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91 lines
2.7 KiB
91 lines
2.7 KiB
# -*- coding: UTF-8 -*-
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"""
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Name: ffprobe.py
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Porpose: simple cross-platform wrap for ffprobe
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Compatibility: Python3
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Platform: all platforms
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Author: Gianluca Pernigotto <jeanlucperni@gmail.com>
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Copyright: (c) 2022/2023 Gianluca Pernigotto <jeanlucperni@gmail.com>
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license: GPL3
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Rev: Feb.17.2022
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Code checker: flake8, pylint
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########################################################
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This file is part of FFcuesplitter.
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FFcuesplitter is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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FFcuesplitter is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with FFcuesplitter. If not, see <http://www.gnu.org/licenses/>.
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"""
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import subprocess
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import shlex
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import platform
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import json
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from ffcuesplitter.exceptions import FFProbeError
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from ffcuesplitter.utils import Popen
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def from_kwargs_to_args(kwargs):
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"""
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Helper function to build command line
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arguments out of dict.
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"""
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args = []
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for key in sorted(kwargs.keys()):
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val = kwargs[key]
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args.append(f'-{key}')
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if val is not None:
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args.append(f'{val}')
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return args
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def ffprobe(filename, cmd='ffprobe', **kwargs):
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"""
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Run ffprobe on the specified file and return a
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JSON representation of the output.
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Raises:
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:class:`ffcuesplitter.FFProbeError`: if ffprobe
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returns a non-zero exit code;
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`ffcuesplitter.FFProbeError` from `OSError`,
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`FileNotFoundError` if a generic error.
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Usage:
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ffprobe(filename,
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cmd='/usr/bin oi/ffprobe',
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loglevel='error',
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hide_banner=None,
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etc,
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)
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"""
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args = (f'"{cmd}" -show_format -show_streams -of json '
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f'{" ".join(from_kwargs_to_args(kwargs))} '
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f'"{filename}"'
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)
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args = shlex.split(args) if platform.system() != 'Windows' else args
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try:
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with Popen(args,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE,
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universal_newlines=True,
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) as proc:
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output, error = proc.communicate()
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if proc.returncode != 0:
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raise FFProbeError(f'ffprobe: {error}')
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except (OSError, FileNotFoundError) as excepterr:
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raise FFProbeError(excepterr) from excepterr
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else:
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return json.loads(output)
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