Whisper ASR Webservice

Whisper is a general-purpose speech recognition model. It is trained on a large dataset of diverse audio and is also a multi-task model that can perform multilingual speech recognition as well as speech translation and language identification. For more details: github.com/openai/whisper

Run (Docker Hub)

Whisper ASR Webservice now available on Docker Hub. You can find the latest version of this repository on docker hub for CPU and GPU.

Docker Hub: https://hub.docker.com/r/onerahmet/openai-whisper-asr-webservice

For CPU:

docker run -d -p 9000:9000 -e ASR_MODEL=base onerahmet/openai-whisper-asr-webservice:latest

For GPU:

docker run -d --gpus all -p 9000:9000 -e ASR_MODEL=base onerahmet/openai-whisper-asr-webservice:latest-gpu

# Interactive Swagger API documentation is available at http://localhost:9000/docs

Available ASR_MODELs are tiny, base, small, medium and large

For English-only applications, the .en models tend to perform better, especially for the tiny.en and base.en models. We observed that the difference becomes less significant for the small.en and medium.en models.

Run (Development Environment)

Install poetry with following command:

pip3 install poetry==1.2.2

Install torch with following command:

# for cpu:
pip3 install torch==1.13.0+cpu -f https://download.pytorch.org/whl/torch
# for gpu:
pip3 install torch==1.13.0+cu117 -f https://download.pytorch.org/whl/torch

Install packages:

poetry install

Starting the Webservice:

gunicorn --bind 0.0.0.0:9000 --workers 1 --timeout 0 whisper_asr.webservice:app -k uvicorn.workers.UvicornWorker

Quick start

After running the docker image or poetry run whisper_asr interactive Swagger API documentation is available at localhost:9000/docs

There are 2 endpoints available:

• /asr (JSON, SRT, VTT)
• /detect-language

Automatic Speech recognition service /asr

If you choose the transcribe task, transcribes the uploaded file. Both audio and video files are supported (as long as ffmpeg supports it).

Note that you can also upload video formats directly as long as they are supported by ffmpeg.

You can get SRT and VTT output as a file from /asr endpoint.

You can provide the language or it will be automatically recognized.

If you choose the translate task it will provide an English transcript no matter which language was spoken.

Returns a json with following fields:

• text: Contains the full transcript
• segments: Contains an entry per segment. Each entry provides time stamps, transcript, token ids and other metadata
• language: Detected or provided language (as a language code)

Language detection service /detect-language

Detects the language spoken in the uploaded file. For longer files it only processes first 30 seconds.

Returns a json with following fields:

• detected_language
• langauge_code

Build

Build .whl package

poetry build

Configuring the Model

export ASR_MODEL=base

Docker Build

For CPU

# Build Image
docker build -t whisper-asr-webservice .

# Run Container
docker run -d -p 9000:9000 whisper-asr-webservice
# or
docker run -d -p 9000:9000 -e ASR_MODEL=base whisper-asr-webservice

For GPU

# Build Image
docker build -f Dockerfile.gpu -t whisper-asr-webservice-gpu .

# Run Container
docker run -d --gpus all -p 9000:9000 whisper-asr-webservice-gpu
# or
docker run -d --gpus all -p 9000:9000 -e ASR_MODEL=base whisper-asr-webservice-gpu

TODO

• Unit tests
• Recognize from path
• Batch recognition from given path/folder
• Live recognition support with HLS
• gRPC support