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• Shaka Player returns 4001 error - Node.js local web server playing MPEG-DASH

  27 mai 2020, par salgarji

  I've used Chrome inspection tool to access 'Console' and analyze what is happening. Complete error information :

  



  D {severity: 2, category: 4, code: 4001, data: Array(1), handled: false}
category: 4
code: 4001
data: Array(1)
0: "http://localhost:8080/dash_segmentos/video.mpd"
length: 1
__proto__: Array(0)
handled: false
severity: 2
__proto__: Object


  



  My Server.js file :

  



  var http = require('http');
var fs = require('fs');

console.log(__dirname);

var path='dash_segmentos/video.mpd';
fs.access(path, fs.constants.R_OK | fs.constants.W_OK, (err) => {
    if (err) {
        console.log("%s doesn't exist", path);
    } else {
        console.log('can read/write %s', path);
    }
});

const PORT=8080; 

fs.readFile('./player.html', function (err, html) {

    if (err) throw err;    

    http.createServer(function(request, response) {  
        response.setHeader("Access-Control-Allow-Headers", "authorization, content-type");
        response.setHeader("Access-Control-Allow-Origin", "*");
        response.setHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
        response.writeHeader(200, {"Content-Type": "text/html"}); 
        response.write(html);  
        response.end();
    }).listen(PORT);
});


  



  As you can see I've added CORS (I guess it's correct) and a console.log to see if it's in the proper location. Furthermore, I've verified that file is accessible with fs.access and it returns can read/write dash_segmentos/video.mpd For this reason, I'm sure I am in the correct path and referencing the right file.

  



  The HTML code (player.html) provided to Server.js :

  



  &#xA;&#xA; &#xA; <code class="echappe-js">&lt;script type=&quot;text/javascript&quot;&amp;#xA;src=&quot;https://cdnjs.cloudflare.com/ajax/libs/shaka-player/2.5.11/shaka-player.compiled.js&quot;&gt;&lt;/script&gt;&#xA; &#xA; &#xA; 
  &#xA; &#xA; 
  &#xA;&#xA; &lt;script&gt;&amp;#xA;function initApp() { &amp;#xA;shaka.polyfill.installAll(); &amp;#xA;if (shaka.Player.isBrowserSupported()) { &amp;#xA; initPlayer(); &amp;#xA; } else { &amp;#xA; console.error(&amp;#x27;Browser not supported!&amp;#x27;);&amp;#xA; }}&amp;#xA;&amp;#xA;function initPlayer() { &amp;#xA;var video = document.getElementById( &amp;#x27;video&amp;#x27; );&amp;#xA;var player = new shaka.Player( video );&amp;#xA; window.player = player; &amp;#xA;player.addEventListener(&amp;#x27;error&amp;#x27;, onErrorEvent); &amp;#xA;player.load(path).then(function (){&amp;#xA;    console.log(&amp;#x27;Video loaded correctly&amp;#x27;);&amp;#xA; }).catch(onError);&amp;#xA;&amp;#xA;function onErrorEvent(event) {&amp;#xA; onError(event.detail); &amp;#xA; }&amp;#xA;function onError(error) {&amp;#xA; console.error(&amp;#x27;Codigo de error: &amp;#x27;, error.code, &amp;#x27; en &amp;#x27;, error);&amp;#xA; }&amp;#xA;}&amp;#xA;&lt;/script&gt;&#xA;&#xA;&lt;script&gt;&amp;#xA;var path=&amp;#x27;dash_segmentos/video.mpd&amp;#x27;;&amp;#xA;//var path=&amp;#x27;https://dash.akamaized.net/dash264/TestCases/2c/qualcomm/1/MultiResMPEG2.mpd&amp;#x27;;&amp;#xA;//the URL above is working! but it won&amp;#x27;t read my local mpd&amp;#xA;&amp;#xA;document.addEventListener(&amp;#x27;DOMContentLoaded&amp;#x27;, initApp);&amp;#xA;&amp;#xA; &lt;/script&gt;&#xA; &#xA;&#xA;
  

  



  I've tried changing the URL to an online resource and the player is properly working.

  



  My fluent-ffmpeg command which generates the video is :

  



  var ffmpeg = require('fluent-ffmpeg');

var grabacion = new ffmpeg();

grabacion.addInput('0')
.inputOptions(['-y -nostdin', '-f avfoundation', '-video_size 1280x720', '-framerate 30'])
.outputOptions(['-vcodec libx264', '-keyint_min 0', '-g 100', '-map 0:v', '-b:v 1000k', '-f dash',
 '-use_template 1', '-use_timeline 0', '-init_seg_name video0-$RepresentationID$-$Number$.mp4',
 '-media_seg_name video0-$RepresentationID$-$Number$.mp4','-single_file 0', '-remove_at_exit 0', '-window_size 20', '-seg_duration 4'])
.output('/path/to/files/dash_segmentos/video.mpd')
.run();


  



  The mpd manifest file is :

  



  &lt;?xml version="1.0" encoding="utf-8"?>&#xA;<mpd xmlns="urn:mpeg:dash:schema:mpd:2011" profiles="urn:mpeg:dash:profile:isoff-live:2011" type="static" mediapresentationduration="PT26.7S" maxsegmentduration="PT4.0S" minbuffertime="PT13.2S">&#xA;    <programinformation>&#xA;    </programinformation>&#xA;    <servicedescription>&#xA;    </servicedescription>&#xA;    <period start="PT0.0S">&#xA;        <adaptationset contenttype="video" startwithsap="1" segmentalignment="true" bitstreamswitching="true" framerate="30000/1001" maxwidth="1280" maxheight="720" par="16:9">&#xA;            <representation mimetype="video/mp4" codecs="avc1.7a001f" bandwidth="1000000" width="1280" height="720" sar="1:1">&#xA;                <segmenttemplate timescale="1000000" duration="4000000" initialization="video0-$RepresentationID$-$Number$.mp4" media="video0-$RepresentationID$-$Number$.mp4" startnumber="1">&#xA;                </segmenttemplate>&#xA;            </representation>&#xA;        </adaptationset>&#xA;    </period>&#xA;</mpd>&#xA;

  



  Is something about ffmpeg ? Permissions ? Pixel format ? Encoding ? I've tried with other mpd file provided by my Raspberry Pi using video4linux (v4l) and it returns the same error !

  



  I know that's a lot of code, but maybe you find it quicker than me. I guess it's a Shaka Player thing with the XML, but I can't explain how ffmpeg is wrongly creating XML code.

  



  Thank you in advance !!

  


• ffmpeg doesn't show download progress [closed]

  10 mars 2013, par Siddharth Ramakrishnan

  I run a mp3 site which converts video to mp3 from youtube and i have working script which works well on my another server. Recently changed my server and found that it is not showing download progress when downloading song from youtube instead it shows white page untill in downloads and then display the conversion progress. Confirmed with my site coder and he said that it is not php error. Error with ur server.

  You can check it here http://mp3world.mobi/details.php?code=jVl5s1e0Oo4&name=Chester+See+-+God+Damn+You%27re+Beautiful+%28Official+Music+Video%29

  I am unable to figure it out. Can anyone help me in this.

• lavc/h264 : Show "Increasing reorder buffer" message with loglevel info.

  27 janvier 2016, par Carl Eugen Hoyos

  lavc/h264 : Show "Increasing reorder buffer" message with loglevel info.
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