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import os
import tqdm
import time
import numpy as np
from typing import BinaryIO, Union, Tuple
from datetime import datetime, timedelta
import faster_whisper
import whisper
import torch
import gradio as gr
from .base_interface import BaseInterface
from modules.subtitle_manager import get_srt, get_vtt, write_file, safe_filename
from modules.youtube_manager import get_ytdata, get_ytaudio
class FasterWhisperInference(BaseInterface):
def __init__(self):
super().__init__()
self.current_model_size = None
self.model = None
self.available_models = whisper.available_models()
self.available_langs = sorted(list(whisper.tokenizer.LANGUAGES.values()))
self.translatable_models = ["large", "large-v1", "large-v2"]
self.default_beam_size = 5
self.device = "cuda" if torch.cuda.is_available() else "cpu"
def transcribe_file(self,
fileobjs: list,
model_size: str,
lang: str,
subformat: str,
istranslate: bool,
add_timestamp: bool,
progress=gr.Progress()
) -> str:
"""
Write subtitle file from Files
Parameters
----------
fileobjs: list
List of files to transcribe from gr.Files()
model_size: str
Whisper model size from gr.Dropdown()
lang: str
Source language of the file to transcribe from gr.Dropdown()
subformat: str
Subtitle format to write from gr.Dropdown(). Supported format: [SRT, WebVTT]
istranslate: bool
Boolean value from gr.Checkbox() that determines whether to translate to English.
It's Whisper's feature to translate speech from another language directly into English end-to-end.
add_timestamp: bool
Boolean value from gr.Checkbox() that determines whether to add a timestamp at the end of the filename.
progress: gr.Progress
Indicator to show progress directly in gradio.
Returns
----------
String to return to gr.Textbox()
"""
try:
if model_size != self.current_model_size or self.model is None:
self.initialize_model(model_size=model_size, progress=progress)
if lang == "Automatic Detection":
lang = None
files_info = {}
for fileobj in fileobjs:
transcribed_segments, time_for_task = self.transcribe(
audio=fileobj.name,
lang=lang,
istranslate=istranslate,
progress=progress
)
file_name, file_ext = os.path.splitext(os.path.basename(fileobj.orig_name))
file_name = safe_filename(file_name)
subtitle = self.generate_and_write_subtitle(
file_name=file_name,
transcribed_segments=transcribed_segments,
add_timestamp=add_timestamp,
subformat=subformat
)
files_info[file_name] = {"subtitle": subtitle, "time_for_task": time_for_task}
total_result = ''
total_time = 0
for file_name, info in files_info.items():
total_result += '------------------------------------\n'
total_result += f'{file_name}\n\n'
total_result += f'{info["subtitle"]}'
total_time += info["time_for_task"]
return f"Done in {self.format_time(total_time)}! Subtitle is in the outputs folder.\n\n{total_result}"
except Exception as e:
print(f"Error transcribing file on line {e}")
finally:
self.release_cuda_memory()
self.remove_input_files([fileobj.name for fileobj in fileobjs])
def transcribe_youtube(self,
youtubelink: str,
model_size: str,
lang: str,
subformat: str,
istranslate: bool,
add_timestamp: bool,
progress=gr.Progress()
) -> str:
"""
Write subtitle file from Youtube
Parameters
----------
youtubelink: str
Link of Youtube to transcribe from gr.Textbox()
model_size: str
Whisper model size from gr.Dropdown()
lang: str
Source language of the file to transcribe from gr.Dropdown()
subformat: str
Subtitle format to write from gr.Dropdown(). Supported format: [SRT, WebVTT]
istranslate: bool
Boolean value from gr.Checkbox() that determines whether to translate to English.
It's Whisper's feature to translate speech from another language directly into English end-to-end.
add_timestamp: bool
Boolean value from gr.Checkbox() that determines whether to add a timestamp at the end of the filename.
progress: gr.Progress
Indicator to show progress directly in gradio.
Returns
----------
String to return to gr.Textbox()
"""
try:
if model_size != self.current_model_size or self.model is None:
self.initialize_model(model_size=model_size, progress=progress)
if lang == "Automatic Detection":
lang = None
progress(0, desc="Loading Audio from Youtube..")
yt = get_ytdata(youtubelink)
audio = get_ytaudio(yt)
transcribed_segments, time_for_task = self.transcribe(
audio=audio,
lang=lang,
istranslate=istranslate,
progress=progress
)
progress(1, desc="Completed!")
file_name = safe_filename(yt.title)
subtitle = self.generate_and_write_subtitle(
file_name=file_name,
transcribed_segments=transcribed_segments,
add_timestamp=add_timestamp,
subformat=subformat
)
return f"Done in {self.format_time(time_for_task)}! Subtitle file is in the outputs folder.\n\n{subtitle}"
except Exception as e:
return f"Error: {str(e)}"
finally:
yt = get_ytdata(youtubelink)
file_path = get_ytaudio(yt)
self.release_cuda_memory()
self.remove_input_files([file_path])
def transcribe_mic(self,
micaudio: str,
model_size: str,
lang: str,
subformat: str,
istranslate: bool,
progress=gr.Progress()
) -> str:
"""
Write subtitle file from microphone
Parameters
----------
micaudio: str
Audio file path from gr.Microphone()
model_size: str
Whisper model size from gr.Dropdown()
lang: str
Source language of the file to transcribe from gr.Dropdown()
subformat: str
Subtitle format to write from gr.Dropdown(). Supported format: [SRT, WebVTT]
istranslate: bool
Boolean value from gr.Checkbox() that determines whether to translate to English.
It's Whisper's feature to translate speech from another language directly into English end-to-end.
progress: gr.Progress
Indicator to show progress directly in gradio.
Returns
----------
String to return to gr.Textbox()
"""
try:
if model_size != self.current_model_size or self.model is None:
self.initialize_model(model_size=model_size, progress=progress)
if lang == "Automatic Detection":
lang = None
progress(0, desc="Loading Audio..")
transcribed_segments, time_for_task = self.transcribe(
audio=micaudio,
lang=lang,
istranslate=istranslate,
progress=progress
)
progress(1, desc="Completed!")
subtitle = self.generate_and_write_subtitle(
file_name="Mic",
transcribed_segments=transcribed_segments,
add_timestamp=True,
subformat=subformat
)
return f"Done in {self.format_time(time_for_task)}! Subtitle file is in the outputs folder.\n\n{subtitle}"
except Exception as e:
return f"Error: {str(e)}"
finally:
self.release_cuda_memory()
self.remove_input_files([micaudio])
def transcribe(self,
audio: Union[str, BinaryIO, np.ndarray],
lang: str,
istranslate: bool,
progress: gr.Progress
) -> Tuple[list, float]:
"""
transcribe method for faster-whisper.
Parameters
----------
audio: Union[str, BinaryIO, np.ndarray]
Audio path or file binary or Audio numpy array
lang: str
Source language of the file to transcribe from gr.Dropdown()
istranslate: bool
Boolean value from gr.Checkbox() that determines whether to translate to English.
It's Whisper's feature to translate speech from another language directly into English end-to-end.
progress: gr.Progress
Indicator to show progress directly in gradio.
Returns
----------
segments_result: list[dict]
list of dicts that includes start, end timestamps and transcribed text
elapsed_time: float
elapsed time for transcription
"""
start_time = time.time()
segments, info = self.model.transcribe(
audio=audio,
language=lang,
beam_size=self.default_beam_size,
task="translate" if istranslate and self.current_model_size in self.translatable_models else "transcribe"
)
progress(0, desc="Loading audio..")
total_frames = self.get_total_frames(audio=audio, progress=progress)
segments_result = []
for segment in segments:
progress(segment.seek / total_frames, desc="Transcribing..")
segments_result.append({
"start": segment.start,
"end": segment.end,
"text": segment.text
})
elapsed_time = time.time() - start_time
return segments_result, elapsed_time
def initialize_model(self,
model_size: str,
progress: gr.Progress
):
"""
Initialize model if it doesn't match with current model size
"""
progress(0, desc="Initializing Model..")
self.current_model_size = model_size
self.model = faster_whisper.WhisperModel(
device=self.device,
model_size_or_path=model_size,
download_root=os.path.join("models", "Whisper", "faster-whisper"),
compute_type="float16"
)
def get_total_frames(self,
audio: Union[str, BinaryIO],
progress: gr.Progress
) -> float:
"""
This method is only for tracking the progress.
Returns total frames to track progress.
"""
progress(0, desc="Loading audio..")
decoded_audio = faster_whisper.decode_audio(audio)
features = self.model.feature_extractor(decoded_audio)
content_frames = features.shape[-1] - self.model.feature_extractor.nb_max_frames
return content_frames
@staticmethod
def generate_and_write_subtitle(file_name: str,
transcribed_segments: list,
add_timestamp: bool,
subformat: str,
) -> str:
"""
This method writes subtitle file and returns str to gr.Textbox
"""
timestamp = datetime.now().strftime("%m%d%H%M%S")
if add_timestamp:
output_path = os.path.join("outputs", f"{file_name}-{timestamp}")
else:
output_path = os.path.join("outputs", f"{file_name}")
if subformat == "SRT":
subtitle = get_srt(transcribed_segments)
write_file(subtitle, f"{output_path}.srt")
elif subformat == "WebVTT":
subtitle = get_vtt(transcribed_segments)
write_file(subtitle, f"{output_path}.vtt")
return subtitle
@staticmethod
def format_time(elapsed_time: float) -> str:
hours, rem = divmod(elapsed_time, 3600)
minutes, seconds = divmod(rem, 60)
time_str = ""
if hours:
time_str += f"{hours} hours "
if minutes:
time_str += f"{minutes} minutes "
seconds = round(seconds)
time_str += f"{seconds} seconds"
return time_str.strip()
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