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• flutter :can i make the input file & the output file the same in ffmpeg command ?

  17 juillet 2022, par Khaled Mortaja

  I am using this command for applying a crop operation on a video stored on my internal storage $x is the location of the video , I do not want a new output file to be created, i just want the cropped video to overwrite the input video, so any changes on the video will be applied to the original video location.
i used this command but it did not work

  


  FFmpegKit.execute("-i $x -ss 00:00:01 -t 00:00:10 -c copy $x")


  


  any suggestions...
thanks in advance

  


• Recording from an ImageView using FFmpegFrameRecorder

  8 novembre 2015, par UserAx

  I want to convert images displayed in a imageview to a video using FFmpegFrameRecorder, and add audio using mic as the source

  I have imported JavaCV to my project(javacv.jar, javacpp.jar, opencv.jar , openv-android-arm.jar, ffmpeg.jar, ffmpeg-android-arm.jar ; added them under project structure/dependencies)

  I am using this code https://github.com/gderaco/JavaCVTest/tree/master

  I get error as "record (org.bytedeco.javacv.Frame) in FFmpegFrameRecorder cannot be applied to (org.bytedeco.javacpp.opencv_coreiplImage)"

  where have i gone wrong and how to add mic as the audio source ?

  CODE:
  
  import..
  
  
  
  import org.bytedeco.javacpp.opencv_core;
  
  import org.bytedeco.javacv.FFmpegFrameRecorder;
  
  
  
  import static org.bytedeco.javacpp.opencv_imgcodecs.cvLoadImage;
  
  
  
  public class MyAndroidAppActivity extends Activity {
  
  
  
  ImageView image;
  
  
  
  @Override
  
  public void onCreate(Bundle savedInstanceState) {
  
  super.onCreate(savedInstanceState);
  
  setContentView(R.layout.main);
  
  
  
  addListenerOnButton();
  
  
  
  opencv_core.IplImage img = cvLoadImage("ImageView");
  
  
  
  FFmpegFrameRecorder recorder = new                
  
  FFmpegFrameRecorder("/sdcard/test.mpeg",200,150);
  
  
  
      try {
  
          recorder.setFrameRate(30);
  
          recorder.start();
  
  
  
          for (int i=0;i<100;i++)
  
          {
  
              recorder.record(img);
  
          }
  
          recorder.stop();
  
      }
  
      catch (Exception e){
  
          e.printStackTrace();
  
      }
  
  
  
  }
  
  
  
  public void addListenerOnButton() {
  
  
  
  image = (ImageView) findViewById(R.id.imageView1);
  
  button = (Button) findViewById(R.id.btn1);
  
  
  
  button.setOnClickListener(new OnClickListener() {
  
      @Override
  
      public void onClick(View arg0) {
  
          image.setImageResource(R.drawable.image1);
  
      }
  
  });
  
  
  
  //...........
  
  
  
  button = (Button) findViewById(R.id.btn10);
  
  
  
  button.setOnClickListener(new OnClickListener() {
  
      @Override
  
      public void onClick(View arg0) {
  
          image.setImageResource(R.drawable.image10);
  
      }
  
  
  
  });
  
  }

• AAC encoder : memoize quantize_band_cost

  12 octobre 2015, par Claudio Freire

  AAC encoder : memoize quantize_band_cost
  The bulk of calls to quantize_band_cost are replaced
  
  by a call to a version that memoizes, greatly improving
  
  performance, since during coefficient search there is
  
  a great deal of repeat work.
  Memoization cannot always be applied, so do this in a
  
  different function, and leave the original as-is.
  

  • [DH] libavcodec/Makefile
  • [DH] libavcodec/aaccoder_twoloop.h
  • [DH] libavcodec/aacenc.c
  • [DH] libavcodec/aacenc.h
  • [DH] libavcodec/aacenc_quantization.h
  • [DH] libavcodec/aacenc_quantization_misc.h
  • [DH] libavcodec/mips/aaccoder_mips.c