duration:
raise ValueError(f"剪辑时间超出视频长度！视频总长度为: {format_duration(video.duration)}")
if start_seconds >= end_seconds:
raise ValueError("结束时间必须大于开始时间！")
# 计算剪辑时长
clip_duration = end_seconds - start_seconds
print(f"原视频总长度: {format_duration(video.duration)}")
print(f"剪辑时长: {format_duration(clip_duration)}")
print(f"剪辑区间: {start_time} -> {end_time}")
# 剪辑视频
video = video.subclip(start_seconds, end_seconds)
# 添加错误处理的写入过程
try:
video.write_videofile(
output_path,
codec='libx264',
audio_codec='aac',
temp_audiofile='temp-audio.m4a',
remove_temp=True
)
except IOError as e:
print(f"写入视频文件时发生错误：{str(e)}")
raise
finally:
# 确保资源被释放
video.close()
except Exception as e:
print(f"视频剪辑过程中发生错误：{str(e)}")
raise
if __name__ == "__main__":
cut_video(
video_path="/Users/apple/Desktop/NarratoAI/resource/videos/duanju_yuansp.mp4",
start_time="00:00:00,789",
end_time="00:02:00,123",
output_path="/Users/apple/Desktop/NarratoAI/resource/videos/duanju_yuansp_cut3.mp4"
)
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