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• There is a video stream option and player. But can't find where to manage video and stream

  26 janvier 2018, par Chanaka De Silva

  I’m working on this repository. in this application, we can upload a video taken by a action camera or drone, and it uses GPS coordinates (lat,lang) and draw the path of the video in the map. And also we can play the video via the system too after upload.

  Bt the size of the video is too much high. So it take a lot of time to process video and also download and play when we host in a server. I wanted to reduce size. So I write this code.

  try {
  
  new ffmpeg('demo.mp4', function (err, video) {
  
      if (!err) {
  
          video
  
              .setVideoSize('50%', true, false)
  
              .setVideoFrameRate(30)
  
              .save('output.mp4', function (error, file) {
  
                  if (error) {
  
                      console.log("error : ", error);
  
                  }
  
                  if (!error)
  
                      console.log('Video file: ' + file);
  
              });
  
          console.log('The video is ready to be processed');
  
      } else {
  
          console.log('Error: ' + err);
  
      }
  
  });

  }

  But the issue is I can’t find where is the video coming from in this application. We need to pass like "demo.mp4" to my code as you can see. This is the index file if this application : https://github.com/chanakaDe/replay-lite/blob/master/frontend/index.html

  And this is the player file : https://github.com/chanakaDe/replay-lite/blob/master/frontend/player.js

  This is the file called api.js : https://github.com/chanakaDe/replay-lite/blob/master/frontend/api.js

  This file also has some video functions : https://github.com/chanakaDe/replay-lite/blob/master/gopro/index.js

  Please guys, sometimes you will see this questions as a silly question. But you have the repo to check and can you guys please check and let me know where to get a video file or stream to add my size reduce code ?

• Anomalie #3227 : Bug date de publication

  17 septembre 2014, par 毎日 erational -

  quelqu’un sur le forum http://forum.spip.net/fr_258722.html signale une erreur de type avec le mktime

• Synchronizing FFMPEG video frames using PTS

  10 août 2015, par DundeeDave

  I’m attempting to synchronize the frames decoded from an MP4 video. I’m using the FFMPEG libraries. I’ve decoded and stored each frame and successfully displayed the video over an OPENGL plane.

  I’ve started a timer just before cycling through the frames ; the aim being to synchronize the Video correctly. I then compare the PTS of each frame against this timer. I stored the PTS received from the packet during decoding.

  What is displayed within my application does not seem to play at the rate I expect. It plays faster than the original video file would within a media player.

  I am inexperienced with FFMPEG and programming video in general. Am I tackling this the wrong way ?

  Here is an example of what I’m attempting to do

              FrameObject frameObject = frameQueue.front();
  
  
  
              AVFrame frame = *frameObject.pFrame;
  
  
  
              videoClock += dt;
  
  
  
              if(videoClock >= globalPTS)
  
              {
  
                  //Draw the Frame to a texture
  
                  DrawFrame(&frame, frameObject.m_pts);
  
  
  
                  frameQueue.pop_front();
  
  
  
                  globalPTS = frameObject.m_pts;
  
              }

  Please note I’m using C++, Windows, Opengl, FFMPEG and the VS2010 IDE