python从时间上裁切视频（定义一个开始截取的时间，最后截取时间是总时长+1秒）

代码：

import subprocess
from datetime import timedelta

def parse_time(time_str):
    """将时间字符串解析为秒"""
    # 如果输入是浮点数，直接返回这个数值
    if isinstance(time_str, float):
        return time_str
    # 将时间字符串分割为小时、分钟和秒
    hours, minutes, seconds = map(float, time_str.split(':'))
    # 计算总秒数
    return timedelta(hours=hours, minutes=minutes, seconds=seconds).total_seconds()

def ffmpeg_get_duration(input_path):
    """获取视频的总时长（秒）"""
    result = subprocess.run(['ffprobe', '-v', 'error', '-show_entries', 'format=duration', '-of', 'default=noprint_wrappers=1:nokey=1', input_path], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
    # 将ffprobe输出的时长字符串转换为浮点数
    duration = float(result.stdout)
    return duration

# 其他函数保持不变...
def ffmpeg_trim(input_path, output_path, start_time, end_time):
    """使用ffmpeg裁剪视频"""
    start_time_sec = parse_time(start_time)
    end_time_sec = parse_time(end_time)

    cmd = [
        'ffmpeg',
        '-i', input_path,
        '-ss', str(start_time_sec),
        '-to', str(end_time_sec),
        '-c', 'copy',
        output_path
    ]

    try:
        subprocess.run(cmd, check=True)
    except subprocess.CalledProcessError as e:
        print(f"An error occurred while processing the video: {e}")
        
# 要裁剪的视频文件路径
video_path = r'E:\edge下载\81\81-创建渲染框架.mp4'
output_path = r'E:\edge下载\81\81-创建渲染框架_qutou.mp4'
# 获取视频的总时长
original_duration = ffmpeg_get_duration(video_path)

# 打印视频的总时长（HH:MM:SS格式）
print(f"Original video duration: {str(timedelta(seconds=original_duration))}")

# 用户定义的裁剪开始时间
start_time_defined = '00:00:08'  # 从第08秒开始裁剪

# 计算裁剪的结束时间（原视频时长 + 1秒）
end_time_defined = str(timedelta(seconds=original_duration + 1))

# 调用函数进行时间裁剪
ffmpeg_trim(video_path, output_path, start_time_defined, end_time_defined)