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• Catch "Unfortunately 'app' has stopped working" Error

  2 juillet 2015, par cadesalaberry

  I am using a very unstable library on Android that crashes sporadically. I start it using the startActivity() in my code.

  The unstable part of the code is doing a lot of video processing and uploading the result to a server. I do not really mind if the activity crashes, but I need to signal the server that it did.

  The crash comes from a memory leak (no time to solve it yet). Is there a way I can catch the error a display a more friendly/funny message instead ?

  try {
  
      context.startActivity(intent);
  
  } catch (ApplicationCrashedException e) {
  
      server.notifyServerOfCrash();
  
      toast("I really disliked your face...");
  
  }

  Edit : Here is the Error :

  java.lang.OutOfMemoryError
  
    at dalvik.system.VMRuntime.newNonMovableArray(Native Method)
  
    at java.nio.MemoryBlock.allocate(MemoryBlock.java:125)
  
    at java.nio.ByteBuffer.allocateDirect(ByteBuffer.java:72)
  
    at io.cine.android.streaming.FFmpegMuxer.writeSampleData(FFmpegMuxer.java:151)
  
    at io.cine.android.streaming.AndroidEncoder.drainEncoder(AndroidEncoder.java:128)
  
    at io.cine.android.streaming.TextureMovieEncoder.handleFrameAvailable(TextureMovieEncoder.java:264)
  
    at io.cine.android.streaming.TextureMovieEncoder$EncoderHandler.handleMessage(TextureMovieEncoder.java:409)
  
    at android.os.Handler.dispatchMessage(Handler.java:102)
  
    at android.os.Looper.loop(Looper.java:136)
  
    at io.cine.android.streaming.TextureMovieEncoder.run(TextureMovieEncoder.java:219)
  
    at java.lang.Thread.run(Thread.java:841)

  For some reason once the BroadcastActivity runs out of memory, the Activity gets killed and comes back to the previous one. It then displays the ’app’ has stopped working Dialog. If I press OK, it kills the entire application and comes back to the home screen.

  Ideally I would just have it come back to the previous activity notifying the server silently. (Not killing the application)

• Revert "avcodec/decode : copy the output parameters from the last bsf in the chain...

  12 septembre 2018, par James Almer

  Revert "avcodec/decode : copy the output parameters from the last bsf in the chain back to the AVCodecContext"
  This reverts commit f631c328e680a3dd491936b92f69970c20cdcfc7.
  The avcodec_parameters_to_context() call was freeing and reallocating
  
  AVCodecContext->extradata, essentially taking ownership of it, which according
  
  to the doxy is user owned. This is an API break and has produced crashes in
  
  some library users like Firefox[1].
  Revert until a better solution is found to internally propagate the filtered
  
  extradata back into the decoder context, or a decision is made to change the
  
  API.
  [1] https://bugzilla.mozilla.org/show_bug.cgi?id=1486080
  Signed-off-by : James Almer <jamrial@gmail.com>
  

  • [DH] libavcodec/decode.c

• How to output raw frequency (fft) data using ffmpeg / libavfilter

  12 janvier 2020, par Jeroen

  I’m trying to write libavfilter bindings to convert an arbitrary audio file into a raw frequency (spectrum) data to do subsequent audio analysis. Is there anything built-in ffmpeg or libavfilter to output binary frequency data, rather than a proper audio/video file ?

  FFmpeg has a few built-in filters that perform an FFT such as afftfilt and showfreqs, however these filters always convert output back to video or audio. What I need is something like the afftfilt filter, but which dumps the raw FFT data, rather than recode it back to PCM.