mirror of https://github.com/morpheus65535/bazarr
392 lines
17 KiB
Python
392 lines
17 KiB
Python
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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import argparse
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from datetime import datetime
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import logging
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import os
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import shutil
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import subprocess
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import sys
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import numpy as np
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from .aligners import FFTAligner, MaxScoreAligner, FailedToFindAlignmentException
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from .constants import *
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from .ffmpeg_utils import ffmpeg_bin_path
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from .sklearn_shim import Pipeline
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from .speech_transformers import (
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VideoSpeechTransformer,
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DeserializeSpeechTransformer,
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make_subtitle_speech_pipeline
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)
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from .subtitle_parser import make_subtitle_parser
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from .subtitle_transformers import SubtitleMerger, SubtitleShifter
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from .version import get_version
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logger = logging.getLogger(__name__)
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def override(args, **kwargs):
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args_dict = dict(args.__dict__)
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args_dict.update(kwargs)
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return args_dict
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def _ref_format(ref_fname):
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return ref_fname[-3:]
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def make_test_case(args, npy_savename, sync_was_successful):
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if npy_savename is None:
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raise ValueError('need non-null npy_savename')
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tar_dir = '{}.{}'.format(
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args.reference,
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datetime.now().strftime('%Y-%m-%d-%H-%M-%S')
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)
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logger.info('creating test archive {}.tar.gz...'.format(tar_dir))
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os.mkdir(tar_dir)
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try:
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log_path = 'ffsubsync.log'
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if args.log_dir_path and os.path.isdir(args.log_dir_path):
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log_path = os.path.join(args.log_dir_path, log_path)
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shutil.copy(log_path, tar_dir)
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shutil.copy(args.srtin, tar_dir)
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if sync_was_successful:
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shutil.move(args.srtout, tar_dir)
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if _ref_format(args.reference) in SUBTITLE_EXTENSIONS:
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shutil.copy(args.reference, tar_dir)
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elif args.serialize_speech or args.reference == npy_savename:
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shutil.copy(npy_savename, tar_dir)
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else:
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shutil.move(npy_savename, tar_dir)
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supported_formats = set(list(zip(*shutil.get_archive_formats()))[0])
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preferred_formats = ['gztar', 'bztar', 'xztar', 'zip', 'tar']
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for archive_format in preferred_formats:
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if archive_format in supported_formats:
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shutil.make_archive(tar_dir, archive_format, os.curdir, tar_dir)
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break
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else:
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logger.error('failed to create test archive; no formats supported '
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'(this should not happen)')
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return 1
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logger.info('...done')
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finally:
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shutil.rmtree(tar_dir)
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return 0
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def try_sync(args, reference_pipe, srt_pipes, result):
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sync_was_successful = True
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try:
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logger.info('extracting speech segments from subtitles file %s...', args.srtin)
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for srt_pipe in srt_pipes:
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srt_pipe.fit(args.srtin)
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logger.info('...done')
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logger.info('computing alignments...')
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offset_samples, best_srt_pipe = MaxScoreAligner(
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FFTAligner, SAMPLE_RATE, args.max_offset_seconds
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).fit_transform(
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reference_pipe.transform(args.reference),
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srt_pipes,
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)
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logger.info('...done')
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offset_seconds = offset_samples / float(SAMPLE_RATE)
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scale_step = best_srt_pipe.named_steps['scale']
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logger.info('offset seconds: %.3f', offset_seconds)
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logger.info('framerate scale factor: %.3f', scale_step.scale_factor)
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output_steps = [('shift', SubtitleShifter(offset_seconds))]
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if args.merge_with_reference:
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output_steps.append(
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('merge',
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SubtitleMerger(reference_pipe.named_steps['parse'].subs_))
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)
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output_pipe = Pipeline(output_steps)
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out_subs = output_pipe.fit_transform(scale_step.subs_)
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if args.output_encoding != 'same':
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out_subs = out_subs.set_encoding(args.output_encoding)
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logger.info('writing output to {}'.format(args.srtout or 'stdout'))
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out_subs.write_file(args.srtout)
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except FailedToFindAlignmentException as e:
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sync_was_successful = False
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logger.error(e)
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else:
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result['offset_seconds'] = offset_seconds
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result['framerate_scale_factor'] = scale_step.scale_factor
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finally:
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result['sync_was_successful'] = sync_was_successful
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return sync_was_successful
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def make_reference_pipe(args):
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ref_format = _ref_format(args.reference)
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if ref_format in SUBTITLE_EXTENSIONS:
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if args.vad is not None:
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logger.warning('Vad specified, but reference was not a movie')
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return make_subtitle_speech_pipeline(
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fmt=ref_format,
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**override(
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args,
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encoding=args.reference_encoding or DEFAULT_ENCODING
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)
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)
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elif ref_format in ('npy', 'npz'):
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if args.vad is not None:
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logger.warning('Vad specified, but reference was not a movie')
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return Pipeline([
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('deserialize', DeserializeSpeechTransformer())
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])
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else:
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vad = args.vad or DEFAULT_VAD
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if args.reference_encoding is not None:
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logger.warning('Reference srt encoding specified, but reference was a video file')
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ref_stream = args.reference_stream
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if ref_stream is not None and not ref_stream.startswith('0:'):
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ref_stream = '0:' + ref_stream
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return Pipeline([
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('speech_extract', VideoSpeechTransformer(vad=vad,
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sample_rate=SAMPLE_RATE,
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frame_rate=args.frame_rate,
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start_seconds=args.start_seconds,
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ffmpeg_path=args.ffmpeg_path,
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ref_stream=ref_stream,
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vlc_mode=args.vlc_mode,
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gui_mode=args.gui_mode))
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])
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def make_srt_pipes(args):
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if args.no_fix_framerate:
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framerate_ratios = [1.]
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else:
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framerate_ratios = np.concatenate([
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[1.], np.array(FRAMERATE_RATIOS), 1./np.array(FRAMERATE_RATIOS)
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])
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parser = make_subtitle_parser(fmt=os.path.splitext(args.srtin)[-1][1:], caching=True, **args.__dict__)
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srt_pipes = [
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make_subtitle_speech_pipeline(
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**override(args, scale_factor=scale_factor, parser=parser)
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)
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for scale_factor in framerate_ratios
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]
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return srt_pipes
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def extract_subtitles_from_reference(args):
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stream = args.extract_subs_from_stream
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if not stream.startswith('0:s:'):
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stream = '0:s:{}'.format(stream)
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elif not stream.startswith('0:') and stream.startswith('s:'):
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stream = '0:{}'.format(stream)
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if not stream.startswith('0:s:'):
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logger.error('invalid stream for subtitle extraction: %s', args.extract_subs_from_stream)
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ffmpeg_args = [ffmpeg_bin_path('ffmpeg', args.gui_mode, ffmpeg_resources_path=args.ffmpeg_path)]
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ffmpeg_args.extend([
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'-y',
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'-nostdin',
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'-loglevel', 'fatal',
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'-i', args.reference,
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'-map', '{}'.format(stream),
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'-f', 'srt',
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])
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if args.srtout is None:
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ffmpeg_args.append('-')
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else:
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ffmpeg_args.append(args.srtout)
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logger.info('attempting to extract subtitles to {} ...'.format('stdout' if args.srtout is None else args.srtout))
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retcode = subprocess.call(ffmpeg_args)
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if retcode == 0:
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logger.info('...done')
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else:
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logger.error('ffmpeg unable to extract subtitles from reference; return code %d', retcode)
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return retcode
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def validate_args(args):
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if args.vlc_mode:
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logger.setLevel(logging.CRITICAL)
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if args.make_test_case and not args.gui_mode: # this validation not necessary for gui mode
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if args.srtin is None or args.srtout is None:
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raise ValueError('need to specify input and output srt files for test cases')
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if args.overwrite_input:
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if args.extract_subs_from_stream is not None:
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raise ValueError('input overwriting not allowed for extracting subtitles from reference')
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if args.srtin is None:
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raise ValueError(
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'need to specify input srt if --overwrite-input is specified since we cannot overwrite stdin'
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)
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if args.srtout is not None:
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raise ValueError(
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'overwrite input set but output file specified; refusing to run in case this was not intended'
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)
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if args.extract_subs_from_stream is not None:
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if args.make_test_case:
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raise ValueError('test case is for sync and not subtitle extraction')
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if args.srtin is not None:
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raise ValueError('stream specified for reference subtitle extraction; -i flag for sync input not allowed')
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def validate_file_permissions(args):
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if not os.access(args.reference, os.R_OK):
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raise ValueError('unable to read reference %s (try checking permissions)' % args.reference)
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if not os.access(args.srtin, os.R_OK):
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raise ValueError('unable to read input subtitles %s (try checking permissions)' % args.srtin)
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if os.path.exists(args.srtout) and not os.access(args.srtout, os.W_OK):
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raise ValueError('unable to write output subtitles %s (try checking permissions)' % args.srtout)
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if args.make_test_case or args.serialize_speech:
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npy_savename = os.path.splitext(args.reference)[0] + '.npz'
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if os.path.exists(npy_savename) and not os.access(npy_savename, os.W_OK):
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raise ValueError('unable to write test case file archive %s (try checking permissions)' % npy_savename)
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def run(args):
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result = {
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'retval': 0,
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'offset_seconds': None,
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'framerate_scale_factor': None,
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'sync_was_successful': None
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}
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try:
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validate_args(args)
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except ValueError as e:
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logger.error(e)
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result['retval'] = 1
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return result
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if args.overwrite_input:
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args.srtout = args.srtin
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if args.gui_mode and args.srtout is None:
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args.srtout = '{}.synced.srt'.format(os.path.splitext(args.srtin)[0])
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try:
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validate_file_permissions(args)
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except ValueError as e:
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logger.error(e)
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result['retval'] = 1
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return result
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ref_format = _ref_format(args.reference)
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if args.merge_with_reference and ref_format not in SUBTITLE_EXTENSIONS:
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logger.error('merging synced output with reference only valid '
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'when reference composed of subtitles')
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result['retval'] = 1
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return result
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log_handler = None
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log_path = None
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if args.make_test_case:
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log_path = 'ffsubsync.log'
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if args.log_dir_path and os.path.isdir(args.log_dir_path):
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log_path = os.path.join(args.log_dir_path, log_path)
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log_handler = logging.FileHandler(log_path)
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logger.addHandler(log_handler)
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if args.extract_subs_from_stream is not None:
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result['retval'] = extract_subtitles_from_reference(args)
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return result
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reference_pipe = make_reference_pipe(args)
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logger.info("extracting speech segments from reference '%s'...", args.reference)
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reference_pipe.fit(args.reference)
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logger.info('...done')
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npy_savename = None
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if args.make_test_case or args.serialize_speech:
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logger.info('serializing speech...')
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npy_savename = os.path.splitext(args.reference)[0] + '.npz'
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np.savez_compressed(npy_savename, speech=reference_pipe.transform(args.reference))
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logger.info('...done')
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if args.srtin is None:
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logger.info('unsynchronized subtitle file not specified; skipping synchronization')
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return result
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srt_pipes = make_srt_pipes(args)
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sync_was_successful = try_sync(args, reference_pipe, srt_pipes, result)
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if log_handler is not None and log_path is not None:
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assert args.make_test_case
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log_handler.close()
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logger.removeHandler(log_handler)
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try:
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result['retval'] += make_test_case(args, npy_savename, sync_was_successful)
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finally:
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os.remove(log_path)
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return result
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def add_main_args_for_cli(parser):
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parser.add_argument(
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'reference',
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help='Reference (video, subtitles, or a numpy array with VAD speech) to which to synchronize input subtitles.'
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)
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parser.add_argument('-i', '--srtin', help='Input subtitles file (default=stdin).')
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parser.add_argument('-o', '--srtout', help='Output subtitles file (default=stdout).')
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parser.add_argument('--merge-with-reference', '--merge', action='store_true',
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help='Merge reference subtitles with synced output subtitles.')
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parser.add_argument('--make-test-case', '--create-test-case', action='store_true',
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help='If specified, serialize reference speech to a numpy array, '
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'and create an archive with input/output subtitles '
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'and serialized speech.')
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parser.add_argument(
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'--reference-stream', '--refstream', '--reference-track', '--reftrack',
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default=None,
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help='Which stream/track in the video file to use as reference, '
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'formatted according to ffmpeg conventions. For example, s:0 '
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'uses the first subtitle track; a:3 would use the third audio track.'
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)
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def add_cli_only_args(parser):
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# parser.add_argument('-v', '--version', action='version',
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# version='{package} {version}'.format(package=__package__, version=get_version()))
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parser.add_argument('--overwrite-input', action='store_true',
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help='If specified, will overwrite the input srt instead of writing the output to a new file.')
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parser.add_argument('--encoding', default=DEFAULT_ENCODING,
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help='What encoding to use for reading input subtitles '
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'(default=%s).' % DEFAULT_ENCODING)
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parser.add_argument('--max-subtitle-seconds', type=float, default=DEFAULT_MAX_SUBTITLE_SECONDS,
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help='Maximum duration for a subtitle to appear on-screen '
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'(default=%.3f seconds).' % DEFAULT_MAX_SUBTITLE_SECONDS)
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parser.add_argument('--start-seconds', type=int, default=DEFAULT_START_SECONDS,
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help='Start time for processing '
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'(default=%d seconds).' % DEFAULT_START_SECONDS)
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parser.add_argument('--max-offset-seconds', type=int, default=DEFAULT_MAX_OFFSET_SECONDS,
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help='The max allowed offset seconds for any subtitle segment '
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'(default=%d seconds).' % DEFAULT_MAX_OFFSET_SECONDS)
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parser.add_argument('--frame-rate', type=int, default=DEFAULT_FRAME_RATE,
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help='Frame rate for audio extraction (default=%d).' % DEFAULT_FRAME_RATE)
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parser.add_argument('--output-encoding', default='utf-8',
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help='What encoding to use for writing output subtitles '
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'(default=utf-8). Can indicate "same" to use same '
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'encoding as that of the input.')
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parser.add_argument('--reference-encoding',
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help='What encoding to use for reading / writing reference subtitles '
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'(if applicable, default=infer).')
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parser.add_argument('--vad', choices=['subs_then_webrtc', 'webrtc', 'subs_then_auditok', 'auditok'],
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default=None,
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help='Which voice activity detector to use for speech extraction '
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'(if using video / audio as a reference, default={}).'.format(DEFAULT_VAD))
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parser.add_argument('--no-fix-framerate', action='store_true',
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help='If specified, subsync will not attempt to correct a framerate '
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'mismatch between reference and subtitles.')
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parser.add_argument('--serialize-speech', action='store_true',
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help='If specified, serialize reference speech to a numpy array.')
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parser.add_argument('--extract-subs-from-stream', default=None,
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help='If specified, do not attempt sync; instead, just extract subtitles'
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' from the specified stream using the reference.')
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parser.add_argument(
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'--ffmpeg-path', '--ffmpegpath', default=None,
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help='Where to look for ffmpeg and ffprobe. Uses the system PATH by default.'
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)
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parser.add_argument('--log-dir-path', default=None, help='Where to save ffsubsync.log file (must be an existing '
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'directory).')
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parser.add_argument('--vlc-mode', action='store_true', help=argparse.SUPPRESS)
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parser.add_argument('--gui-mode', action='store_true', help=argparse.SUPPRESS)
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def make_parser():
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parser = argparse.ArgumentParser(description='Synchronize subtitles with video.')
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add_main_args_for_cli(parser)
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add_cli_only_args(parser)
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return parser
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def main():
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parser = make_parser()
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args = parser.parse_args()
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return run(args)['retval']
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if __name__ == "__main__":
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sys.exit(main())
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