fs = require('fs');
var ffmpeg = require('ffmpeg-static');
const os = require('os');
console.log(ffmpeg.path);
const { spawn } = require('child_process');
const Writable = require('stream').Writable;

const fpath = __dirname + "/uno.mp4"
const resultpath = __dirname + "/out.png"
const arguments = `-i pipe: -ss 00:00:02 -vframes 1 ${resultpath}`
const child = spawn(ffmpeg.path, arguments.split(' '), {
    cwd: os.tmpdir(),
});

child.stdin.on('error', (...arg) => {
    console.log('error', arg);
});

child.on('exit', code => {
    console.log('exit', code);
});

child.stdout.on('data', (data) => {
    console.log(`stdout: ${data}`);
});

child.stderr.on('data', (data) => {
    console.log(`stderr: ${data}`);
});


const readable = fs.createReadStream(__dirname + '/uno.mp4');
readable.on('data', (chunk) => {
    console.log(`Received ${chunk.length} bytes of data.`);
    child.stdin.write(chunk);
});
readable.on('end', () => {
    console.log('There will be no more data.');
    child.stdin.end()
});

// readable.pipe(child.stdin);