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• Is Java fast enough to do live screensharing ?

  10 mars 2012, par user1260501

  For the past few months, a developer and I have been working on a screensharing applet that streams to a media server like Wowza or Red5, but no matter what we do, we have about 5 seconds of latency, which is too long for a live application where people are interacting with each other. We've tried xuggle, different encoders, different players, different networks, different media servers, and even streaming locally, there's significant latency.

  So, I'm beginning to wonder…

  Is Java fast enough to do live screensharing ?

  I've seen lots of screen recording applets written in Java, but none of them are streaming live. Everything that's done live, such as GoToMeeting, seems to use C++. I'm thinking maybe there's a reason.

  It's not a compression problem. Using ScreenVideo, we've compressed an hour-long stream down to about 100 MB, and we have plenty of bandwidth. The processor isn't overloaded doing the compression, either, but it seems to be taking too much time. We are getting the best results from some code pulled out of BigBlueButton, but still, the latency is terrible.

  Streaming the WebCam, on the other hand, is nice and snappy. Almost no latency at all. So, the problem is the applet.

  The only other idea I can think of is somehow emulating a WebCam with Java. Not sure if that would be faster or not.

  Ideas ? Or should I just give up on Java and do this in C++ ? I would hate to do that, because then I would have to create different versions for different platforms, but if it's the only way, it's the only way.

• jwplayer slow buffer video lag

  8 juillet 2015, par user281738

  I’m using Jwplayer for my mobile site... So i need mobile capability html5 player.. i choose jwplayer.

  I’m Converting Video with ffmpeg

  ffmpeg -i Input.mp4 -vcodec h264 -b 1400k -s 1280X720 -acodec libfaac -ac 2 -ab 128k -movflags faststart -y Output.mp4

  I’m Using Centos Apache server and so i installed H264 Streaming Module

  My videos are starting fast at first.. but in middle when my internet slows and buffering slows down.. At the same time video lags and sounds continues for few second ... at some point my video and audio sync well. This is happening because of slow buffer problem.. After whole video buffered when i replay..full video is playing well .
  I Used Some Android Phones Chrome Browser To Check .
  I need playing position to Show load Icon and wait if buffer slows.. not lag video

  I cant lower my video bitrate.. because of my competitors.. i want solution for my html5 player.. i have added my jwplayer code.

  <code class="echappe-js">&lt;script&gt;    jwplayer(&quot;myElement&quot;).setup({<br />
  
          width: &quot;100%&quot;,<br />
  
          skin: &quot;skin.xml&quot;,<br />
  
          autostart: true,<br />
  
  <br />
  
          sharing: {},<br />
  
        image: &quot;http://example.com/Mp4/screen.jpg&quot;,<br />
  
  <br />
  
        sources: [{<br />
  
          file: &quot;http://example.com/720.mp4&quot;,<br />
  
          label: &quot;720p&quot;,<br />
  
          &quot;default&quot;: &quot;true&quot;<br />
  
        },{<br />
  
          file: &quot;http://example.com/HD/hd.mp4&quot;,<br />
  
          label: &quot;HD&quot;<br />
  
        },{<br />
  
          file: &quot;http://example.com/Mp4/480x320.mp4&quot;,<br />
  
          label: &quot;480p&quot;<br />
  
        }],<br />
  
        startparam: &quot;starttime&quot;,<br />
  
          stretching: &quot;exactfit&quot;,<br />
  
          autostart: false,<br />
  
      });<br />
  
  <br />
  
  <br />
  
  <br />
  
  &lt;/script&gt;
  
  

• Which is better solution using ffmpeg ? [closed]

  2 janvier 2020, par Munkhbat Mygmarsuren

  I am working on web and mobile app project using ffmpeg. It’s need to integrate 2 or more audio or video files.
  Question is, which solution is better ?
  I’ll use ffmpeg on server, or install ffmpeg on client device before using app.

  I want to using ffmpeg on server. But I am thinking, it’s maybe server slows down when multiple users send a request at the same time to server.