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import io
import sys
from typing import BinaryIO
from markitdown._exceptions import MissingDependencyException
# Try loading optional (but in this case, required) dependencies
# Save reporting of any exceptions for later
_dependency_exc_info = None
try:
# Suppress some warnings on library import
import warnings
with warnings.catch_warnings():
warnings.filterwarnings("ignore", category=DeprecationWarning)
warnings.filterwarnings("ignore", category=SyntaxWarning)
import speech_recognition as sr
import pydub
except ImportError:
# Preserve the error and stack trace for later
_dependency_exc_info = sys.exc_info()
def transcribe_audio(file_stream: BinaryIO, *, audio_format: str = "wav", language: str = None) -> str:
# Check for installed dependencies
if _dependency_exc_info is not None:
raise MissingDependencyException(
"Speech transcription requires installing MarkItdown with the [audio-transcription] optional dependencies. E.g., `pip install markitdown[audio-transcription]` or `pip install markitdown[all]`"
) from _dependency_exc_info[
1
].with_traceback( # type: ignore[union-attr]
_dependency_exc_info[2]
)
if audio_format in ["wav", "aiff", "flac"]:
audio_source = file_stream
elif audio_format in ["mp3", "mp4", "webm"]:
audio_segment = pydub.AudioSegment.from_file(file_stream, format=audio_format)
audio_source = io.BytesIO()
audio_segment.export(audio_source, format="wav")
audio_source.seek(0)
else:
raise ValueError(f"Unsupported audio format: {audio_format}")
recognizer = sr.Recognizer()
with sr.AudioFile(audio_source) as source:
audio = recognizer.record(source)
if language is None:
language = "en-US"
try:
transcript = recognizer.recognize_faster_whisper(audio, language=language.split("-")[0]).strip()
except ImportError:
transcript = recognizer.recognize_google(audio, language=language).strip()
return "[No speech detected]" if transcript == "" else transcript.strip()
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