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• Shaka Player : ignore empty AdaptationSet

  24 juin 2019, par Mitya

  I’m trying to play DASH stream in Shaka Player.
  Sometimes the stream doesn’t have an audio source and its manifest file contains an empty AdaptationSet entry.
  In this case Shaka Player returns the manifest parsing error :

  | DASH_EMPTY_ADAPTATION_SET | 4003 | number |  The DASH Manifest contained an AdaptationSet with no Representations. |

  Is it possible to ignore this error somehow and play the video without audio source ?

  Example of manifest file :

  <?xml version="1.0" encoding="utf-8"?>
  
  <mpd xmlns="urn:mpeg:dash:schema:mpd:2011" profiles="urn:mpeg:dash:profile:isoff-live:2011" type="dynamic" minimumupdateperiod="PT4S" suggestedpresentationdelay="PT4S" availabilitystarttime="2019-06-24T13:38:04Z" publishtime="2019-06-24T13:38:34Z" timeshiftbufferdepth="PT14.9S" minbuffertime="PT9.9S">
  
      <programinformation>
  
          
  
      </programinformation>
  
      <period start="PT0.0S">
  
          <adaptationset contenttype="video" segmentalignment="true" bitstreamswitching="true">
  
              <representation mimetype="video/mp4" codecs="avc1.640028" bandwidth="2000000" width="1920" height="1080" framerate="20/1">
  
                  <segmenttemplate timescale="10240" initialization="init-stream$RepresentationID$.m4s" media="chunk-stream$RepresentationID$-$Number%05d$.m4s" startnumber="5">
  
                      <segmenttimeline>
  
                          <s t="201697" d="51190" r="2"></s>
  
                      </segmenttimeline>
  
                  </segmenttemplate>
  
              </representation>
  
          </adaptationset>
  
          <adaptationset contenttype="audio" segmentalignment="true" bitstreamswitching="true">
  
          </adaptationset>
  
      </period>
  
  </mpd>

• how to make rtmp streaming player on windows phone 8

  9 avril 2014, par user3334845

  i am making basic online live tv program on wp8.I'am use to Microsoft.Web.Media.SmoothStreaming framework and Microsoft Player Framework (Microsoft.PlayerFramework.WP8.Core, Version=1.8.2.2). My app is play http mms and rtsp with this framework. But not play rtmp live streams :S. I'm stucked. I'm search about how play rtmp on wp8. And i am found two thinks :
  1-) ffmpeg core (librtmp) (https://code.google.com/p/rtmp-mediaplayer/)
  2-)FluorineFx (http://www.fluorinefx.com/download.html)

  i am trying first librtmp but this code is so complex for me:S
  and i am trying B plan FluorineFx, install it and trying add dll wp8 reference but program get error "this dll is making for visual studio 2008", and trying FluorineFx samples in programfiles directory, but same error vs2008 works not current:S.

  I'm stuck here please help me.

• Issue with streaming in realtime to HTML5 video player

  24 juillet 2023, par ImaSquareBTW

  ok so i created a project which should take an mkv file convert it to a sutaible fomrat in relatime and play it as it transcodes in the html 5 video player and should play as soon as small segement is ready for playback but unfornatlly it does seem to work heres my code if your curious, help would be very much appreicted

  


  &#xA;&#xA;  &#xA;    &#xA;  &#xA;  &#xA;    <video controls="controls">&#xA;      <source src="output.mp4" type="video/mp4">&#xA;    </source></video>&#xA;    <code class="echappe-js">&lt;script src=&quot;https://cdnjs.cloudflare.com/ajax/libs/ffmpeg/0.11.6/ffmpeg.min.js&quot; integrity=&quot;sha512-91IRkhfv1tLVYAdH5KTV&amp;#x2B;KntIZP/7VzQ9E/qbihXFSj0igeacWWB7bQrdiuaJVMXlCVREL4Z5r&amp;#x2B;3C4yagAlwEw==&quot; crossorigin=&quot;anonymous&quot; referrerpolicy=&quot;no-referrer&quot;&gt;&lt;/script&gt;&#xA;    &lt;script src='http://stackoverflow.com/feeds/tag/player.js'&gt;&lt;/script&gt;&#xA;  &#xA;&#xA;

  


  and my javscript :

  


  let mediaSource;
let sourceBuffer;
let isTranscoding = false;
let bufferedSeconds = 0;

async function setupMediaSource() {
  mediaSource = new MediaSource();
  const videoPlayer = document.getElementById('video-player');
  videoPlayer.src = URL.createObjectURL(mediaSource);
  await new Promise(resolve => {
    mediaSource.addEventListener('sourceopen', () => {
      sourceBuffer = mediaSource.addSourceBuffer('video/mp4; codecs="avc1.64001E, mp4a.40.2"'); // Match the transcoded format
      sourceBuffer.addEventListener('updateend', () => {
        if (!sourceBuffer.updating && mediaSource.readyState === 'open') {
          mediaSource.endOfStream();
          resolve();
        }
      });
    });
  });
}

async function transcodeVideo() {
  const ffmpeg = createFFmpeg({ log: true });
  const videoPlayer = document.getElementById('video-player');

  await ffmpeg.load();
  const transcodeCommand = ['-i', 'The Legend of Old Gregg S02E05.mkv', '-c:v', 'libx264', '-preset', 'ultrafast', '-c:a', 'aac', '-strict', 'experimental', '-f', 'mp4', '-movflags', 'frag_keyframe+empty_moov', 'output.mp4'];

  const videoUrl = 'The Legend of Old Gregg S02E05.mkv'; // The URL of the original video file

  let lastBufferedSeconds = 0;
  let currentTime = 0;
  while (currentTime < videoPlayer.duration) {
    if (!isTranscoding && sourceBuffer.buffered.length > 0 && sourceBuffer.buffered.end(0) - currentTime < 5) {
      isTranscoding = true;
      const start = sourceBuffer.buffered.end(0);
      const end = Math.min(videoPlayer.duration, start + 10);
      await fetchAndTranscode(videoUrl, start, end, ffmpeg, transcodeCommand);
      isTranscoding = false;
      currentTime = end;
      bufferedSeconds += (end - start);
      const transcodingSpeed = bufferedSeconds / (currentTime);
      lastBufferedSeconds = bufferedSeconds;
      console.log(`Transcoded ${end - start} seconds of video. Buffered: ${bufferedSeconds.toFixed(2)}s (${transcodingSpeed.toFixed(2)}x speed)`);
    }
    await new Promise(resolve => setTimeout(resolve, 500));
  }

  await ffmpeg.exit();
}

async function fetchAndTranscode(url, start, end, ffmpeg, transcodeCommand) {
  const response = await fetch(url, { headers: { Range: `bytes=${start}-${end}` } });
  const data = new Uint8Array(await response.arrayBuffer());
  ffmpeg.FS('writeFile', 'input.mkv', data); // Use 'input.mkv' as a temporary file
  await ffmpeg.run(...transcodeCommand);
  const outputData = ffmpeg.FS('readFile', 'output.mp4');
  appendSegmentToBuffer(outputData);
}

function appendSegmentToBuffer(segment) {
  if (!sourceBuffer.updating) {
    sourceBuffer.appendBuffer(segment);
  } else {
    sourceBuffer.addEventListener('updateend', () => {
      sourceBuffer.appendBuffer(segment);
    });
  }
}

async function createFFmpeg(options) {
  const { createFFmpeg } = FFmpeg;
  const ffmpeg = createFFmpeg(options);
  await ffmpeg.load();
  return ffmpeg;
}

(async () => {
  await setupMediaSource();
  await transcodeVideo();
})();