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• Decoding AAC audio stream coming from red5 server with javacv-ffmpeg on Android

  21 décembre 2016, par Ichigo Kurosaki

  I am trying to play AAC audio live stream coming from Red5 server, so to decode the audio data i am using Javacv-ffmpeg. Data is received as packets of byte[]
  Here is what i tried

  public Frame decodeAudio(byte[] adata,long timestamp){
  
      BytePointer audio_data = new BytePointer(adata);
  
      avcodec.AVCodec codec1 = avcodec.avcodec_find_decoder(avcodec.AV_CODEC_ID_AAC);// For AAC 
  
      if (codec1 == null) {
  
      Log.d("showit","avcodec_find_decoder() error: Unsupported audio format or codec not found: " +  audio_c.codec_id() + ".");
  
      }
  
      audio_c = null;
  
  
  
      audio_c = avcodec.avcodec_alloc_context3(codec1);
  
      audio_c.sample_rate(44100);
  
      audio_c.sample_fmt(3);
  
      audio_c.bits_per_raw_sample(16);
  
      audio_c.channels(1);
  
      if ((ret = avcodec.avcodec_open2( audio_c, codec1, (PointerPointer)null)) < 0) {
  
      Log.d("showit","avcodec_open2() error " + ret + ": Could not open audio codec.");
  
      }
  
  
  
     if (( samples_frame = avcodec.avcodec_alloc_frame()) == null)
  
      Log.d("showit","avcodec_alloc_frame() error: Could not allocate audio frame.");
  
  
  
     avcodec.av_init_packet(pkt2);
  
  
  
     samples_frame = avcodec.avcodec_alloc_frame();
  
     avcodec.av_init_packet(pkt2);
  
     pkt2.data(audio_data);
  
     pkt2.size(audio_data.capacity());
  
     pkt2.pts(timestamp);
  
     pkt2.pos(0);
  
  
  
     int len = avcodec.avcodec_decode_audio4( audio_c,  samples_frame,  got_frame,  pkt2);
  
  }  

  But len after decoding returns -1 for first frame and then -22 always.
  First packet is like this always

  AF 00 12 08 56 E5 00

  Further packets are like

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

  Couldn’t figure out where is the problem, whether in setting the AVcodec context audio_c or setting packet for decoder.

  Any help appreciated. Thanks in advance.

• IP camera livestream on server

  1er juillet 2015, par kunsti

  i have written an ASP.NET MVC Application.
  On the website is there are some ipcameras streams.
  They are inbounded with an image tag

  <img height='169' width='300' style='border:1px solid' src="http://xx.xx.xx.xxx/nphMotionJpeg?Resolution=320x180&amp;Quality=Standard" alt="Kamerastream" />

  Because of some changes of the accesslist it is not possibile for some users to see these streams anymore.

  The Windows server (a virtual machine) can proceed to this camera streams.
  The users which are not able to see the streams can reach the server.
  So my idea was to provide the stream by server instead of front end.
  I tried to do it via iis live smooth streaming.

  But I wasn’t able to find an introduction which I was able to understand.
  The one I unterstand is with Expression Encoder pro, which is not available for download anymore.

  I have also found FFMPEG but I do not no how tow ork with it.
  Is anyone out there who could explain it to me, knows a good tutorial or knows a better way to do what I want.

• http: never send ’Cookie : (null)’ to the server

  21 mars 2014, par wm4

  http: never send ’Cookie : (null)’ to the server
  If a domain has some cookies set, but matching the cookie fails due to
  
  the port being different, get_cookies() succeeds, but sets cookies to
  
  NULL. The caller of get_cookies() didn’t check for the NULL value.
  This also avoids passing NULL to libc string functions, which is
  
  undefined behavior
  Fixes Ticket2180
  Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] libavformat/http.c