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529 lines
21 KiB
529 lines
21 KiB
3 years ago
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# vim: set fileencoding=utf-8 :
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"""
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This module is a wrapper around the MediaInfo library.
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"""
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import ctypes
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import json
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import os
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import pathlib
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import re
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import sys
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import warnings
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import xml.etree.ElementTree as ET
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from typing import Any, Dict, List, Optional, Tuple, Union
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try:
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from importlib import metadata
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except ImportError:
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import importlib_metadata as metadata # type: ignore
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try:
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__version__ = metadata.version("pymediainfo")
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except metadata.PackageNotFoundError:
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__version__ = ""
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class Track:
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"""
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An object associated with a media file track.
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Each :class:`Track` attribute corresponds to attributes parsed from MediaInfo's output.
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All attributes are lower case. Attributes that are present several times such as `Duration`
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yield a second attribute starting with `other_` which is a list of all alternative
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attribute values.
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When a non-existing attribute is accessed, `None` is returned.
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Example:
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>>> t = mi.tracks[0]
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>>> t
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<Track track_id='None', track_type='General'>
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>>> t.duration
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3000
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>>> t.other_duration
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['3 s 0 ms', '3 s 0 ms', '3 s 0 ms',
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'00:00:03.000', '00:00:03.000']
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>>> type(t.non_existing)
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NoneType
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All available attributes can be obtained by calling :func:`to_data`.
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"""
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def __eq__(self, other): # type: ignore
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return self.__dict__ == other.__dict__
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def __getattribute__(self, name): # type: ignore
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try:
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return object.__getattribute__(self, name)
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except AttributeError:
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pass
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return None
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def __getstate__(self): # type: ignore
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return self.__dict__
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def __setstate__(self, state): # type: ignore
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self.__dict__ = state
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def __init__(self, xml_dom_fragment: ET.Element):
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self.track_type = xml_dom_fragment.attrib["type"]
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repeated_attributes = []
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for elem in xml_dom_fragment:
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node_name = elem.tag.lower().strip().strip("_")
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if node_name == "id":
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node_name = "track_id"
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node_value = elem.text
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if getattr(self, node_name) is None:
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setattr(self, node_name, node_value)
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else:
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other_node_name = f"other_{node_name}"
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repeated_attributes.append((node_name, other_node_name))
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if getattr(self, other_node_name) is None:
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setattr(self, other_node_name, [node_value])
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else:
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getattr(self, other_node_name).append(node_value)
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for primary_key, other_key in repeated_attributes:
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try:
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# Attempt to convert the main value to int
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# Usually, if an attribute is repeated, one of its value
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# is an int and others are human-readable formats
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setattr(self, primary_key, int(getattr(self, primary_key)))
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except ValueError:
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# If it fails, try to find a secondary value
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# that is an int and swap it with the main value
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for other_value in getattr(self, other_key):
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try:
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current = getattr(self, primary_key)
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# Set the main value to an int
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setattr(self, primary_key, int(other_value))
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# Append its previous value to other values
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getattr(self, other_key).append(current)
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break
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except ValueError:
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pass
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def __repr__(self): # type: ignore
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return "<Track track_id='{}', track_type='{}'>".format(self.track_id, self.track_type)
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def to_data(self) -> Dict[str, Any]:
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"""
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Returns a dict representation of the track attributes.
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Example:
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>>> sorted(track.to_data().keys())[:3]
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['codec', 'codec_extensions_usually_used', 'codec_url']
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>>> t.to_data()["file_size"]
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5988
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:rtype: dict
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"""
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return self.__dict__
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class MediaInfo:
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"""
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An object containing information about a media file.
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:class:`MediaInfo` objects can be created by directly calling code from
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libmediainfo (in this case, the library must be present on the system):
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>>> pymediainfo.MediaInfo.parse("/path/to/file.mp4")
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Alternatively, objects may be created from MediaInfo's XML output.
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Such output can be obtained using the ``XML`` output format on versions older than v17.10
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and the ``OLDXML`` format on newer versions.
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Using such an XML file, we can create a :class:`MediaInfo` object:
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>>> with open("output.xml") as f:
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... mi = pymediainfo.MediaInfo(f.read())
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:param str xml: XML output obtained from MediaInfo.
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:param str encoding_errors: option to pass to :func:`str.encode`'s `errors`
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parameter before parsing `xml`.
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:raises xml.etree.ElementTree.ParseError: if passed invalid XML.
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:var tracks: A list of :py:class:`Track` objects which the media file contains.
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For instance:
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>>> mi = pymediainfo.MediaInfo.parse("/path/to/file.mp4")
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>>> for t in mi.tracks:
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... print(t)
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<Track track_id='None', track_type='General'>
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<Track track_id='1', track_type='Text'>
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"""
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def __eq__(self, other): # type: ignore
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return self.tracks == other.tracks
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def __init__(self, xml: str, encoding_errors: str = "strict"):
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xml_dom = ET.fromstring(xml.encode("utf-8", encoding_errors))
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self.tracks = []
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# This is the case for libmediainfo < 18.03
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# https://github.com/sbraz/pymediainfo/issues/57
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# https://github.com/MediaArea/MediaInfoLib/commit/575a9a32e6960ea34adb3bc982c64edfa06e95eb
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if xml_dom.tag == "File":
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xpath = "track"
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else:
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xpath = "File/track"
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for xml_track in xml_dom.iterfind(xpath):
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self.tracks.append(Track(xml_track))
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def _tracks(self, track_type: str) -> List[Track]:
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return [track for track in self.tracks if track.track_type == track_type]
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@property
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def general_tracks(self) -> List[Track]:
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"""
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:return: All :class:`Track`\\s of type ``General``.
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:rtype: list of :class:`Track`\\s
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"""
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return self._tracks("General")
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@property
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def video_tracks(self) -> List[Track]:
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"""
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:return: All :class:`Track`\\s of type ``Video``.
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:rtype: list of :class:`Track`\\s
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"""
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return self._tracks("Video")
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@property
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def audio_tracks(self) -> List[Track]:
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"""
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:return: All :class:`Track`\\s of type ``Audio``.
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:rtype: list of :class:`Track`\\s
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"""
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return self._tracks("Audio")
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@property
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def text_tracks(self) -> List[Track]:
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"""
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:return: All :class:`Track`\\s of type ``Text``.
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:rtype: list of :class:`Track`\\s
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"""
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return self._tracks("Text")
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@property
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def other_tracks(self) -> List[Track]:
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"""
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:return: All :class:`Track`\\s of type ``Other``.
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:rtype: list of :class:`Track`\\s
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"""
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return self._tracks("Other")
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@property
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def image_tracks(self) -> List[Track]:
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"""
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:return: All :class:`Track`\\s of type ``Image``.
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:rtype: list of :class:`Track`\\s
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"""
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return self._tracks("Image")
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@property
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def menu_tracks(self) -> List[Track]:
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"""
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:return: All :class:`Track`\\s of type ``Menu``.
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:rtype: list of :class:`Track`\\s
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"""
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return self._tracks("Menu")
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@staticmethod
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def _normalize_filename(filename: Any) -> Any:
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if hasattr(os, "PathLike") and isinstance(filename, os.PathLike):
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return os.fspath(filename)
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if pathlib is not None and isinstance(filename, pathlib.PurePath):
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return str(filename)
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return filename
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@classmethod
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def _define_library_prototypes(cls, lib: Any) -> Any:
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lib.MediaInfo_Inform.restype = ctypes.c_wchar_p
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lib.MediaInfo_New.argtypes = []
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lib.MediaInfo_New.restype = ctypes.c_void_p
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lib.MediaInfo_Option.argtypes = [
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ctypes.c_void_p,
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ctypes.c_wchar_p,
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ctypes.c_wchar_p,
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]
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lib.MediaInfo_Option.restype = ctypes.c_wchar_p
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lib.MediaInfo_Inform.argtypes = [ctypes.c_void_p, ctypes.c_size_t]
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lib.MediaInfo_Inform.restype = ctypes.c_wchar_p
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lib.MediaInfo_Open.argtypes = [ctypes.c_void_p, ctypes.c_wchar_p]
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lib.MediaInfo_Open.restype = ctypes.c_size_t
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lib.MediaInfo_Open_Buffer_Init.argtypes = [
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ctypes.c_void_p,
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ctypes.c_uint64,
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ctypes.c_uint64,
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]
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lib.MediaInfo_Open_Buffer_Init.restype = ctypes.c_size_t
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lib.MediaInfo_Open_Buffer_Continue.argtypes = [
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ctypes.c_void_p,
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ctypes.c_char_p,
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ctypes.c_size_t,
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]
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lib.MediaInfo_Open_Buffer_Continue.restype = ctypes.c_size_t
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lib.MediaInfo_Open_Buffer_Continue_GoTo_Get.argtypes = [ctypes.c_void_p]
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lib.MediaInfo_Open_Buffer_Continue_GoTo_Get.restype = ctypes.c_uint64
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lib.MediaInfo_Open_Buffer_Finalize.argtypes = [ctypes.c_void_p]
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lib.MediaInfo_Open_Buffer_Finalize.restype = ctypes.c_size_t
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lib.MediaInfo_Delete.argtypes = [ctypes.c_void_p]
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lib.MediaInfo_Delete.restype = None
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lib.MediaInfo_Close.argtypes = [ctypes.c_void_p]
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lib.MediaInfo_Close.restype = None
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@staticmethod
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def _get_library_paths(os_is_nt: bool) -> Tuple[str]:
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if os_is_nt:
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library_paths = ("MediaInfo.dll",)
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elif sys.platform == "darwin":
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library_paths = ("libmediainfo.0.dylib", "libmediainfo.dylib")
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else:
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library_paths = ("libmediainfo.so.0",)
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script_dir = os.path.dirname(__file__)
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# Look for the library file in the script folder
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for library in library_paths:
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absolute_library_path = os.path.join(script_dir, library)
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if os.path.isfile(absolute_library_path):
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# If we find it, don't try any other filename
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library_paths = (absolute_library_path,)
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break
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return library_paths
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@classmethod
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def _get_library(
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cls,
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library_file: Optional[str] = None,
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) -> Tuple[Any, Any, str, Tuple[int, ...]]:
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os_is_nt = os.name in ("nt", "dos", "os2", "ce")
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if os_is_nt:
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lib_type = ctypes.WinDLL # type: ignore
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else:
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lib_type = ctypes.CDLL
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if library_file is None:
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library_paths = cls._get_library_paths(os_is_nt)
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else:
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library_paths = (library_file,)
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exceptions = []
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for library_path in library_paths:
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try:
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lib = lib_type(library_path)
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cls._define_library_prototypes(lib)
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# Without a handle, there might be problems when using concurrent threads
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# https://github.com/sbraz/pymediainfo/issues/76#issuecomment-574759621
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handle = lib.MediaInfo_New()
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version = lib.MediaInfo_Option(handle, "Info_Version", "")
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match = re.search(r"^MediaInfoLib - v(\S+)", version)
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if match:
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lib_version_str = match.group(1)
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lib_version = tuple(int(_) for _ in lib_version_str.split("."))
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else:
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raise RuntimeError("Could not determine library version")
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return (lib, handle, lib_version_str, lib_version)
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except OSError as exc:
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exceptions.append(str(exc))
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raise OSError(
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"Failed to load library from {} - {}".format(
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", ".join(library_paths), ", ".join(exceptions)
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)
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)
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@classmethod
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def can_parse(cls, library_file: Optional[str] = None) -> bool:
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"""
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Checks whether media files can be analyzed using libmediainfo.
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:param str library_file: path to the libmediainfo library, this should only be used if
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the library cannot be auto-detected.
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:rtype: bool
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"""
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try:
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lib, handle = cls._get_library(library_file)[:2]
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lib.MediaInfo_Close(handle)
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lib.MediaInfo_Delete(handle)
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return True
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except Exception: # pylint: disable=broad-except
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return False
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@classmethod
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def parse(
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# pylint: disable=too-many-statements
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# pylint: disable=too-many-branches, too-many-locals, too-many-arguments
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|
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cls,
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filename: Any,
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library_file: Optional[str] = None,
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cover_data: bool = False,
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encoding_errors: str = "strict",
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parse_speed: float = 0.5,
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|
|
full: bool = True,
|
||
|
|
legacy_stream_display: bool = False,
|
||
|
|
mediainfo_options: Optional[Dict[str, str]] = None,
|
||
|
|
output: Optional[str] = None,
|
||
|
|
) -> Union[str, "MediaInfo"]:
|
||
|
|
"""
|
||
|
|
Analyze a media file using libmediainfo.
|
||
|
|
|
||
|
|
.. note::
|
||
|
|
Because of the way the underlying library works, this method should not
|
||
|
|
be called simultaneously from multiple threads *with different arguments*.
|
||
|
|
Doing so will cause inconsistencies or failures by changing
|
||
|
|
library options that are shared across threads.
|
||
|
|
|
||
|
|
:param filename: path to the media file or file-like object which will be analyzed.
|
||
|
|
A URL can also be used if libmediainfo was compiled
|
||
|
|
with CURL support.
|
||
|
|
:param str library_file: path to the libmediainfo library, this should only be used if
|
||
|
|
the library cannot be auto-detected.
|
||
|
|
:param bool cover_data: whether to retrieve cover data as base64.
|
||
|
|
:param str encoding_errors: option to pass to :func:`str.encode`'s `errors`
|
||
|
|
parameter before parsing MediaInfo's XML output.
|
||
|
|
:param float parse_speed: passed to the library as `ParseSpeed`,
|
||
|
|
this option takes values between 0 and 1.
|
||
|
|
A higher value will yield more precise results in some cases
|
||
|
|
but will also increase parsing time.
|
||
|
|
:param bool full: display additional tags, including computer-readable values
|
||
|
|
for sizes and durations.
|
||
|
|
:param bool legacy_stream_display: display additional information about streams.
|
||
|
|
:param dict mediainfo_options: additional options that will be passed to the
|
||
|
|
`MediaInfo_Option` function, for example: ``{"Language": "raw"}``.
|
||
|
|
Do not use this parameter when running the method simultaneously from multiple threads,
|
||
|
|
it will trigger a reset of all options which will cause inconsistencies or failures.
|
||
|
|
:param str output: custom output format for MediaInfo, corresponds to the CLI's
|
||
|
|
``--Output`` parameter. Setting this causes the method to
|
||
|
|
return a `str` instead of a :class:`MediaInfo` object.
|
||
|
|
|
||
|
|
Useful values include:
|
||
|
|
* the empty `str` ``""`` (corresponds to the default
|
||
|
|
text output, obtained when running ``mediainfo`` with no
|
||
|
|
additional parameters)
|
||
|
|
|
||
|
|
* ``"XML"``
|
||
|
|
|
||
|
|
* ``"JSON"``
|
||
|
|
|
||
|
|
* ``%``-delimited templates (see ``mediainfo --Info-Parameters``)
|
||
|
|
:type filename: str or pathlib.Path or os.PathLike or file-like object.
|
||
|
|
:rtype: str if `output` is set.
|
||
|
|
:rtype: :class:`MediaInfo` otherwise.
|
||
|
|
:raises FileNotFoundError: if passed a non-existent file.
|
||
|
|
:raises ValueError: if passed a file-like object opened in text mode.
|
||
|
|
:raises OSError: if the library file could not be loaded.
|
||
|
|
:raises RuntimeError: if parsing fails, this should not
|
||
|
|
happen unless libmediainfo itself fails.
|
||
|
|
|
||
|
|
Examples:
|
||
|
|
>>> pymediainfo.MediaInfo.parse("tests/data/sample.mkv")
|
||
|
|
<pymediainfo.MediaInfo object at 0x7fa83a3db240>
|
||
|
|
|
||
|
|
>>> import json
|
||
|
|
>>> mi = pymediainfo.MediaInfo.parse("tests/data/sample.mkv",
|
||
|
|
... output="JSON")
|
||
|
|
>>> json.loads(mi)["media"]["track"][0]
|
||
|
|
{'@type': 'General', 'TextCount': '1', 'FileExtension': 'mkv',
|
||
|
|
'FileSize': '5904', … }
|
||
|
|
|
||
|
|
|
||
|
|
"""
|
||
|
|
lib, handle, lib_version_str, lib_version = cls._get_library(library_file)
|
||
|
|
# The XML option was renamed starting with version 17.10
|
||
|
|
if lib_version >= (17, 10):
|
||
|
|
xml_option = "OLDXML"
|
||
|
|
else:
|
||
|
|
xml_option = "XML"
|
||
|
|
# Cover_Data is not extracted by default since version 18.03
|
||
|
|
# See https://github.com/MediaArea/MediaInfoLib/commit/d8fd88a1
|
||
|
|
if lib_version >= (18, 3):
|
||
|
|
lib.MediaInfo_Option(handle, "Cover_Data", "base64" if cover_data else "")
|
||
|
|
lib.MediaInfo_Option(handle, "CharSet", "UTF-8")
|
||
|
|
lib.MediaInfo_Option(handle, "Inform", xml_option if output is None else output)
|
||
|
|
lib.MediaInfo_Option(handle, "Complete", "1" if full else "")
|
||
|
|
lib.MediaInfo_Option(handle, "ParseSpeed", str(parse_speed))
|
||
|
|
lib.MediaInfo_Option(handle, "LegacyStreamDisplay", "1" if legacy_stream_display else "")
|
||
|
|
if mediainfo_options is not None:
|
||
|
|
if lib_version < (19, 9):
|
||
|
|
warnings.warn(
|
||
|
|
"This version of MediaInfo (v{}) does not support resetting all "
|
||
|
|
"options to their default values, passing it custom options is not recommended "
|
||
|
|
"and may result in unpredictable behavior, see "
|
||
|
|
"https://github.com/MediaArea/MediaInfoLib/issues/1128".format(lib_version_str),
|
||
|
|
RuntimeWarning,
|
||
|
|
)
|
||
|
|
for option_name, option_value in mediainfo_options.items():
|
||
|
|
lib.MediaInfo_Option(handle, option_name, option_value)
|
||
|
|
try:
|
||
|
|
filename.seek(0, 2)
|
||
|
|
file_size = filename.tell()
|
||
|
|
filename.seek(0)
|
||
|
|
except AttributeError: # filename is not a file-like object
|
||
|
|
file_size = None
|
||
|
|
|
||
|
|
if file_size is not None: # We have a file-like object, use the buffer protocol:
|
||
|
|
# Some file-like objects do not have a mode
|
||
|
|
if "b" not in getattr(filename, "mode", "b"):
|
||
|
|
raise ValueError("File should be opened in binary mode")
|
||
|
|
lib.MediaInfo_Open_Buffer_Init(handle, file_size, 0)
|
||
|
|
while True:
|
||
|
|
buffer = filename.read(64 * 1024)
|
||
|
|
if buffer:
|
||
|
|
# https://github.com/MediaArea/MediaInfoLib/blob/v20.09/Source/MediaInfo/File__Analyze.h#L1429
|
||
|
|
# 4th bit = finished
|
||
|
|
if lib.MediaInfo_Open_Buffer_Continue(handle, buffer, len(buffer)) & 0x08:
|
||
|
|
break
|
||
|
|
# Ask MediaInfo if we need to seek
|
||
|
|
seek = lib.MediaInfo_Open_Buffer_Continue_GoTo_Get(handle)
|
||
|
|
# https://github.com/MediaArea/MediaInfoLib/blob/v20.09/Source/MediaInfoDLL/MediaInfoJNI.cpp#L127
|
||
|
|
if seek != ctypes.c_uint64(-1).value:
|
||
|
|
filename.seek(seek)
|
||
|
|
# Inform MediaInfo we have sought
|
||
|
|
lib.MediaInfo_Open_Buffer_Init(handle, file_size, filename.tell())
|
||
|
|
else:
|
||
|
|
break
|
||
|
|
lib.MediaInfo_Open_Buffer_Finalize(handle)
|
||
|
|
else: # We have a filename, simply pass it:
|
||
|
|
filename = cls._normalize_filename(filename)
|
||
|
|
# If an error occured
|
||
|
|
if lib.MediaInfo_Open(handle, filename) == 0:
|
||
|
|
lib.MediaInfo_Close(handle)
|
||
|
|
lib.MediaInfo_Delete(handle)
|
||
|
|
# If filename doesn't look like a URL and doesn't exist
|
||
|
|
if "://" not in filename and not os.path.exists(filename):
|
||
|
|
raise FileNotFoundError(filename)
|
||
|
|
# We ran into another kind of error
|
||
|
|
raise RuntimeError(
|
||
|
|
"An error occured while opening {}" " with libmediainfo".format(filename)
|
||
|
|
)
|
||
|
|
info: str = lib.MediaInfo_Inform(handle, 0)
|
||
|
|
# Reset all options to their defaults so that they aren't
|
||
|
|
# retained when the parse method is called several times
|
||
|
|
# https://github.com/MediaArea/MediaInfoLib/issues/1128
|
||
|
|
# Do not call it when it is not required because it breaks threads
|
||
|
|
# https://github.com/sbraz/pymediainfo/issues/76#issuecomment-575245093
|
||
|
|
if mediainfo_options is not None and lib_version >= (19, 9):
|
||
|
|
lib.MediaInfo_Option(handle, "Reset", "")
|
||
|
|
# Delete the handle
|
||
|
|
lib.MediaInfo_Close(handle)
|
||
|
|
lib.MediaInfo_Delete(handle)
|
||
|
|
if output is None:
|
||
|
|
return cls(info, encoding_errors)
|
||
|
|
return info
|
||
|
|
|
||
|
|
def to_data(self) -> Dict[str, Any]:
|
||
|
|
"""
|
||
|
|
Returns a dict representation of the object's :py:class:`Tracks <Track>`.
|
||
|
|
|
||
|
|
:rtype: dict
|
||
|
|
"""
|
||
|
|
return {"tracks": [_.to_data() for _ in self.tracks]}
|
||
|
|
|
||
|
|
def to_json(self) -> str:
|
||
|
|
"""
|
||
|
|
Returns a JSON representation of the object's :py:class:`Tracks <Track>`.
|
||
|
|
|
||
|
|
:rtype: str
|
||
|
|
"""
|
||
|
|
return json.dumps(self.to_data())
|