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• prevent ffmpeg from opening console window

  10 février 2020, par Yesub

  I have a node/express server which is used to give streams from IP camera to a website. Everything is working well. I run that webserver with PM2 on a windows server.

  The problem : for each stream I have a windows console opening with just nothing logged in. The console reopen when I try to close it.

  Is there a way to prevent those console to open ?

  Here is the related node.js code :

  const { NodeMediaServer } = require('node-media-server');
  
  
  
  private _initiate_streams(): void{
  
      DatabaseProvider.instance.camerasDao.getCamerasList().pipe(
  
        take(1)
  
      ).subscribe(
  
          (databaseReadOperationResult: DatabaseReadOperationResult) => {
  
              if (databaseReadOperationResult.successful === true){
  
                const cameras = databaseReadOperationResult.result;
  
                const tasks = [];
  
                cameras.forEach( camera => {
  
                  tasks.push(
  
                    {
  
                      app : config.get('media_server.app_name'),
  
                      mode: 'static',
  
                      edge: camera.rtsp_url,
  
                      name: camera.stream_name,
  
                      rtsp_transport: 'tcp'
  
                    }
  
                  )
  
                });
  
  
  
                const configMediaServer = {
  
                  logType: 3, // 3 - Log everything (debug)
  
                  rtmp: {
  
                      port: 1935,
  
                      chunk_size: 60000,
  
                      gop_cache: true,
  
                      ping: 60,
  
                      ping_timeout: 30
  
                  },
  
                  http: {
  
                      port: config.get('media_server.port'),
  
                      allow_origin: '*'
  
                  },
  
                  auth: {
  
                      play: true,
  
                      api: true,
  
                      publish: true,
  
                      secret: config.get('salt'),
  
                      api_user: 'user',
  
                      api_pass: 'password',
  
                  },
  
                  relay: {
  
                      ffmpeg: 'C:\\FFmpeg\\bin\\ffmpeg.exe',
  
                      tasks: tasks
  
                  }
  
                };
  
  
  
                var nms = new NodeMediaServer(configMediaServer)
  
                nms.run();
  
              } else {
  
                  // catch exception
  
              }
  
          }
  
      );
  
    }

• ffmpeg build on mac with videotoolbox enabled becomes unportable

  22 janvier 2020, par Alexander Novikov

  If i configure ffmpeg this way :

  ./configure --disable-everything --enable-static --disable-shared \
  
  --enable-gpl --enable-nonfree --enable-encoder=h264_videotoolbox,aac \ 
  
  --enable-muxer=mp4 --enable-protocol=file --enable-libfdk-aac 
  
  --enable-videotoolbox --disable-autodetect

  it works for my purposes (allows to encode h264 video with aac audio on Mac’s videotoolbox - an Apple QSV toolkit), but if i send it to any other computer except the one it was built on, it fails with something like this :

  dyld: Symbol not found: _kCVImageBufferTransferFunction_ITU_R_2100_HLG
  
    Referenced from: /Users/admin/Downloads/./ffmpeg
  
    Expected in: /System/Library/Frameworks/CoreVideo.framework/Versions/A/CoreVideo
  
   in /Users/admin/Downloads/./ffmpeg
  
  Abort trap: 6

  if i rebuild it this way :

  ./configure --disable-everything --enable-static --disable-shared
  
  --enable-gpl --enable-nonfree --enable-encoder=aac 
  
  --enable-muxer=mp4 --enable-protocol=file --enable-libfdk-aac 
  
  --disable-autodetect

  so with everything else but videotoolbox removed, it runs successfully on any other computer, so apparently ffmpeg needs to carry along something it doesn’t, for videotoolbox to work...

  i am actually building a C++ app with ffmpeg’s static libraries, but explaining what i do there will be a very long story and error message produced is exactly the same if i run it on different machines, so i better illustrate it on example of ffmpeg console utility itself.

  what are the configure switches i need to do to make the ffmpeg build portable please ?

• How to add outro background music to another audio file with FFMpeg ?

  8 novembre 2019, par Sebastian

  I have two files : story.wav (180 seconds) and background-music.wav (90 seconds). I need a FFMpeg command that merges the two files and fades in background-music.wav (with esin) 30 seconds before the end of story.wav.

  I have this in separate commands :

  ffmpeg -i background-music.wav -filter_complex afade=t=in:curve=esin:ss=0:d=30 fadein.wav
  
  ffmpeg -i fadein.wav -af "adelay=150000|150000" delayed.wav
  
  ffmpeg -i delayed.wav -i story.wav -filter_complex amix=inputs=2:duration=longest final.wav

  This is ugly - and it has the problem, that the volume of the first part is only 50% (the volume should be kept).

  There must be an elegant way to achieve this in one command - but how ?

  Bonus question : how can I convert the result to mp3 (with parameters like bit rate set) in the same command ?

  Thanks for any help !
  Sebastian