MKV/WebM Format

[dependencies]
symphonia = { version = "0.5", features = ["mkv"] }

use symphonia::core::formats::FormatOptions;
use symphonia::core::io::MediaSourceStream;
use symphonia::core::meta::MetadataOptions;
use symphonia::core::probe::Hint;
use std::fs::File;

fn main() -> Result<(), Box<dyn std::error::Error>> {
    // Open the MKV/WebM file
    let file = Box::new(File::open("audio.webm")?);
    let mss = MediaSourceStream::new(file, Default::default());

    // Create a hint
    let mut hint = Hint::new();
    hint.with_extension("webm");

    // Probe the media source
    let format_opts = FormatOptions::default();
    let metadata_opts = MetadataOptions::default();
    
    let probed = symphonia::default::get_probe()
        .format(&hint, mss, &format_opts, &metadata_opts)?;

    let mut format = probed.format;

    // MKV files can have multiple audio tracks
    for track in format.tracks() {
        if track.codec_params.codec != symphonia::core::codecs::CODEC_TYPE_NULL {
            println!("Track {}: {:?}", track.id, track.codec_params.codec);
            println!("  Sample Rate: {:?}", track.codec_params.sample_rate);
            println!("  Channels: {:?}", track.codec_params.channels);
            if let Some(lang) = &track.language {
                println!("  Language: {}", lang);
            }
        }
    }

    // Read metadata and tags
    if let Some(metadata) = probed.metadata.get() {
        for tag in metadata.tags() {
            println!("{}: {}", tag.key, tag.value);
        }
    }

    // Get cue points (chapters)
    for cue in format.cues() {
        println!("Cue at {}: {:?}", cue.index, cue.tags);
    }

    Ok(())
}

let audio_tracks: Vec<_> = format.tracks()
    .iter()
    .filter(|t| matches!(t.codec_params.codec, 
        symphonia::core::codecs::CODEC_TYPE_NULL))
    .collect();