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• RTMP to RTSP fluent-ffmpeg conversion

  13 avril 2020, par leon54

  I am trying to convert a real time video stream from RTMP protocol to RTSP protocol using node.js fluent-ffmpeg library.
I also incorporated node-media-server into my code, and called that ffmpegConversion method inside its "prePublish" hook.
Once I start my RTMP stream from OBS studio, conversion starts, and once I stop the stream it successfully ends.
But, the problem starts when I want to start the conversion again : It throws me a "Invalid argument error", even though the command was the same.
This is the command that gets executed first time I run it : "ffmpeg -i rtmp ://127.0.0.1/app/live -vcodec libx264 -filter:v scale=w=320:h=200 -f rtsp rtsp ://127.0.0.1:5554/mystream"
This is the command that gets runned every other time : "ffmpeg -i rtmp ://127.0.0.1/app/live -vcodec libx264 rtsp ://127.0.0.1:5554/mystream"
For some reason, it completely ignores the filters and format parameters.
This is how it looks like inside my code :

  



  function ffmpegConversion() {

    var one = ffmpeg('rtmp://127.0.0.1/app/live', { 
            timeout: 432000
        })
        .videoCodec('libx264')
        .on('start', function (commandLine) {
            console.log("FFMPEG Start has been triggered " + commandLine);
        })
        .on('stderr', function(stderrLine) {
            console.log('Stderr output: ' + stderrLine);
          })
        .on("progress", function (progress) {
            console.log('Timemark one: ' + progress.timemark + ' sec');
        })
        .on('codecData', function (data) {

            console.log('On codec data');
            // console.log(data);
        })
        .on('end', function (end) {
            console.log('file has ended converting succesfully ' + end);
        })
        .on('error', function (err) {
            console.log('an error happened: ' + err.message);
        })
        .save('rtsp://127.0.0.1:5554/mystream')
        .format("rtsp")
        .size('320x200');

}

//NODE MEDIA SERVER METHODS

nms.run();

nms.on('prePublish', (id, StreamPath, args) => {
    console.log('***NodeEvent on prePublish', `id=${id} StreamPath=${StreamPath} `);
    // let session = nms.getSession(id);
    // session.reject();
    ffmpegConversion(); 
});




  


• avformat/matroskaenc : Don't write elements with their default value

  14 avril 2020, par Andreas Rheinhardt

  avformat/matroskaenc : Don't write elements with their default value
  This has happened when writing chapters : Both editions as well as
  
  chapters are by default not hidden and given that we don't support
  
  writing hidden chapters at all, we don't need to write said elements at
  
  all. The same goes for ChapterFlagEnabled.
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
  

  • [DH] libavformat/matroskaenc.c

• avformat/mux : Remove redundant resetting

  11 avril 2020, par Andreas Rheinhardt

  avformat/mux : Remove redundant resetting
  Now that ff_interleave_add_packet() always returns blank packets, the
  
  input packet to ff_interleave_packet_per_dts() will always be blank on
  
  return as well (if supplied) and the same goes for interleave_packet()
  
  in mux.c. Document these facts and remove the redundant resetting that
  
  happened in av_interleaved_write_frame().
  The last reference to the (long removed) destruct field that AVPackets
  
  once had has been removed as well when updating the documentation of
  
  ff_interleave_packet_per_dts().
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
  

  • [DH] libavformat/internal.h
  • [DH] libavformat/mux.c