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• avfilter/af_ashowinfo : properly show input channel layout for unknown channel layouts

  3 décembre 2016, par Marton Balint

  avfilter/af_ashowinfo : properly show input channel layout for unknown channel layouts
  Reviewed-by : Nicolas George <george@nsup.org>
  
  Signed-off-by : Marton Balint <cus@passwd.hu>
  

  • [DH] libavfilter/af_ashowinfo.c

• How to generating waveform from video & show it with video

  25 novembre 2016, par Salil

  We are using Rails as a backend & AngularJS on Front End side in my App where we need to show Video & audio waveform of that video.

  We are using ’wavesurfer.js’ to show the waveform on Front End side & ’node-pcm’ to generate pcm from video file on BackEnd side.

  This is working as expected but in some of the videos while creating waveform from pcm data instead of showing small sine waves we get flat line.
  Also it takes too much time to show the waveform for every page reload.

  To overcome this issue we are planning to create waveform image using ffmpeg

  ffmpeg -i 'https://s3.amazonaws.com/aadasdsadsadasdas/xyz.mp4' -filter_complex showwavespic -frames:v 1 output.png

  This is working fine but it also takes too much time (Ofcourse only once ) to generate the image for remote video (i.e. We are saving videos on S3)

  Problem with this i don’t get any library to integrate the waveform image with the Video.

  Can someone suggest any better approach related to this.

• android:video watermark show error

  27 avril 2016, par Sakibmohammad Syed

  I want to watermark video and below is my code but when I try to run then it show error like Failed to validate license file, existing!.

      public class MainActivity extends AppCompatActivity {
  
      private String strAudioFolderPath;
  
      @Override
  
      protected void onCreate(Bundle savedInstanceState) {
  
          super.onCreate(savedInstanceState);
  
          setContentView(R.layout.activity_main);
  
  
  
          // here my ffmpeg command to watermark video.
  
          String s = "ffmpeg -i /sdcard/Download/testing.mp4 -i /sdcard/temp1.jpg -filter_complex 'overlay=10:main_h-overlay_h-10' /sdcard/Download/out.mp4";
  
  
  
          GeneralUtils.deleteFileUtil(strAudioFolderPath + "vk.log");
  
          PowerManager powerManager = (PowerManager) this.getSystemService(Activity.POWER_SERVICE);
  
          PowerManager.WakeLock wakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "VK_LOCK");
  
          wakeLock.acquire();
  
          LoadJNI vk = new LoadJNI();
  
          try {
  
              try {
  
                  vk.run(GeneralUtils.utilConvertToComplex(s), strAudioFolderPath, MainActivity.this);
  
                  Log.e("Checking water marker", ">>>>>>>>>>>>>>>");
  
  
  
              } catch (Throwable e) {
  
              } finally {
  
                  if (wakeLock.isHeld())
  
                      wakeLock.release();
  
                  else {
  
                  }
  
              }
  
          } catch (Exception e)
  
          {
  
              e.printStackTrace();
  
          }        
  
      }
  
  }

  and error show in logcat like below.

      04-26 17:13:18.211 20492-20492/com.example.android.watermarkvideo I/Videokit: license file not found...
  
  04-26 17:13:18.211 20492-20492/com.example.android.watermarkvideo I/Videokit: license file /sdcard/Download/testing.mp4/ffmpeglicense.lic not created.
  
  04-26 17:13:18.211 20492-20492/com.example.android.watermarkvideo D/Videokit: license check rc: -3
  
  04-26 17:13:18.211 20492-20492/com.example.android.watermarkvideo E/Videokit: Failed to validate license file, existing!

  Actually I have used ffmpeg library to watermak on video file but it is not woking as well as I have not find any proper solution so please help.
  Thanks in advance.