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• send browser camera to rtmp server

  22 juin 2022, par anamul

  i am using python and in frotnend javascript.

  


  I am using ffmpeg to push video to rtmp server.

  


  ffmpeg -y -f mp4 -stream_loop -1 -re -i myvideo.mp4
-b:v 3M -vcodec libx264 -r 30.0 -s 1280x720
-c:a copy -b:a 96k
-f flv "rtmps://dfdf222.global-contribute.live-video.net:443/app/"


  


  It is working well but i am not getting how to push to rtmp server of my browser camera ? i mean from javascript ?

  


  i am trying like this :

  


  &#xA;    <video autoplay="autoplay"></video>&#xA;&#xA;    <a href="#">open and stream</a>&#xA;&#xA;    <code class="echappe-js">&lt;script&gt;&amp;#xA;        function streamVideo () {&amp;#xA;            console.log(&amp;#x27;ddd&amp;#x27;)&amp;#xA;            navigator.mediaDevices.getUserMedia({&amp;#xA;            video: {&amp;#xA;&amp;#xA;            },&amp;#xA;            audio: {&amp;#xA;                &amp;#xA;            }&amp;#xA;            }).then(stream=&gt;{&amp;#xA;                console.log(stream)&amp;#xA;                document.getElementById(&amp;#x27;vid&amp;#x27;).srcObject = stream; &amp;#xA;            })&amp;#xA;&amp;#xA;        }&amp;#xA;    &lt;/script&gt;&#xA;&#xA;

  


  It is working but not getting any way to push from browser to rtmp server. I know browser doesnt support rtmp protocol, we need to send it from the backend but can i push to server so that it push to rtmp server ?

  


  Anyone know the way ?

  


• HTTP Header for Duration of a MP4 for HTML 5 video

  9 mars 2014, par Mustafa

  I am trying to stream MP4 video as it is encoded from a webserver. I believe I used the appropriate flags, but it is not working correctly. When I download the video from my stream and open it with VLC, it properly shows the duration. Since a socket is not seekable, I assume it writes the metadata to end ? My Chrome browser always shows 8 seconds duration. The first 8 seconds plays at the normal speed, but afterwards the pause button turns into play button and the video plays very fast, probably as fast as it is recieved. However the audio is played at normal speed. I tried document.getElementById('myVid').duration = 20000 but it is a readonly field.

  I wonder, is there anyway to explicitly state the duration in HTTP headers or in any other way ? I cannot find any documentation about it.

  ffmpeg -i - -vcodec libx264 -acodec libvo_aacenc -ar 44100 -ac 2 -ab 128000 -f mp4 -movflags frag_keyframe+faststart pipe:1 -fflags +genpts -re -profile baseline -level 30 -preset fast

  To close-voters, that thinks it is not programming related, I use it in my own server I coded, and I need to set the duration programatically via JavaScript or setting the HTTP header. I believe it may be related to both ffmpeg or http headers, that's why I posted it here.

  app.get("/video/*", function(req,res){
  
      res.writeHead(200, {
  
          'Content-Type': 'video/mp4',
  
      });
  
      var dir = req.url.split("/").splice(2).join("/");
  
      var buf = new Buffer(dir, 'base64');
  
      var src = buf.toString();
  
  
  
      var Transcoder = require('stream-transcoder');
  
      var stream = fs.createReadStream(src);
  
      // I added my own flags to this module, they are at below:
  
      new Transcoder(stream)
  
          .videoCodec('libx264')
  
          .audioCodec("libvo_aacenc")
  
          .sampleRate(44100)
  
          .channels(2)
  
          .audioBitrate(128 * 1000)
  
          .format('mp4')
  
          .on('finish', function() {
  
              console.log("finished");
  
          })
  
          .stream().pipe(res);
  
  });

  exec function in that stream-transcoder module,

      a.push("-fflags");
  
      a.push("+genpts");
  
      a.push("-re");
  
      a.push("-profile");
  
      a.push("baseline");
  
      a.push("-level");
  
      a.push("30");
  
      a.push("-preset");
  
      a.push("fast");
  
      a.push("-strict");
  
      a.push("experimental");
  
      a.push("-frag_duration");
  
      a.push("" + 2 * (1000 * 1000));
  
      var child = spawn('ffmpeg', a, {
  
          cwd: os.tmpdir()
  
      });

• avutil/opt : Print out numeric values of option constants

  17 septembre 2019, par Soft Works

  avutil/opt : Print out numeric values of option constants
  It's often not obvious how option constants relate to numerical values.
  
  Defaults are sometimes printed as numbers and from/to are always printed as numbers.
  
  Printing the numeric values of options constants avoids this confusion.
  
  It also allows to see which constants are equivalent.
  Before this patch :
    -segment_list_type <int>        E........ set the segment list type (from -1 to 4) (default -1)
  
       flat                         E........ flat format
  
       csv                          E........ csv format
  
       ext                          E........ extended format
  
       ffconcat                     E........ ffconcat format
  
       m3u8                         E........ M3U8 format
  
       hls                          E........ Apple HTTP Live Streaming compatible
  Afterwards :
    -segment_list_type <int>        E........ set the segment list type (from -1 to 4) (default -1)
  
       flat            0            E........ flat format
  
       csv             1            E........ csv format
  
       ext             3            E........ extended format
  
       ffconcat        4            E........ ffconcat format
  
       m3u8            2            E........ M3U8 format
  
       hls             2            E........ Apple HTTP Live Streaming compatible
  Signed-off-by : softworkz <softworkz@hotmail.com>
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavutil/opt.c