Question

我想在Python中通过命令行运行命令。当我打开cmd并发出以下命令时，它将起作用：

ffmpeg -f concat -safe 0 -i C:\test\test.txt -c copy C:\test\out.MP4

现在，我尝试通过以下方式在Python中运行它：

from subprocess import check_call
concat_list = "C:\\test\\test.txt"
out_file = "C:\\test\\out.MP4"
check_call(["ffmpeg", "-f", "concat", "-safe", "0", "-i", concat_list, "-c", "copy", out_file])

执行此操作时，出现错误“ FileNotFoundError：[WinError 2]系统找不到指定的文件”。

我怎么了？

完整的错误消息是：

    'ffmpeg' is not recognized as an internal or external command,
operable program or batch file.
    Traceback (most recent call last):
      File "C:/Users/xxx/Desktop/xxx/trunk/python/xxx/src/videos/processVideo.py", line 48, in <module>
        check_call(["ffmpeg", "-f", "concat", "-safe", "0", "-i", concat_list, "-c", "copy", out_file])
      File "C:\Users\xxx\AppData\Local\Continuum\anaconda3\lib\subprocess.py", line 336, in check_call
        retcode = call(*popenargs, **kwargs)
      File "C:\Users\xxx\AppData\Local\Continuum\anaconda3\lib\subprocess.py", line 317, in call
        with Popen(*popenargs, **kwargs) as p:
      File "C:\Users\xxx\AppData\Local\Continuum\anaconda3\lib\subprocess.py", line 769, in __init__
        restore_signals, start_new_session)
      File "C:\Users\xxx\AppData\Local\Continuum\anaconda3\lib\subprocess.py", line 1172, in _execute_child
        startupinfo)
    FileNotFoundError: [WinError 2] The system cannot find the file specified

在命令行上运行ffmpeg无法正常工作

0 个答案: