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• How can I find out what this ffmpeg error code means ?

  27 septembre 2018, par Asik

  I’m using the function avcodec_decode_video2. On an encoding change in the stream, it returns -1094995529. The documentation only states :

  On error a negative value is returned, otherwise the number of bytes
  used or zero if no frame could be decompressed.

  But there doesn’t seem to be an enum of return codes or any other form of documentation. What does the error mean and how can I determine that in general ?

• WMA decoding with ffmpeg failed

  24 novembre 2011, par Ali

  I have problem in decoding WMA/WMAPRO stream with ffmpeg.i have filled extra data from the coming stream.I am able to get bit rate, sample rate, extradata size and other parameters so there is no problem with the codecCtx initilization.

  avcodec_open(codecCtx, codec);

  returns -1

  Anyone help me !

• FFmpeg. avcodec_find_encoder(AV_CODEC_ID_H264) return false

  14 juillet 2016, par Иван Чванов

  The problem : I can not connect the h264 codec for encoding and decoding of frames.

  ---

  Description :

  I downloaded from here ffmpeg library https://ffmpeg.zeranoe.com/builds/, version dev.

  Connect it to your project QT :

  extern "C"
  
  {
  
      #include 
  
      #include 
  
      #include 
  
      #include 
  
      #include 
  
  }
  
      
  
  #pragma comment (lib, "avcodec.lib")
  
  #pragma comment (lib, "avformat.lib")
  
  #pragma comment (lib, "swscale.lib")
  
  #pragma comment (lib, "avutil.lib")

  Next prescribe av_register_all(); to include all codecs.

  Next, call the function : avcodec_find_encoder(AV_CODEC_ID_H264), returns false.

  In the ReadMe file, the library said that it was collected with —enable-libx264 and —enable-gpl compile the keys including h264 codec that is supposed to be.

  If the call : avcodec_find_encoder(AV_CODEC_ID_MPEG1VIDEO), it returns an object AVCodec, as it should.

  I use the MinGW compiler. OC Windows 7.

  How can I resolve or work around the problem ? Compile the library itself has not yet obtained. I understand you to connect sources and "poking" them, that too is meaningless.

  ---

  ** Once again, I will describe my problem : **

  I need to encode the codec h264 (can VP9) individual frames in one program, and then decode them in another program. You can use other libraries. The language C ++. It is necessary to use interframe compression codec, rather than simply pressed apart frames.

  Sorry for my english.

  Ideas. Advice. Suggestions.