code: def run(
          stream_spec, cmd='ffmpeg', capture_stdout=False, capture_stderr=False, input=None,
          quiet=False, overwrite_output=False):
      
      process = run_async(
          stream_spec,
          cmd,
          pipe_stdin=input is not None,
          pipe_stdout=capture_stdout,
          pipe_stderr=capture_stderr,
          quiet=quiet,
          overwrite_output=overwrite_output,
      )
      out, err = process.communicate(input)
      retcode = process.poll()
      if retcode:
          raise Error('ffmpeg', out, err)
      return out, err
docs: Invoke ffmpeg for the supplied node graph.
  
      Args:
          capture_stdout: if True, capture stdout (to be used with
              ``pipe:`` ffmpeg outputs).
          capture_stderr: if True, capture stderr.
          quiet: shorthand for setting ``capture_stdout`` and ``capture_stderr``.
          input: text to be sent to stdin (to be used with ``pipe:``
              ffmpeg inputs)
          **kwargs: keyword-arguments passed to ``get_args()`` (e.g.
              ``overwrite_output=True``).
  
      Returns: (out, err) tuple containing captured stdout and stderr data.