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• Add a moving watermark that changes position every x seconds with ffmpeg

  8 novembre 2019, par David Tran

  Currently, I add a watermark to the bottom right of my video to prevent others from republishing it. However, they blur the watermark so I’m thinking of adding a moving watermark that changes its position every x seconds.

  Below is my current ffmpeg command :

  ffmpeg -i input.mp4 -i logo.png -filter_complex "[1][0]scale2ref=iw/4:ow*90/272[wm][vid];[vid][wm]overlay=W-w-W*10/100:H-h-H*5/100" -preset veryfast output.mp4

  How can I make the watermark position from the bottom right to top right, to top left, and bottom left every 30 seconds ? Thank you.

• How to watermark on video in android using ffmpeglibrary programmatically

  2 mai 2016, par Sakibmohammad Syed

  I want to watermark one video file using ffmpeg library. I have one png, one mp4 file in my Videokit folder and I want to watermark png image to video file and below is my code but I don’t know why I am unable to watermark on it. I have no more idea about implementation of ffmpeg library so please help me to solve such issue.
  Here is my MainActivity.

      public class MainActivity extends AppCompatActivity {
  
      @Override
  
      protected void onCreate(Bundle savedInstanceState) {
  
          super.onCreate(savedInstanceState);
  
          setContentView(R.layout.activity_main);
  
  
  
          String workFolder = "/sdcard/Videokit/";
  
  
  
          GeneralUtils.deleteFileUtil(workFolder + "/vk.log");
  
  
  
          PowerManager powerManager = (PowerManager) this.getSystemService(Activity.POWER_SERVICE);
  
          PowerManager.WakeLock wakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "VK_LOCK");
  
          wakeLock.acquire();
  
          String commandStr = "ffmpeg -i /sdcard/Videokit/test.mp4 -i /sdcard/Videokit/test.png -filter_complex transpose=1,overlay=10:10 -y /sdcard/out.mp4";
  
  
  
          LoadJNI vk = new LoadJNI();
  
          try {
  
              vk.run(GeneralUtils.utilConvertToComplex(commandStr), workFolder, MainActivity.this);
  
              GeneralUtils.copyFileToFolder(commandStr, workFolder);
  
          } catch (CommandValidationException e) {
  
              Log.e("Prefs.TAG", "vk run exeption.", e);
  
          }
  
      }
  
  }

  Here is my Manifest.xml

          <?xml version="1.0" encoding="utf-8"?>
  
  <manifest package="com.example.android.compressexample">
  
  
  
      
  
      
  
      
  
      
  
      
  
  
  
      <application>
  
          <activity>
  
              
  
                  <action></action>
  
  
  
                  <category></category>
  
              
  
          </activity>
  
      </application>
  
  </manifest>

• FFmpeg watermark duration

  4 mai 2016, par user2364292

  I am developing an Android app, which will work with FFmpeg library which only applies multiple watermarks on some test.mp4 video. For that case I am using the Android java library for FFmpeg binary from that source : [http://writingminds.github.io/ffmpeg-android-java/] which is working fine for some examples, but I just can not use commands like these :

  -i /storage/emulated/0/Download/test.mp4 -vf "movie=/storage/emulated/0/Download/test.mp4 [logo]; [in][logo] overlay=W-w-10:H-h-10, fade=in:0:20 [out]" /storage/emulated/0/Download/test.mp4

  Please note these quotes after -vf flag and these [in], [logo] flags. These just throw me an errors like

  [NULL @ 0xb5bf3200] Unable to find a suitable output format for '[logo];'
  
  [logo];: Invalid argument

  and so on. The quotes in the command are also the problem which throws me an error like :

  [AVFilterGraph @ 0xb5c092c0] No such filter: 'overlay=main_w-50:main_h-50,overlay=0:0'
  
  Error initializing complex filters.
  
  Invalid argument".

  Am I even using proper library for that case ? I also want to show the watermark in specific duration of the video. For example if video is 10 seconds long, I only want watermark to be shown starting from 3rd second of the video to 7th second. I can show the overlay images like this :

  -i /storage/emulated/0/Download/test.mp4 -i /storage/emulated/0/Download/test.jpg -i /storage/emulated/0/Download/test.jpg -filter_complex overlay=main_w-50:main_h-50,overlay=0:0 -codec:a copy /storage/emulated/0/Download/test_edited.mp4

  but they’re shown for the whole video duration. Where can I set the duration start/end for the specific overlay ?

  Thank you very much !