如何让 Python 找到 ffprobe?

How can I get Python to find ffprobe?

我在 mac (macOS Sierra) 上安装了 ffmpegffprobe,并且我已将它们的路径添加到 PATH。我可以从终端 运行 他们。

我正在尝试使用 ffprobe 通过以下代码获取视频文件的宽度和高度:

import subprocess
import shlex
import json


# function to find the resolution of the input video file
def findVideoResolution(pathToInputVideo):
    cmd = "ffprobe -v quiet -print_format json -show_streams"
    args = shlex.split(cmd)
    args.append(pathToInputVideo)
    # run the ffprobe process, decode stdout into utf-8 & convert to JSON
    ffprobeOutput = subprocess.check_output(args).decode('utf-8')
    ffprobeOutput = json.loads(ffprobeOutput)

    # find height and width
    height = ffprobeOutput['streams'][0]['height']
    width = ffprobeOutput['streams'][0]['width']

    return height, width

h, w = findVideoResolution("/Users/tomburrows/Documents/qfpics/user1/order1/movie.mov")
print(h, w)

很抱歉我无法提供 MCVE,因为我没有编写这段代码,而且我也不知道它是如何工作的。

它给出了以下错误:

Traceback (most recent call last):
  File "/Users/tomburrows/Dropbox/Moviepy Tests/get_dimensions.py", line 21, in <module>
    h, w = findVideoResolution("/Users/tomburrows/Documents/qfpics/user1/order1/movie.mov")
  File "/Users/tomburrows/Dropbox/Moviepy Tests/get_dimensions.py", line 12, in findVideoResolution
    ffprobeOutput = subprocess.check_output(args).decode('utf-8')
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/subprocess.py", line 626, in check_output
    **kwargs).stdout
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/subprocess.py", line 693, in run
    with Popen(*popenargs, **kwargs) as process:
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/subprocess.py", line 947, in __init__
    restore_signals, start_new_session)
  File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/subprocess.py", line 1551, in _execute_child
    raise child_exception_type(errno_num, err_msg)
FileNotFoundError: [Errno 2] No such file or directory: 'ffprobe'

如果 python 没有从 PATH 文件读取,我如何指定 ffprobe 在哪里?

编辑: python 路径似乎与我的 shell 路径不一致。 在每个程序的开头使用 os.environ["PATH"]+=":/the_path/of/ffprobe/dir" 允许我使用 ffprobe,但为什么我的 python 路径可能与我的 shell 路径不同?

您可以使用

import os
print os.environ['PATH']

到 verify/validate ffprobe 在您的 python 环境中。根据你的错误,应该不是。