node-hls-tools/bin/hlsmon

#!/usr/bin/env node

"use strict";

var hlsmon = require('commander');
hlsmon.version('0.0.0')
   .usage('[options] <url>')
   .option('-a', '--user-agent <string>', 'User-Agent')
   .parse(process.argv);

var url = require('url');

var HlsSegmentReader = require('hls-segment-reader');

var src = process.argv[2];
var sep = ';';

function monitor(srcUrl) {
  var r = new HlsSegmentReader(srcUrl);

  var time = 0;
  r.on('readable', function() {
    var obj;
    while (null !== (obj = r.read())) {
      var meta = obj.meta;
      var duration = obj.segment.duration;
      console.log(meta.modified.toJSON() + sep + meta.size + sep + duration.toFixed(3) + sep + (meta.size / (duration * 1024 / 8)).toFixed(3));
      time += duration;
    }
  });

  r.once('index', function() {
    // wait until first index is returned before attaching error listener.
    // this will enable initials errors to throw
    r.on('error', function(err) {
      console.error('reader error', err.stack || err);
    });
  });

  r.on('end', function() {
    if (r.index && r.index.variant) {
      var newUrl = url.resolve(r.baseUrl, r.index.programs['1'][0].uri);
      console.error('found variant index, using: ', newUrl);
      return monitor(newUrl);
    }
    console.error('done');
  });

  r.resume();
}

monitor(src);