如何在python中使用ffmpeg压缩视频？

问题描述

我制作了这个脚本来用Python 3压缩视频。

import os
import sys
import subprocess
result = subprocess.run('ffmpeg -i output.mp4 -b 800k output.mp4')
print(result)

运行上述命令时，会出现一些错误，例如System cannot find the file specified：

  result = subprocess.run('ffmpeg -i output.mp4 -b 800k output.mp4')
  File "C:\Program Files\Python37\lib\subprocess.py",line 488,in run
    with Popen(*popenargs,**kwargs) as process:
  File "C:\Program Files\Python37\lib\subprocess.py",line 800,in __init__
    restore_signals,start_new_session)
  File "C:\Program Files\Python37\lib\subprocess.py",line 1207,in _execute_child
    startupinfo)
FileNotFoundError: [WinError 2] The system cannot find the file specified

问题：如何修复代码以正确压缩视频？

解决方法

几乎正确！看起来您唯一需要的模块是子流程。您应该在run()函数中运行命令。试试这个：

import subprocess
result = subprocess.run('ffmpeg -i output.mp4 -b 800k output.mp4')
print(result)