import zlib from typing import Iterator, TextIO, Tuple, List def exact_div(x, y): assert x % y == 0 return x // y def str2bool(string): str2val = {"True": True, "False": False} if string in str2val: return str2val[string] else: raise ValueError(f"Expected one of {set(str2val.keys())}, got {string}") def optional_int(string): return None if string == "None" else int(string) def optional_float(string): return None if string == "None" else float(string) def compression_ratio(text) -> float: text_bytes = text.encode("utf-8") return len(text_bytes) / len(zlib.compress(text_bytes)) def format_timestamp(seconds: float, always_include_hours: bool = False, decimal_marker: str = '.'): assert seconds >= 0, "non-negative timestamp expected" milliseconds = round(seconds * 1000.0) hours = milliseconds // 3_600_000 milliseconds -= hours * 3_600_000 minutes = milliseconds // 60_000 milliseconds -= minutes * 60_000 seconds = milliseconds // 1_000 milliseconds -= seconds * 1_000 hours_marker = f"{hours:02d}:" if always_include_hours or hours > 0 else "" return f"{hours_marker}{minutes:02d}:{seconds:02d}{decimal_marker}{milliseconds:03d}" def write_txt(transcript: Iterator[dict], file: TextIO): for segment in transcript: print(segment['text'].strip(), file=file, flush=True) def write_vtt(transcript: Iterator[dict], file: TextIO): print("WEBVTT\n", file=file) for segment in transcript: print( f"{format_timestamp(segment['start'])} --> {format_timestamp(segment['end'])}\n" f"{segment['text'].strip().replace('-->', '->')}\n", file=file, flush=True, ) def write_srt(transcript: Iterator[dict], file: TextIO): """ Write a transcript to a file in SRT format. Example usage: from pathlib import Path from whisper.utils import write_srt result = transcribe(model, audio_path, temperature=temperature, **args) # save SRT audio_basename = Path(audio_path).stem with open(Path(output_dir) / (audio_basename + ".srt"), "w", encoding="utf-8") as srt: write_srt(result["segments"], file=srt) """ for i, segment in enumerate(transcript, start=1): # write srt lines print( f"{i}\n" f"{format_timestamp(segment['start'], always_include_hours=True, decimal_marker=',')} --> " f"{format_timestamp(segment['end'], always_include_hours=True, decimal_marker=',')}\n" f"{segment['text'].strip().replace('-->', '->')}\n", file=file, flush=True, ) def write_ass(transcript: Iterator[dict], file: TextIO, color: str = None, underline=True, prefmt: str = None, suffmt: str = None, font: str = None, font_size: int = 24, strip=True, **kwargs): """ Credit: https://github.com/jianfch/stable-ts/blob/ff79549bd01f764427879f07ecd626c46a9a430a/stable_whisper/text_output.py Generate Advanced SubStation Alpha (ASS) file from results to display both phrase-level & word-level timestamp simultaneously by: -using segment-level timestamps display phrases as usual -using word-level timestamps change formats (e.g. color/underline) of the word in the displayed segment Note: ass file is used in the same way as srt, vtt, etc. Parameters ---------- res: dict results from modified model ass_path: str output path (e.g. caption.ass) color: str color code for a word at its corresponding timestamp reverse order hexadecimal RGB value (e.g. FF0000 is full intensity blue. Default: 00FF00) underline: bool whether to underline a word at its corresponding timestamp prefmt: str used to specify format for word-level timestamps (must be use with 'suffmt' and overrides 'color'&'underline') appears as such in the .ass file: Hi, {}how{} are you? reference [Appendix A: Style override codes] in http://www.tcax.org/docs/ass-specs.htm suffmt: str used to specify format for word-level timestamps (must be use with 'prefmt' and overrides 'color'&'underline') appears as such in the .ass file: Hi, {}how{} are you? reference [Appendix A: Style override codes] in http://www.tcax.org/docs/ass-specs.htm font: str word font (default: Arial) font_size: int word font size (default: 48) kwargs: used for format styles: 'Name', 'Fontname', 'Fontsize', 'PrimaryColour', 'SecondaryColour', 'OutlineColour', 'BackColour', 'Bold', 'Italic', 'Underline', 'StrikeOut', 'ScaleX', 'ScaleY', 'Spacing', 'Angle', 'BorderStyle', 'Outline', 'Shadow', 'Alignment', 'MarginL', 'MarginR', 'MarginV', 'Encoding' """ fmt_style_dict = {'Name': 'Default', 'Fontname': 'Arial', 'Fontsize': '48', 'PrimaryColour': '&Hffffff', 'SecondaryColour': '&Hffffff', 'OutlineColour': '&H0', 'BackColour': '&H0', 'Bold': '0', 'Italic': '0', 'Underline': '0', 'StrikeOut': '0', 'ScaleX': '100', 'ScaleY': '100', 'Spacing': '0', 'Angle': '0', 'BorderStyle': '1', 'Outline': '1', 'Shadow': '0', 'Alignment': '2', 'MarginL': '10', 'MarginR': '10', 'MarginV': '10', 'Encoding': '0'} for k, v in filter(lambda x: 'colour' in x[0].lower() and not str(x[1]).startswith('&H'), kwargs.items()): kwargs[k] = f'&H{kwargs[k]}' fmt_style_dict.update((k, v) for k, v in kwargs.items() if k in fmt_style_dict) if font: fmt_style_dict.update(Fontname=font) if font_size: fmt_style_dict.update(Fontsize=font_size) fmts = f'Format: {", ".join(map(str, fmt_style_dict.keys()))}' styles = f'Style: {",".join(map(str, fmt_style_dict.values()))}' ass_str = f'[Script Info]\nScriptType: v4.00+\nPlayResX: 384\nPlayResY: 288\nScaledBorderAndShadow: yes\n\n' \ f'[V4+ Styles]\n{fmts}\n{styles}\n\n' \ f'[Events]\nFormat: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text\n\n' if prefmt or suffmt: if suffmt: assert prefmt, 'prefmt must be used along with suffmt' else: suffmt = r'\r' else: if not color: color = 'HFF00' underline_code = r'\u1' if underline else '' prefmt = r'{\1c&' + f'{color.upper()}&{underline_code}' + '}' suffmt = r'{\r}' def secs_to_hhmmss(secs: Tuple[float, int]): mm, ss = divmod(secs, 60) hh, mm = divmod(mm, 60) return f'{hh:0>1.0f}:{mm:0>2.0f}:{ss:0>2.2f}' def dialogue(words: List[str], idx, start, end) -> str: text = ''.join(f' {prefmt}{word}{suffmt}' # if not word.startswith(' ') or word == ' ' else # f' {prefmt}{word.strip()}{suffmt}') if curr_idx == idx else f' {word}' for curr_idx, word in enumerate(words)) return f"Dialogue: 0,{secs_to_hhmmss(start)},{secs_to_hhmmss(end)}," \ f"Default,,0,0,0,,{text.strip() if strip else text}" ass_arr = [] for segment in transcript: curr_words = [wrd['text'] for wrd in segment['word-level']] prev = segment['word-level'][0]['start'] for wdx, word in enumerate(segment['word-level']): if word['start'] is not None: # fill gap between previous word if word['start'] > prev: filler_ts = { "words": curr_words, "start": prev, "end": word['start'], "idx": -1 } ass_arr.append(filler_ts) # highlight current word f_word_ts = { "words": curr_words, "start": word['start'], "end": word['end'], "idx": wdx } ass_arr.append(f_word_ts) prev = word['end'] ass_str += '\n'.join(map(lambda x: dialogue(**x), ass_arr)) file.write(ass_str)