python-3.x - 如何在 python 中使用 ffmpeg 压缩视频？

Question

我制作了这个脚本用于在 Python 3 中压缩视频：

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

当我运行上述内容时，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？

Answer 1

几乎正确！看起来您需要的唯一模块是子流程。您应该在run()函数中运行您的命令。尝试这个：

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