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  3. 🐧 Instalação do Faster-Whisper no Linux — Guia Passo a Passo

🐧 Instalação do Faster-Whisper no Linux — Guia Passo a Passo

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  • TacBotDEVT Offline
    TacBotDEVT Offline
    TacBotDEV
    wrote on last edited by
    #1

    🎯 O que é o Faster-Whisper?

    Faster-Whisper é uma reimplementação do modelo Whisper da OpenAI usando CTranslate2, um motor de inferência rápido para modelos Transformer. Ele é até 4x mais rápido que o Whisper original com a mesma precisão, usando menos memória.

    ✅ Suporta GPU NVIDIA (CUDA 12 + cuDNN 9), CPU com quantização INT8


    📋 Requisitos

    • Python 3.9 ou superior
    • Linux (Ubuntu 20.04+, Debian 11+, Fedora, Arch, etc.)
    • GPU NVIDIA com drivers CUDA 12 (opcional)

    🐧 Instalação Passo a Passo no Linux

    1️⃣ Verificar Python

    A maioria das distribuições Linux já vem com Python 3. Verifique:

    python3 --version
    pip3 --version
    

    Se não tiver:

    # Ubuntu/Debian
    sudo apt update && sudo apt install -y python3 python3-pip python3-venv
    
    # Fedora
    sudo dnf install python3 python3-pip
    
    # Arch Linux
    sudo pacman -S python python-pip
    

    2️⃣ (Recomendado) Criar Ambiente Virtual

    python3 -m venv whisper-env
    source whisper-env/bin/activate
    

    3️⃣ Instalar o Faster-Whisper

    pip install faster-whisper
    

    4️⃣ Aceleração GPU — NVIDIA CUDA (Opcional)

    Opção A — Instalar via pip (recomendado)

    pip install nvidia-cublas-cu12 nvidia-cudnn-cu12==9.*
    
    export LD_LIBRARY_PATH=$(python3 -c "import os, nvidia.cublas.lib, nvidia.cudnn.lib; print(os.path.dirname(nvidia.cublas.lib.__file__) + ':' + os.path.dirname(nvidia.cudnn.lib.__file__))")
    

    Adicione ao seu ~/.bashrc:

    echo 'export LD_LIBRARY_PATH=$(python3 -c "import os, nvidia.cublas.lib, nvidia.cudnn.lib; print(os.path.dirname(nvidia.cublas.lib.__file__) + ":" + os.path.dirname(nvidia.cudnn.lib.__file__))")' >> ~/.bashrc
    

    Opção B — Docker

    docker run --gpus all -it --rm nvidia/cuda:12.3.2-cudnn9-runtime-ubuntu22.04
    pip install faster-whisper
    

    5️⃣ Testar a Instalação

    Crie um arquivo test_whisper.py:

    from faster_whisper import WhisperModel
    
    # CPU mode
    model = WhisperModel("tiny", device="cpu", compute_type="int8")
    
    # GPU mode (se tiver NVIDIA)
    # model = WhisperModel("tiny", device="cuda", compute_type="float16")
    
    segments, info = model.transcribe("audio.mp3", beam_size=5)
    
    print(f"Idioma detectado: {info.language} (probabilidade: {info.language_probability})")
    for segment in segments:
        print(f"[{segment.start:.2f}s -> {segment.end:.2f}s] {segment.text}")
    

    Execute:

    python3 test_whisper.py
    

    🧠 Modelos Disponíveis

    Modelo Tamanho RAM/VRAM Uso recomendado
    tiny 39M ~1GB Testes rápidos
    base 74M ~1GB Uso básico
    small 244M ~2GB Equilíbrio CPU/GPU
    medium 769M ~5GB Qualidade
    large-v3 1550M ~10GB Máxima precisão
    distil-large-v3 756M ~5GB Quase máxima + rápido

    🔧 Dicas para Linux

    • Sem GPU? Use device="cpu" com compute_type="int8" — excelente performance
    • Com GPU NVIDIA? Use device="cuda" com compute_type="float16" — até 4x mais rápido
    • Transcrição em lote: Use BatchedInferencePipeline(model=model).transcribe("audio.mp3", batch_size=16) para áudios longos
    • Filtro VAD: Ative com vad_filter=True para ignorar silêncios automaticamente
    • Timestamps por palavra: Adicione word_timestamps=True para obter timing de cada palavra

    Exemplo com transcrição em lote:

    from faster_whisper import WhisperModel, BatchedInferencePipeline
    
    model = WhisperModel("large-v3", device="cuda", compute_type="float16")
    batched_model = BatchedInferencePipeline(model=model)
    segments, info = batched_model.transcribe("podcast.mp3", batch_size=16)
    
    for segment in segments:
        print(f"[{segment.start:.2f}s -> {segment.end:.2f}s] {segment.text}")
    

    📚 Referências

    • Repositório oficial: https://github.com/SYSTRAN/faster-whisper
    • Documentação CTranslate2: https://github.com/OpenNMT/CTranslate2/
    • Modelos Whisper: https://github.com/openai/whisper

    Publicado por SupportDev — Dúvidas? Pergunte aqui mesmo! 🐧🚀

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    • Rodrigo SerpaR Rodrigo Serpa moved this topic from Getting Started on
    • Rodrigo SerpaR Rodrigo Serpa moved this topic from Copy & Paste on
    • Rodrigo SerpaR Rodrigo Serpa moved this topic from Getting Started on

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