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• Java merge ? mix ? 2 audio files(mp3) parallely and download it

  4 février 2024, par JoonSeo Yang

  is there any way to mix 2 audio files parallely and let user download it ?

  


  I was trying it by ffmpeg

  


  FFmpegBuilder builder = new FFmpegBuilder()
                .overrideOutputFiles(true)
                .setInput(audioInputPath1)
                .addInput(audioInputPath2)
                .addOutput(outputFilePath)
                .setFormat("mp3")
                .setAudioCodec("libmp3lame")
                .setAudioBitRate(256000)
                .done();

        executor.createJob(builder).run();


  


  but it doesnt work by codec problem, so i want to know if there any other way to reach my goal, or fix my ffmpeg code to make it work ?

  


• download rtmp live stream video secondly

  15 juillet 2024, par Chenguang He

  I'm working on a java project to create a rtmp server and download the real-time flv video every second(need to download multiple recording frame secondly instead of download entire recording after live stream finished)
This is my logic, firstly listen to the rtmp channel to write video and audio into file

  


  if(msg instanceof VideoMessage vm){
byteArrayOutputStream = new ByteArrayOutputStream();
 byteArrayOutputStream.writeBytes(vm.getVideoData());
            File file = new File("tmp/video_" + i);
            FileOutputStream fos = new FileOutputStream(file);
            fos.write(byteArrayOutputStream.toByteArray());
            fos.close();

}


  


  Then decode to H264 to get playable flv file

  


  FFmpegFrameGrabber grabber = new FFmpegFrameGrabber(input);
grabber.setFormat("h264");
        grabber.start();
FFmpegFrameRecorder recorder = new FFmpegFrameRecorder(outputFilePath, grabber.getImageWidth(), grabber.getImageHeight());
recorder.start();
while ((frame = grabber.grab()) != null) {
            recorder.record(frame);
        }
grabber.stop();
        grabber.release();
        recorder.stop();
        recorder.release();
}


  


  But this login was failed. I met this issue when I implemented the ffmpeg

  


  data partitioning is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.


  


  Is there any other idea to solve this or other way to achieve the logic ? Thanks

  


• Download TS files from video stream

  8 juillet 2021, par Nicky Smits

  Videos on most sites make use of progressive downloading, which means that the video is downloaded to my computer, and easy to trace. There are lots of extensions out there to do this, and even in the dev-tools this is easily done.

  



  On certain websites videos are streamed. which means that we do no just download 1 file, we download lots of small packages. In the dev-tools these packages can be traced. The website I'm interested in is : http://www.rtlxl.nl/# !/goede-tijden-slechte-tijden-10821/c8e2bff7-5a5c-45cb-be2b-4b3b3e866ffb.

  



  -The packages have a .TS extension.

  



  -Packages can be saved by copying the url of the request

  



  -I can not play these files.

  



  I must have done something wrong, or I'm missing something. I want to know what I am doing wrong. I want to create a chrome extension for personal use which captures the urls of all the packages. when I have all the urls I want to pass them on to a php scripts which downloads them and uses ffmpeg to paste them into a mp4 file.

  



  Please help me get the packages.