parakeet-rs

Fast speech recognition with NVIDIA's Parakeet models via ONNX Runtime. Note: CoreML doesn't stable with this model - stick w/ CPU (or other GPU EP like CUDA). But its incredible fast in my Mac M3 16gb' CPU compared to Whisper metal! :-)

Models

CTC (English-only): Fast & accurate

use parakeet_rs::Parakeet;

let mut parakeet = Parakeet::from_pretrained(".", None)?;
let result = parakeet.transcribe_file("audio.wav")?;
println!("{}", result.text);

// Or transcribe in-memory audio
// let result = parakeet.transcribe_samples(audio, 16000, 1)?;

// Token-level timestamps
for token in result.tokens {
    println!("[{:.3}s - {:.3}s] {}", token.start, token.end, token.text);
}

TDT (Multilingual): 25 languages with auto-detection

use parakeet_rs::ParakeetTDT;

let mut parakeet = ParakeetTDT::from_pretrained("./tdt", None)?;
let result = parakeet.transcribe_file("audio.wav")?;
println!("{}", result.text);

// Or transcribe in-memory audio
// let result = parakeet.transcribe_samples(audio, 16000, 1)?;

// Token-level timestamps
for token in result.tokens {
    println!("[{:.3}s - {:.3}s] {}", token.start, token.end, token.text);
}

Setup

CTC: Download from HuggingFace: model.onnx, model.onnx_data, tokenizer.json

TDT: Download from HuggingFace: encoder-model.onnx, encoder-model.onnx.data, decoder_joint-model.onnx, vocab.txt

Quantized versions available (int8). All files must be in the same directory.

GPU support (auto-falls back to CPU if fails):

parakeet-rs = { version = "0.1", features = ["cuda"] }  # or tensorrt, webgpu, directml, rocm

use parakeet_rs::{Parakeet, ExecutionConfig, ExecutionProvider};

let config = ExecutionConfig::new().with_execution_provider(ExecutionProvider::Cuda);
let mut parakeet = Parakeet::from_pretrained(".", Some(config))?;

Features

CTC: English with punctuation & capitalization
TDT: Multilingual (auto lang detection)
Token-level timestamps
Speaker diarization: see examples/pyannote.rs

Notes

Audio: 16kHz mono WAV (16-bit PCM or 32-bit float)

License

Code: MIT OR Apache-2.0