import subprocess import functools import shutil import logging from typing import Dict, Union from . import exiftool from . import bubblewrap class AbstractFFmpegParser(exiftool.ExiftoolParser): """ Abstract parser for all FFmpeg-based ones, mainly for video. """ # Some fileformats have mandatory metadata fields meta_key_value_allowlist = {} # type: Dict[str, Union[str, int]] def remove_all(self) -> bool: if self.meta_key_value_allowlist: logging.warning('The format of "%s" (%s) has some mandatory ' 'metadata fields; mat2 filled them with standard ' 'data.', self.filename, ', '.join(self.mimetypes)) cmd = [_get_ffmpeg_path(), '-i', self.filename, # input file '-y', # overwrite existing output file '-map', '0', # copy everything all streams from input to output '-codec', 'copy', # don't decode anything, just copy (speed!) '-loglevel', 'panic', # Don't show log '-hide_banner', # hide the banner '-map_metadata', '-1', # remove supperficial metadata '-map_chapters', '-1', # remove chapters '-disposition', '0', # Remove dispositions (check ffmpeg's manpage) '-fflags', '+bitexact', # don't add any metadata '-flags:v', '+bitexact', # don't add any metadata '-flags:a', '+bitexact', # don't add any metadata self.output_filename] try: if self.sandbox: bubblewrap.run(cmd, check=True, input_filename=self.filename, output_filename=self.output_filename) else: subprocess.run(cmd, check=True) except subprocess.CalledProcessError as e: logging.error("Something went wrong during the processing of %s: %s", self.filename, e) return False return True def get_meta(self) -> Dict[str, Union[str, dict]]: meta = super().get_meta() ret = dict() # type: Dict[str, Union[str, dict]] for key, value in meta.items(): if key in self.meta_key_value_allowlist: if value == self.meta_key_value_allowlist[key]: continue ret[key] = value return ret class WMVParser(AbstractFFmpegParser): mimetypes = {'video/x-ms-wmv', } meta_allowlist = {'AudioChannels', 'AudioCodecID', 'AudioCodecName', 'ErrorCorrectionType', 'AudioSampleRate', 'DataPackets', 'Directory', 'Duration', 'ExifToolVersion', 'FileAccessDate', 'FileInodeChangeDate', 'FileLength', 'FileModifyDate', 'FileName', 'FilePermissions', 'FileSize', 'FileType', 'FileTypeExtension', 'FrameCount', 'FrameRate', 'ImageHeight', 'ImageSize', 'ImageWidth', 'MIMEType', 'MaxBitrate', 'MaxPacketSize', 'Megapixels', 'MinPacketSize', 'Preroll', 'SendDuration', 'SourceFile', 'StreamNumber', 'VideoCodecName', } meta_key_value_allowlist = { # some metadata are mandatory :/ 'AudioCodecDescription': '', 'CreationDate': '0000:00:00 00:00:00Z', 'FileID': '00000000-0000-0000-0000-000000000000', 'Flags': 2, # FIXME: What is this? Why 2? 'ModifyDate': '0000:00:00 00:00:00', 'TimeOffset': '0 s', 'VideoCodecDescription': '', 'StreamType': 'Audio', } class AVIParser(AbstractFFmpegParser): mimetypes = {'video/x-msvideo', } meta_allowlist = {'SourceFile', 'ExifToolVersion', 'FileName', 'Directory', 'FileSize', 'FileModifyDate', 'FileAccessDate', 'FileInodeChangeDate', 'FilePermissions', 'FileType', 'FileTypeExtension', 'MIMEType', 'FrameRate', 'MaxDataRate', 'FrameCount', 'StreamCount', 'StreamType', 'VideoCodec', 'VideoFrameRate', 'VideoFrameCount', 'Quality', 'SampleSize', 'BMPVersion', 'ImageWidth', 'ImageHeight', 'Planes', 'BitDepth', 'Compression', 'ImageLength', 'PixelsPerMeterX', 'PixelsPerMeterY', 'NumColors', 'NumImportantColors', 'NumColors', 'NumImportantColors', 'RedMask', 'GreenMask', 'BlueMask', 'AlphaMask', 'ColorSpace', 'AudioCodec', 'AudioCodecRate', 'AudioSampleCount', 'AudioSampleCount', 'AudioSampleRate', 'Encoding', 'NumChannels', 'SampleRate', 'AvgBytesPerSec', 'BitsPerSample', 'Duration', 'ImageSize', 'Megapixels'} class MP4Parser(AbstractFFmpegParser): mimetypes = {'video/mp4', } meta_allowlist = {'AudioFormat', 'AvgBitrate', 'Balance', 'TrackDuration', 'XResolution', 'YResolution', 'ExifToolVersion', 'FileAccessDate', 'FileInodeChangeDate', 'FileModifyDate', 'FileName', 'FilePermissions', 'MIMEType', 'FileType', 'FileTypeExtension', 'Directory', 'ImageWidth', 'ImageSize', 'ImageHeight', 'FileSize', 'SourceFile', 'BitDepth', 'Duration', 'AudioChannels', 'AudioBitsPerSample', 'AudioSampleRate', 'Megapixels', 'MovieDataSize', 'VideoFrameRate', 'MediaTimeScale', 'SourceImageHeight', 'SourceImageWidth', 'MatrixStructure', 'MediaDuration'} meta_key_value_allowlist = { # some metadata are mandatory :/ 'CreateDate': '0000:00:00 00:00:00', 'CurrentTime': '0 s', 'MediaCreateDate': '0000:00:00 00:00:00', 'MediaLanguageCode': 'und', 'MediaModifyDate': '0000:00:00 00:00:00', 'ModifyDate': '0000:00:00 00:00:00', 'OpColor': '0 0 0', 'PosterTime': '0 s', 'PreferredRate': '1', 'PreferredVolume': '100.00%', 'PreviewDuration': '0 s', 'PreviewTime': '0 s', 'SelectionDuration': '0 s', 'SelectionTime': '0 s', 'TrackCreateDate': '0000:00:00 00:00:00', 'TrackModifyDate': '0000:00:00 00:00:00', 'TrackVolume': '0.00%', } @functools.lru_cache() def _get_ffmpeg_path() -> str: # pragma: no cover which_path = shutil.which('ffmpeg') if which_path: return which_path raise RuntimeError("Unable to find ffmpeg")