87 lines
3.3 KiB
Rust
87 lines
3.3 KiB
Rust
// This example is not going to build in this folder.
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// You need to copy this code into your project and add the whisper_rs dependency in your cargo.toml
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use std::fs::File;
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use std::io::Write;
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use whisper_rs::{FullParams, SamplingStrategy, WhisperContext};
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/// Loads a context and model, processes an audio file, and prints the resulting transcript to stdout.
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fn main() {
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// Load a context and model.
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let mut ctx = WhisperContext::new("example/path/to/model/whisper.cpp/models/ggml-base.en.bin")
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.expect("failed to load model");
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// Create a params object for running the model.
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// Currently, only the Greedy sampling strategy is implemented, with BeamSearch as a WIP.
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// The number of past samples to consider defaults to 0.
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let mut params = FullParams::new(SamplingStrategy::Greedy { n_past: 0 });
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// Edit params as needed.
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// Set the number of threads to use to 1.
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params.set_n_threads(1);
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// Enable translation.
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params.set_translate(true);
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// Set the language to translate to to English.
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params.set_language("en");
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// Disable anything that prints to stdout.
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params.set_print_special(false);
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params.set_print_progress(false);
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params.set_print_realtime(false);
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params.set_print_timestamps(false);
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// Open the audio file.
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let mut reader = hound::WavReader::open("audio.wav").expect("failed to open file");
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let hound::WavSpec {
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channels,
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sample_rate,
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bits_per_sample,
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..
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} = reader.spec();
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// Convert the audio to floating point samples.
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let mut audio = whisper_rs::convert_integer_to_float_audio(
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&reader
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.samples::<i16>()
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.map(|s| s.expect("invalid sample"))
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.collect::<Vec<_>>(),
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);
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// Convert audio to 16KHz mono f32 samples, as required by the model.
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// These utilities are provided for convenience, but can be replaced with custom conversion logic.
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// SIMD variants of these functions are also available on nightly Rust (see the docs).
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if channels == 2 {
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audio = whisper_rs::convert_stereo_to_mono_audio(&audio);
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} else if channels != 1 {
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panic!(">2 channels unsupported");
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}
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if sample_rate != 16000 {
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panic!("sample rate must be 16KHz");
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}
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// Run the model.
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ctx.full(params, &audio[..]).expect("failed to run model");
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// Create a file to write the transcript to.
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let mut file = File::create("transcript.txt").expect("failed to create file");
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// Iterate through the segments of the transcript.
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let num_segments = ctx.full_n_segments();
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for i in 0..num_segments {
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// Get the transcribed text and timestamps for the current segment.
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let segment = ctx.full_get_segment_text(i).expect("failed to get segment");
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let start_timestamp = ctx.full_get_segment_t0(i);
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let end_timestamp = ctx.full_get_segment_t1(i);
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// Print the segment to stdout.
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println!("[{} - {}]: {}", start_timestamp, end_timestamp, segment);
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// Format the segment information as a string.
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let line = format!("[{} - {}]: {}\n", start_timestamp, end_timestamp, segment);
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// Write the segment information to the file.
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file.write_all(line.as_bytes())
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.expect("failed to write to file");
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}
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}
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