nodejs pts packet sequence analysis using ffprobe

pts_analysis.js

const { execSync } = require('child_process');
const stdout = execSync(`ffprobe -of json -show_packets -show_streams -show_format -i ${process.argv[2]}`, { maxBuffer: 1024 * 1024 * 32 });
const { packets } = JSON.parse(stdout);
for (let i = 0; i < packets.length - 1; i++) {
    const pts = Number(packets[i].pts);
    const duration = Number(packets[i].duration);
    const pts_next = Number(packets[i + 1]?.pts);
    if (pts + duration !== pts_next) {
        console.log(`timestamp issue on packet index: ${i + 1}, pts is expected to be ${pts + duration} but it is ${pts_next}`);
    }
}