mirror of
https://github.com/m-bain/whisperX.git
synced 2025-07-01 18:17:27 -04:00
224 lines
8.2 KiB
Python
224 lines
8.2 KiB
Python
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
|
|
<bbggrr> 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, {<prefmt>}how{<suffmt>} 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, {<prefmt>}how{<suffmt>} 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)
|