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• convert video to audio using ffmpeg

  5 mai 2024, par shakti goyal

  I'm trying to convert a video to mp3 using ffmpeg library but ffmpeg command is not working, it is returning the code 1

  


  Video conversion to MP3 failed with return code : 1

  


  try {
  final session = await FFmpegKit.execute('-i $videoFilePath -vn -ar 44100 -ac 2 -b:a 192k -f mp3 $audioFilePath');

  final returnCode = await session.getReturnCode();

  if (ReturnCode.isSuccess(returnCode)) {
    print('Video conversion to MP3 successful!');
  } else {
    print('Video conversion to MP3 failed with return code: $returnCode');
  }
} catch (e) {
  print('Error occurred during video conversion: $e');
}


  


  $videoFilePath - /Users/shaktigoyal/Library/Developer/CoreSimulator/Devices/9D514AC1-E245-4360-B876-745B9527B844/data/Containers/Data/Application/091D48E6-3AE4-4867-B3B2-2034854D27CE/tmp/image_picker_3DA6CDD3-C2F9-4313-98A1-40A7B0AED652-1298-00001B041C9F94E4trim.59BC5143-1EBA-4BB0-955C-EA1942FA56E3.MOV

  


  $audioFilePath - /Users/shaktigoyal/Library/Developer/CoreSimulator/Devices/9D514AC1-E245-4360-B876-745B9527B844/data/Containers/Data/Application/091D48E6-3AE4-4867-B3B2-2034854D27CE/Documents/audio-14.mp3

  


• ffmpeg progress percentage in php

  9 avril 2018, par Mr.ZZ

  ffmpeg.php

  $sCmd = "ffmpeg -i ".$image." -i ".$music." video.avi 1> progress.txt";
  
  $proc = popen($sCmd." 2>&1", "r");

  progress.php

  $content = @file_get_contents('progress.txt');
  
  if($content){
  
      preg_match("/Duration: (.*?), start:/", $content, $matches);
  
      $rawDuration = $matches[1];
  
      $ar = array_reverse(explode(":", $rawDuration));
  
      $duration = floatval($ar[0]);
  
      if (!empty($ar[1])) $duration += intval($ar[1]) * 60;
  
      if (!empty($ar[2])) $duration += intval($ar[2]) * 60 * 60;
  
      preg_match_all("/time=(.*?) bitrate/", $content, $matches);
  
      $rawTime = array_pop($matches);
  
      if (is_array($rawTime)){$rawTime = array_pop($rawTime);}
  
      $ar = array_reverse(explode(":", $rawTime));
  
      $time = floatval($ar[0]);
  
      if (!empty($ar[1])) $time += intval($ar[1]) * 60;
  
      if (!empty($ar[2])) $time += intval($ar[2]) * 60 * 60;
  
      $progress = round(($time/$duration) * 100);
  
      echo $progress;
  
  }

  progress.php final output was always 100, so it was easy with jquery to hide progress and show download button.

  BUT after changing ffmpeg.php with this command :

  $sCmd = "ffmpeg -loop 1 -r 1 -i ".$image." -i ".$music." -c:a copy -shortest video.avi 1> progress.txt";
  
  $proc = popen($sCmd." 2>&1", "r");

  progress.php output is different numbers above 100(thousands) and jquery can’t figure out ffmpeg process finished or not.

  How to get 100 when ffmpeg finishs working ? I think i need some changes in progress.php because final result in progress.txt is longer than before.

• Using JavaCV/FFMPEG to push byte buffer image via RTMP

  6 mai 2022, par ljnoah

  I have a USB camera that returns frames as a byte buffer type to which I would like to push/send via rtmp using JavaCV library to be viewed using VLC. According to this link : http://bytedeco.org/javacpp-presets/ffmpeg/apidocs/org/bytedeco/ffmpeg/ffmpeg.html. It should be possible, but I don't really have any experience with ffmpeg, but from what I've read in their github it should be possible, only, thus far I was not able to find an example on how to do it. Basically, I would like to store a byte buffer and send an image that is in variable instead of grabbing frames from a camera as my USB camera is not detected by android and needs external libraries to work.

  


  private byte[] FrameData = new byte[384 * 288 * 4];
  //private final Bitmap bitmap = Bitmap.createBitmap(PREVIEW_WIDTH, PREVIEW_HEIGHT, // Bitmap.Config.ARGB_8888); // creates a bitmap with the proper format in-case its needed
  private final IFrameCallback mIFrameCallback = new IFrameCallback() {
      @Override
      public void onFrame(final ByteBuffer frameData) {
          frameData.clear();
          frameData.get(FrameData, 0, frameData.capacity());
          }
  };


  


  This callback gives me the frames from my camera on the fly and writes it to FrameData, which I can compress to a bitmap if needed.

  


  My camera preview where I call the callback above :

  


    public void handleStartPreview(Object surface) {
      if ((mUVCCamera == null)) return;
      try {
          mUVCCamera.setPreviewSize(mWidth, mHeight, 1, 26, UVCCamera.DEFAULT_PREVIEW_MODE, UVCCamera.DEFAULT_BANDWIDTH, 0);
      } catch (IllegalArgumentException e) {
          try {
              mUVCCamera.setPreviewSize(mWidth, mHeight, 1, 26, UVCCamera.DEFAULT_PREVIEW_MODE, UVCCamera.DEFAULT_BANDWIDTH, 0);
              Log.e(TAG, "handleStartPreview4");
          } catch (IllegalArgumentException e1) {
              callOnError(e1);
              return;
          }
      }
      int result = mUVCCamera.startPreview();
      mUVCCamera.setFrameCallback(mIFrameCallback, UVCCamera.PIXEL_FORMAT_RGBX);
      mUVCCamera.startCapture();
      startRecording();
  }


  


  My question is How can I use this example :

  


   String ffmpeg = Loader.load(org.bytedeco.ffmpeg.ffmpeg.class);
 ProcessBuilder pb = new ProcessBuilder(ffmpeg, "-i", "/path/to/input.mp4", "-vcodec", "h264", "/path/to/output.mp4");
 pb.inheritIO().start().waitFor();


  


  to push my frames from the camera that are stored FrameData byte buffer via RTMP/RTSP to my server IP, even If I need to compress it to a bitmap before...