Struct LoudnessMeter 

pub struct LoudnessMeter { /* private fields */ }

Measures EBU R128 integrated loudness, loudness range, and true peak.

Uses FFmpeg’s ebur128=metadata=1:peak=true filter graph internally. The analysis is self-contained — no external decoder is required.

Examples

use ff_filter::LoudnessMeter;

let result = LoudnessMeter::new("audio.mp3").measure()?;
println!("Integrated: {:.1} LUFS", result.integrated_lufs);
println!("LRA: {:.1} LU", result.lra);
println!("True peak: {:.1} dBTP", result.true_peak_dbtp);

Implementations

impl LoudnessMeter

pub fn new(input: impl AsRef<Path>) -> Self

Creates a new meter for the given audio or video file.

pub fn measure(self) -> Result<LoudnessResult, FilterError>

Runs EBU R128 loudness analysis and returns the result.

Errors

• FilterError::AnalysisFailed — input file not found, unsupported format, or the filter graph could not be constructed.