//command: wget -q -O- "http://URL" | ffprobe pipe:0
var childProcess = require('child_process');
var outpout = 'FILPATH';

var url = "http://file.avi";

var downloadWget = childProcess.spawn('wget', ["-q", '-O-', url], {cwd: outpout});
var ffprobleChild = childProcess.spawn('ffprobe', ['pipe:0'/*,'-show_format', '2>&1', '|', "sed", '-n', "'s/duration=//p'"*/], {cwd: outpout});

downloadWget.stdout.pipe(ffprobleChild.stdin);

ffprobleChild.stderr.on('data', function(data) {
    console.log(data.toString());
});


//error: