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• error of streaming video using fluent-ffmpeg node.js module

  23 mai 2013, par user824624

  I am running the fluent-ffmpeg sample to stream the video, which works well. Now in contract show the video in flashe version based flowplayer, I am now using html5 version flowplayer, but it said the video file not found.

  app.get('/video2/abc', function(req, res) {
  
  
  
    console.log('/video/:filename');
  
    res.contentType('mp4');
  
    var pathToMovie = 'public/flowplayer/470x250.mp4' ; 
  
    var proc = new ffmpeg({ source: pathToMovie, nolog: true })
  
      .writeToStream(res, function(retcode, error){
  
        if(error) console.error('error',error); 
  
        else console.log('file has been converted succesfully');
  
      });
  
  });

  here is my html template.

      
  
          
  
          <code class="echappe-js">&lt;script src=&quot;http://ajax.googleapis.com/ajax/libs/jquery/1.8/jquery.min.js&quot;&gt; &lt;/script&gt;
          
  &lt;script src=&quot;http://releases.flowplayer.org/5.4.0/flowplayer.min.js&quot;&gt;&lt;/script&gt;
  &lt;script&gt;<br />
  
     // global configuration (optional)<br />
  
     flowplayer.conf = {<br />
  
        rtmp: &quot;rtmp://s3b78u0kbtx79q.cloudfront.net/cfx/st&quot;,<br />
  
        swf: &quot;http://releases.flowplayer.org/5.4.0/flowplayer.swf&quot;<br />
  
     };<br />
  
  <br />
  
     // force flash with query - only for testing, do not use this switch in production!<br />
  
     if (/flash/.test(location.search)) flowplayer.conf.engine = &quot;flash&quot;;<br />
  
  <br />
  
     // install player manually<br />
  
     $(function() {<br />
  
        $(&quot;.player&quot;).flowplayer({<br />
  
           // reverse fraction of video aspect ratio<br />
  
           // video dimensions: 470px / 250px<br />
  
           ratio: 25/47<br />
  
        });<br />
  
     });<br />
  
  &lt;/script&gt;
      
  
          
      
  

• FFDEC_H264 dropping non-key frames

  15 avril 2013, par Kranti

  I am working on a sample GStreamer application to play MPEG2TS Video.

  My pipeline is :

  appsrc ! h264parse ! ffdec_h264 ! ffmpegcolorspace ! ximagesink

  If I pump the data without setting any timestamp, all the frames are getting played

  videoBuffer = gst_app_buffer_new (rawVideo, bufSize, test_free_video, rawVideo);

  But if I set the timestamp to the buffer, only I-frames are getting played :

  videoBuffer = gst_app_buffer_new (rawVideo, bufSize, test_free_video, rawVideo);
  
  GST_BUFFER_TIMESTAMP(videoBuffer)  = calc_timestamp(rawVideo);

  calc_timestamp() is a function to calculate timestamp based on PES header info

  From the GST_LOGS :

  Dropping non-keyframe (seek/init)
  
  Dropping non-keyframe (seek/init)
  
  Dropping non-keyframe (seek/init)

  The above logs are getting repeated. I don't have any clue, why is this happening ? Any input would be appreciated.

  Thanks in advance,
  Kranti

• ffmpeg wav output length not correct or consistant

  3 avril 2013, par user2241026

  Trying to run a very simple command via php a exec() command. All my other commands are working fine except for a simple audio trim that I am trying to run.

  The user posts a file, and a start time (in mm:ss.xxx format). and ffmpeg is supposed to trim the file to 5 seconds after the start time. The problem is, some times it works, but other times the audio file is 6 or even 7 seconds long. I can't figure out the problem.

  Oh, I'm aware of the lack of sanitizing in the code right now.

  here is the PHP code

  //user entered number for example "01:30"
  
  //$newFilePath1 is the location of the file, no issue there
  
  $starttime = $_POST["starttime"];
  
  
  
  $makeWav1 = "ffmpeg -y -ss 00:".$starttime." -i \"$newFilePath1\" -acodec pcm_s16le -sample_rate 48000 -t 00:00:05.000 temp/audiocut1.wav";
  
  
  
  exec($makeWav1);

  Thank you for the help !!