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View Code? Open in Web Editor NEWAssets for Twitch's ACM MMSys 2020 Grand Challenge
License: Apache License 2.0
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todokku makcay godka soonyangzhang haitian2du longo11070001 davidfdzp thalka racheal1064 xinj3 sichen-cuc abha-m classicvalues jmsn venkyr77 vnd168 mark-su-0204 mark728se chburdinatacm-mmsys-2020-grand-challenge's Issues
Version For Node and Grunt
Hi,
While setting up the project and when i run grunt dev, i get this error.
sam@mac dash.js % grunt dev
Loading "jscs.js" tasks...ERROR
>> ReferenceError: primordials is not defined
Running "browserSync:bsFiles" (browserSync) task
[HTML Injector] Running...
[Browsersync] Access URLs:
Local: http://localhost:3000/samples/index.html
External: http://192.168.0.103:3000/samples/index.html
UI: http://localhost:3001
UI External: http://localhost:3001
[Browsersync] Serving files from: ./
[Browsersync] Watching files...
Running "browserify:watch_dev" (browserify) task
/Users/sam/mmsys/acm-mmsys-2020-grand-challenge-master/dash.js/index.js:31
import { MediaPlayer } from './index_mediaplayerOnly';
^
ParseError: 'import' and 'export' may appear only with 'sourceType: module'
Warning: Error running grunt-browserify. Use --force to continue.
Aborted due to warnings.
Execution Time (2021-09-29 21:04:18 UTC-4)
loading tasks 1.5s ▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇ 57%
browserSync:bsFiles 552ms ▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇ 21%
browserify:watch_dev 584ms ▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇ 22%
Total 2.6s
What could be the reason for this error? is it a version mismatch between node and grunt.
I use node version 14.15.1 , grunt version 1.4.1 and grunt-cli version 1.4.3
Loading own ABR rule
Hello. I am trying to import my custom ABR rule in 'index.html', in order to direct the player to use my 'CustomRule' instead of the Default ABR settings ('useDefaultABRRules': false).
Although all include directories seem to be set correctly, I get the following error:
Uncaught ReferenceError: CustomRule is not defined.
Via a search online, I have found that this is typically related to jQuery not being referenced (which in my case it is). Has anyone experienced a similar problem, or has any suggestions on how to resolve it?
Here is my index.html:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8"/>
<title>Low latency live stream instantiation example</title>
<script src="../../dist/dash.all.debug.js"></script>
<script src="http://code.jquery.com/jquery-3.4.1.min.js"></script>
<script type='module' src="./CustomRule.js"></script>
<!--dash.all.min.js should be used in production over dash.all.debug.js
Debug files are not compressed or obfuscated making the file size much larger compared with dash.all.min.js-->
<!--<script src="../../dist/dash.all.min.js"></script>-->
<script class="code">
var player, targetLatency, minDrift, catchupPlaybackRate;
function init() {
var video,
url = 'http://localhost:9001/live/live.mpd';
video = document.querySelector("video");
player = dashjs.MediaPlayer().create();
player.initialize(video, url, true);
player.updateSettings({ 'streaming': { 'lowLatencyEnabled': true }});
player.updateSettings({'debug': {'logLevel': dashjs.Debug.LOG_LEVEL_WARNING }});
player.updateSettings({
'streaming': {
'abr': {
'useDefaultABRRules': false //in case of own abr algo development
}
}
});
// add my custom quality switch rule.
player.addABRCustomRule('qualitySwitchRules', 'CustomRule', CustomRule);
applyParameters();
return player;
}
function applyParameters() {
targetLatency = parseFloat(document.getElementById("target-latency").value, 10);
minDrift = parseFloat(document.getElementById("min-drift").value, 10);
catchupPlaybackRate = parseFloat(document.getElementById("catchup-playback-rate").value, 10);
player.updateSettings({
'streaming': {
'liveDelay': targetLatency,
'liveCatchUpMinDrift': minDrift,
'liveCatchUpPlaybackRate': catchupPlaybackRate
}
});
}
</script>
<style>
.video-wrapper {
display: flex;
flex-flow: row wrap;
}
.video-wrapper > div:nth-child(2) {
margin-left: 25px;
}
video {
width: 640px;
height: 360px;
}
ul {
margin: 0;
}
input {
width: 5em;
border: 1px solid gray;
padding: 0 4px 0 8px;
}
.help-container {
display: flex;
flex-flow: row wrap;
margin-top: 1em;
align-content: center;
background: white;
border: solid 1px #ddd;
padding: 0.5em;
}
.help-container > div {
width: 33.3%;
padding: 1em;
box-sizing: border-box;
}
.help-container h3 {
margin-top: 0;
}
</style>
</head>
<body>
<div>
<div class="video-wrapper">
<video controls="true" autoplay muted></video>
<div>
<div>
<form action="javascript:applyParameters()">
<fieldset>
<legend>Configurable parameters</legend>
<p>Target Latency (secs): <input type="number" id="target-latency" value="1" min="0" step="0.1"></p>
<p>Min. drift (secs): <input type="number" id="min-drift" value="0.05" min="0.0" max="0.5" step="0.01"></p>
<p>Catch-up playback rate (%): <input type="number" id="catchup-playback-rate" value="0.5" min="0.0" max="0.5" step="0.01"></p>
<button type="submit">Apply</button>
</fieldset>
</form>
</div>
<br>
<fieldset>
<legend>Current values</legend>
<ul>
<li>Latency: <span id="latency-tag"></span></li>
<li>Min. drift: <span id="mindrift-tag"></span></li>
<li>Playback rate: <span id="playbackrate-tag"></span></li>
<li>Buffer: <b><span id="buffer-tag"></span></b></li>
<li>Quality: <b><span id="quality-tag"></span></b></li>
</ul>
<div id="stats"></div>
</fieldset>
</div>
</div>
<p style="font-family:Arial,sans-serif; font-weight: bold; font-size: 1.1em">Concepts definition</p>
<div class="help-container">
<div id="latency-help">
<h3>Latency</h3>
<p>Lowering this value will lower latency but may decrease the player's ability to build a stable buffer.</p>
<p><a href="http://cdn.dashjs.org/latest/jsdoc/module-MediaPlayer.html#setLiveDelay__anchor" target="_blank">setLiveDelay() doc</a></p>
</div>
<div id="min-drift-help">
<h3>Min. drift</h3>
<p>Minimum latency deviation allowed before activating catch-up mechanism.</p>
<p><a href="http://cdn.dashjs.org/latest/jsdoc/module-MediaPlayer.html#setLowLatencyMinDrift__anchor" target="_blank">setLowLatencyMinDrift() doc</a></p>
</div>
<div id="catch-up-playback-rate-help">
<h3>Catch-up playback rate</h3>
<p>Maximum catch-up rate, as a percentage, for low latency live streams.</p>
<p><a href="http://cdn.dashjs.org/latest/jsdoc/module-MediaPlayer.html#setCatchUpPlaybackRate__anchor" target="_blank">setCatchUpPlaybackRate() doc</a></p>
</div>
</div>
</div>
<script>
document.addEventListener("DOMContentLoaded", function () {
const player = init();
const video = document.querySelector("video")
let stallingAt = null;
const CMA = () => {
let average = 0;
let count = 0;
return {
average(val) {
if (isNaN(val)) {
return 0;
}
average = average + ((val - average) / ++count);
return average;
},
}
}
setInterval(function() {
var dashMetrics = player.getDashMetrics();
var settings = player.getSettings();
var currentLatency = parseFloat(player.getCurrentLiveLatency(), 10);
document.getElementById("latency-tag").innerHTML = currentLatency + " secs";
document.getElementById("mindrift-tag").innerHTML = settings.streaming.liveCatchUpMinDrift + " secs";
var currentPlaybackRate = player.getPlaybackRate();
document.getElementById("playbackrate-tag").innerHTML = Math.round(currentPlaybackRate * 100) / 100;
var currentBuffer = dashMetrics.getCurrentBufferLevel("video");
document.getElementById("buffer-tag").innerHTML = currentBuffer + " secs";
}, 200);
player.on(dashjs.MediaPlayer.events.QUALITY_CHANGE_REQUESTED, (e) => {
console.warn('Quality changed requested', e);
});
player.on(dashjs.MediaPlayer.events.QUALITY_CHANGE_RENDERED, (e) => {
console.warn('Quality changed', e);
const quality = player.getBitrateInfoListFor('video')[e.newQuality];
if (!quality) {
return;
}
document.querySelector('#quality-tag').innerText = `${quality.width}x${quality.height}, ${quality.bitrate / 1000}Kbps`;
});
window.startRecording = () => {
console.info('Begin recording');
const latencyCMA = CMA();
const bufferCMA = CMA();
const history = window.abrHistory = {
switchHistory: [],
stallDuration: 0,
averageLatency: 0,
averageBufferLength: 0,
};
// Record the initial quality
recordSwitch(player.getBitrateInfoListFor('video')[player.getQualityFor('video')]);
let pollInterval = -1;
window.stopRecording = () => {
clearInterval(pollInterval);
checkStallResolution();
const lastQuality = history.switchHistory[history.switchHistory.length - 1];
if (lastQuality.end === null) {
lastQuality.end = video.currentTime;
}
console.warn('Run ended. Please navigate back to node for results.');
}
pollInterval = setInterval(function() {
const currentLatency = parseFloat(player.getCurrentLiveLatency(), 10);
const currentBuffer = player.getDashMetrics().getCurrentBufferLevel("video");
history.averageLatency = latencyCMA.average(currentLatency);
history.averageBufferLength = bufferCMA.average(currentBuffer);
console.log(history);
}, 200);
player.on(dashjs.MediaPlayer.events.QUALITY_CHANGE_RENDERED, (e) => {
recordSwitch(player.getBitrateInfoListFor('video')[e.newQuality]);
});
video.addEventListener('waiting', (e) => {
stallingAt = performance.now();
});
video.addEventListener('timeupdate', () => {
checkStallResolution();
});
function recordSwitch(quality) {
if (!quality) {
return;
}
const switchHistory = history.switchHistory;
const prev = switchHistory[switchHistory.length - 1];
const videoNow = video.currentTime;
if (prev) {
prev.end = videoNow;
}
switchHistory.push({ start: videoNow, end: null, quality });
}
function checkStallResolution() {
if (stallingAt !== null) {
history.stallDuration += (performance.now() - stallingAt);
stallingAt = null;
}
}
}
});
</script>
<script src="../highlighter.js"></script>
</body>
</html>
Start denied to Schedule Controller
I'm facing nearly all the time this error:
[415][ScheduleController][video] Start denied to Schedule Controller
Sometimes streaming works. Any ideas?
Platform:
- Manjaro
- Own FFmpeg build
A question about the bitrate ladder
As shown, does it mean that the video is encoded with the same bitrates but different resolutions?
Thx.
Network patterns for training solutions
I succeeded in setting up the test-bed and am working on my algorithm.
It would be helpful if you can provide me some network patterns for training my algorithm.
The current network patterns are quite simple and even some simple algorithms can perform very well already.
Thank you very much for your cooperation,
mpd not available on dash.js
Hi, I am using windows, according to the description, I compiled ffmpeg from scratch in the listed link, and installed dash.js. after running run_server.sh and run_gen.sh, I couldn't access the mpd file from dash.if player on the browser. Is there some issue with windows OS? or I should just switch to a linux system.
Using latest version of dash.js
Hi, @johnBartos , thank you for setting up an environment to study the low latency streaming.
Can I just replace the dash.js directory in this repo with the latest version to test the new functions of low latency dash? As you know, dash v3.2 has adoptted some great solutions of this challenge, and we want to test them with certain networks. You mentioned that the dash.js in this repo is modified, so I wound like to know is it okay to simply replace the dash.js directory, or some coordination is needed to incorporate the latest dash.js with the rest of this repo?
Thank you for your attention.
Lacking statistics in log
According to the challenge homepage, a proposed algorithm is evaluated using the following six criteria: Average selected bitrate (Mbps), Average buffer occupancy (s), Average live latency (s), Average number of bitrate switches, Average number of stalls, Average stall duration (s).
However, only the switch history, stallDuration, avgLatency, and avgBufferLength are provided in the log after running a test mode. Here is the result I got:
Run complete
{
switchHistory: [
{ start: 8.821109, end: 9.978802, quality: [Object] },
{ start: 9.978802, end: 81.066866, quality: [Object] }
],
stallDuration: 63883.05500005663,
avgLatency: 12.028431111111123,
avgBufferLength: 0.08518444444444441
}
Done
Could you please update the code so that I can get all the above six statistics to evaluate my algorithm?
Changing playback rate is allowed or not?
Is it allowed to slow down or speed up the playback rate to avoid a stall or reduce the latency, respectively? dash.js is capable of doing it, however, it is not clear whether this capability can be used or not.
Perform a test run failed on Ubuntu 16.04
I got the following error when performing a test with 'node run.js' command on Ubuntu 16.04, 64bit.
$ node run.js
Error: Failed to launch the browser process! spawn /Applications/Google Chrome.app/Contents/MacOS/Google Chrome ENOENT
It seems the path for Chrome is not correctly configured.
Please give me any suggestions to correct this error.
Thanks,
Nguyen
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