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• FFmpeg - add an animated gif (cropped by mask) to the video

  11 mars 2021, par zeromodule

  I have 3 inputs :

  


  

  1. Video file : https://file.io/6jtUlnZ7TGmT

  


  2. Animated GIF with transparent background https://i.imgur.com/Vo3KHZm.gif

  


  3. Mask file (BW) the same resolution as the video https://i.imgur.com/YJXUUrZ.png

  


  


  I want to put the image on the video, but throw out all GIF pixels that are transparent in the mask (replace them with transparent ones).

  


  
  

  

  


  


  My current command, without masking (it works fine) :

  


  ffmpeg -i input.mp4 -ignore_loop 0 -i animation.gif \
-filter_complex "[1]scale=700x700[scaled_gif];\
[0][scaled_gif]overlay=50:30:shortest=1" \
-codec:a copy output.mp4


  


  UPDATE #1

  


  I managed to get closer to my goal with this command :

  


  ffmpeg -y -i input.mp4 -loop 1 -i mask.png \ 
-filter_complex "[1:v]alphaextract[mask]; \
movie=animation.gif,scale=1920x1080[scaled_gif]; \
[scaled_gif][mask]alphamerge[masked]; \
[0:v][masked]overlay=0:0" \
-c:a copy output_masked.mp4


  


  but it has 2 problems :

  


  

  1. GIF loses it's transparency. Transparent pixels become white.

  


  2. GIF plays only once (i.e. no loop)

  


  


  Output : https://file.re/2021/03/11/outputmasked/

  


• png : Set the color range as full range

  8 mai 2015, par wm4

  png : Set the color range as full range
  The format uses full range for the gray formats.
  CC : libav-stable@libav.org
  

  • [DBH] libavcodec/pngdec.c

• UnsatisfiedLinkError for armeabi with Android Studio on Ubuntu but with Android Studio on Windows it works

  14 juillet 2015, par dddog

  I’m working at an Android app that uses ffmpeg-android-arm.jar who contains native libs for video/audio encoding.
  My native libs are included in the project by copying the ffmpeg-android-arm.jar in the app/libs folder. ffmpeg-android-arm.jar is just an archive having the following folder structure lib/armeabi/ and in the armeabi folder being all the native libs as .so files.

  Building the apk using Android Studio on Windows 8 works just fine, the statement bellow, being the first that wants to load a native library working well.

  //neon library optimized for opencv
  
  static {
  
      Log.d(TAG, "about to load library checkneon...");
  
      try {
  
          System.loadLibrary("checkneon");
  
      } catch (Exception e) {
  
          e.printStackTrace();
  
      } catch (Error error) {
  
          error.printStackTrace(System.out);
  
      }
  
      Log.d(TAG, "library checkneon loaded!");
  
  }

  Going on Android Studio running on Ubuntu 14.04.02, I’m unable to make my project run, as I keep receiving java.lang.UnsatisfiedLinkError. See the stack trace bellow :

  07-14 20:41:05.616  17018-17018/? D/dalvikvm﹕ Late-enabling CheckJNI
  
  07-14 20:41:05.786  17018-17018/org.myfrogvrvp8 D/RecordActivity﹕ about to load library checkneon...
  
  07-14 20:41:05.786  17018-17018/org.myfrogvrvp8 I/System.out﹕ java.lang.UnsatisfiedLinkError: Couldn't load checkneon from loader dalvik.system.PathClassLoader[dexPath=/data/app/org.myfrogvrvp8-2.apk,libraryPath=/data/app-lib/org.myfrogvrvp8-2]: findLibrary returned null
  
  07-14 20:41:05.791  17018-17018/org.myfrogvrvp8 I/System.out﹕ at java.lang.Runtime.loadLibrary(Runtime.java:355)
  
  07-14 20:41:05.791  17018-17018/org.myfrogvrvp8 I/System.out﹕ at java.lang.System.loadLibrary(System.java:525)
  
  07-14 20:41:05.791  17018-17018/org.myfrogvrvp8 I/System.out﹕ at org.myfrogvrvp8.FFmpegRecorderActivity.<clinit>(FFmpegRecorderActivity.java:189)
  
  07-14 20:41:05.791  17018-17018/org.myfrogvrvp8 I/System.out﹕ at java.lang.Class.newInstanceImpl(Native Method)
  
  07-14 20:41:05.791  17018-17018/org.myfrogvrvp8 I/System.out﹕ at java.lang.Class.newInstance(Class.java:1130)
  
  07-14 20:41:05.791  17018-17018/org.myfrogvrvp8 I/System.out﹕ at android.app.Instrumentation.newActivity(Instrumentation.java:1078)
  
  07-14 20:41:05.791  17018-17018/org.myfrogvrvp8 I/System.out﹕ at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2210)
  
  07-14 20:41:05.791  17018-17018/org.myfrogvrvp8 I/System.out﹕ at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2349)
  
  07-14 20:41:05.791  17018-17018/org.myfrogvrvp8 I/System.out﹕ at android.app.ActivityThread.access$700(ActivityThread.java:159)
  
  07-14 20:41:05.791  17018-17018/org.myfrogvrvp8 I/System.out﹕ at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1316)
  
  07-14 20:41:05.791  17018-17018/org.myfrogvrvp8 I/System.out﹕ at android.os.Handler.dispatchMessage(Handler.java:99)
  
  07-14 20:41:05.791  17018-17018/org.myfrogvrvp8 I/System.out﹕ at android.os.Looper.loop(Looper.java:176)
  
  07-14 20:41:05.791  17018-17018/org.myfrogvrvp8 I/System.out﹕ at android.app.ActivityThread.main(ActivityThread.java:5419)
  
  07-14 20:41:05.791  17018-17018/org.myfrogvrvp8 I/System.out﹕ at java.lang.reflect.Method.invokeNative(Native Method)
  
  07-14 20:41:05.791  17018-17018/org.myfrogvrvp8 I/System.out﹕ at java.lang.reflect.Method.invoke(Method.java:525)
  
  07-14 20:41:05.796  17018-17018/org.myfrogvrvp8 I/System.out﹕ at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1046)
  
  07-14 20:41:05.796  17018-17018/org.myfrogvrvp8 I/System.out﹕ at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:862)
  
  07-14 20:41:05.796  17018-17018/org.myfrogvrvp8 I/System.out﹕ at dalvik.system.NativeStart.main(Native Method)
  
  </clinit>

  I’ve checked both apks, and they both have the native .so files included in the lib/armeabi folder.

  I’m quite puzzled...
  Any help much appreciated !