mpeg-ps 0.4.0

MPEG-1/2 Program Stream parser — pack header, system header, program stream map (ISO/IEC 13818-1 §2.5).
Documentation 
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/// Walk the real `.mpg` fixture at runtime, report pack count + SCR timeline.
///
/// ```sh
/// cargo run -p mpeg-ps --example walk_ps
/// ```
use std::fs;

use mpeg_ps::program_stream;

fn main() {
    // Fixtures live in the workspace-shared `fixtures/` tree, not under the
    // crate. A committed fixture that cannot be read is a bug, not a reason
    // to skip — so a missing/unreadable fixture is a hard failure.
    let path = concat!(
        env!("CARGO_MANIFEST_DIR"),
        "/../fixtures/mpeg-ps/ffmpeg-mpeg2-ps.mpg"
    );
    let data = fs::read(path)
        .unwrap_or_else(|e| panic!("committed fixture {path} could not be read: {e}"));
    let (packs, trailing) = program_stream::parse_all_packs(&data).unwrap();

    println!("File: {path}");
    println!("Size: {} bytes", data.len());
    println!("Trailing bytes: {}", trailing.len());
    println!("Packs: {}", packs.len());
    println!();
    println!(
        "{:<6} {:<20} {:<15} {:<10}",
        "Pack", "SCR (ticks)", "SCR (s)", "mux_rate (B/s)"
    );
    println!("{:-<6} {:-<20} {:-<15} {:-<10}", "", "", "", "");

    let mut pes_total = 0usize;
    for (i, pack) in packs.iter().enumerate() {
        let scr_ticks = pack.pack_header.scr.ticks();
        let scr_s = pack.pack_header.scr.seconds();
        let mux_rate = pack.pack_header.program_mux_rate * 50;
        println!("{i:<6} {scr_ticks:<20} {scr_s:<15.6} {mux_rate:<10}",);

        if let Some(ref sh) = pack.system_header {
            println!(
                "       system_header: rate_bound={}, audio_bound={}, video_bound={}, streams={}",
                sh.rate_bound,
                sh.audio_bound,
                sh.video_bound,
                sh.std_buffer_bounds.len(),
            );
        }

        for pes in &pack.pes_packets {
            pes_total += 1;
            if let Some(ref hdr) = pes.header
                && let Some(pts) = hdr.pts
            {
                let pts_s = pts.seconds();
                println!(
                    "         PES stream_id={:#04x} PTS={:.6}s payload={}B",
                    pes.stream_id.0,
                    pts_s,
                    pes.payload.len(),
                );
            }
        }
    }

    println!();
    println!("Total PES packets: {pes_total}");
}