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• how to change ffmpeg to live555

  9 septembre 2015, par Yasin SOYASLAN

  I have a code with ffmpeg to get stream and record it.

  int Ret=avformat_open_input(&mFormatContext,rtspUrl,NULL,NULL);
  
  
  
  if(Ret<0){
  
      //debugl(2,"Could not connect to camera! Error code:%d\n",Ret);
  
      return FAIL;
  
  }

  so it fills AVFormatcontext and open a stream

  but i need to change of getting frame way. I’m using live555 to connect camera and get frame. Now I have data frames but i cannot fill FormatContext with that.

  Are there any function to fill FormatContext with live555 frames ?
  I’m stuck here

• How do I draw a line over a video whose width equals the current timeframe using FFMPEG

  19 août 2019, par Martin Mbae

  I am trying to draw a line across a video to show the progress of the video.

  Using FFMPEG I am able to draw a line using this code

  ffmpeg -i video.mp4 -vf drawbox=w=10:h=10:color=pink:t=fill output.mp4

  I, however want to alter the width of the line to be equal to "Total number of frames divided by the current frame"

  I am using this code

  ffmpeg -i video.mp4 -vf drawbox=w="%{frame_num/120}":h=10:color=pink:t=fill output.mp4

  which is giving me this error

  [Eval @ 00000072037fe4f0] Undefined constant or missing ’(’ in ’%frame_num/120’

  I have also tried the code below which is also not giving me what I want.

  ffmpeg -i video.mp4 -vf drawbox=w='text=%{frame_num/120}':h=10:color=pink:t=fill output.mp4

  How do I go about this. Specifically how to set the width of the box to be equal to the number of the current frame

• Send response only after the file has been converted

  19 octobre 2020, par Andrew Junior Howard

  I have the following code but I'm getting confused as to send the api response only after the file has been converted, not just when it uploads (which is what it currently does) :

  


  router.post('/uploadAudio/', function (req, res) {

    uploadAudio(req, res, function (err) {
        if (err) {
            // An error occurred when uploading
            throw err;
        }

        res.json({
            sucess: true,
            message: req.file.filename,
        });
            
        var proc = new ffmpeg({ source: '../game/src/assets/sounds/' + req.file.filename, nolog: true })
        
            proc.setFfmpegPath(ffmpegInstaller.path)
            proc

                // set output format to force
                .toFormat('ogg')

                // setup event handlers
                .on('end', function () {
                    console.log('file has been converted successfully');
                })
                .on('error', function (err) {
                    console.log('an error happened: ' + err.message);
                })
                // save to file <-- the new file I want -->
                .saveToFile('../game/src/assets/sounds/' + req.file.filename.replace(/\.[^/.]+$/, "") + '.ogg');
    });
});