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• Convert video with FFMPEG Library in android

  27 septembre 2012, par Sanat Pandey

  I have a problem that I received a video foile from the server which can not be played throgh video view from the app I am making. I don't know what the actaul problem is because all videos are played through same video view but the video received from the server side is not played. So, I think that I have to integrate FFMPEG in our android app, so I can play every video at a runtime conversion. For this I have read much more about FFMPEG Library integration with android through many sites as :

  http://www.roman10.net/how-to-build-android-applications-based-on-ffmpeg-by-an-example/

  Downloaded some projects from GitHUb (https://github.com/appunite/AndroidFFmpeg) but unable to succeed for building the Library through NDK. Some thing I missed and I am working on Windows machine, probably this might be a problem. I want the exact solution regarding this, means step by step solution for building the android project with FFMPEG Library. If you have some useful suggestion then please share with me.

  Thanks in advance.

• FFmpeg.AutoGen C# library Can't open Codec G726

  8 septembre 2024, par Rushdi Eskandar

  I am stuck with FFmpeg.AutoGen G726 Audio codec, it always shows error invalid argument.
Note that I Tried other codecs such as G722, G711 and it is working fine except for G726 codec. I also confirm that my binaries does support G726 codec using this command ffmpeg -formats. Please tell me what could be the reason, and if you know any other library for decoding G726 that would be better

  


  public unsafe class AudioDecoder : IDisposable
 {
   private AVCodecContext* _codecContext;
   private AVCodec* _codec;
   private AVFrame* _frame;
   private AVPacket* _packet;

   public AudioDecoder()
   {
       // Find the G726 decoder
       _codec = ffmpeg.avcodec_find_decoder(AVCodecID.AV_CODEC_ID_ADPCM_G726);
       if (_codec == null)
       {
           throw new Exception("G726 codec not found.");
       }

       // Allocate codec context
       _codecContext = ffmpeg.avcodec_alloc_context3(_codec);
       if (_codecContext == null)
       {
           throw new Exception("Failed to allocate codec context.");
       }

       // Print supported sample formats
       Console.WriteLine("Supported sample formats for G726 codec:");
       AVSampleFormat* sample_fmts = _codec->sample_fmts;
       if (sample_fmts != null)
       {
           while (*sample_fmts != AVSampleFormat.AV_SAMPLE_FMT_NONE)
           {
               Console.WriteLine($"Sample format: {*sample_fmts}");
               sample_fmts++;
           }
       }

       // Set codec parameters
       _codecContext->sample_rate = 8000;  // G726 typically uses 8000Hz
       if (_codec->sample_fmts != null)
       {
           _codecContext->sample_fmt = *_codec->sample_fmts;  // Use the first supported sample format
       }
       else
       {
           _codecContext->sample_fmt = AVSampleFormat.AV_SAMPLE_FMT_S16;  // Fallback to a common format
       }
       _codecContext->bit_rate = 32000;  // Example bitrate for G726

       // Attempt to open the codec with detailed error logging
       int ret = ffmpeg.avcodec_open2(_codecContext, _codec, null);
       if (ret < 0)
       {
           byte[] errBuf = new byte[1024];
           fixed (byte* errPtr = errBuf)
           {
               ffmpeg.av_strerror(ret, errPtr, (ulong)errBuf.Length);
           }
           string errMessage = System.Text.Encoding.UTF8.GetString(errBuf);
           throw new Exception($"Failed to open codec (Error code: {ret}): {errMessage}");
       }

       // Allocate packet and frame
       _packet = ffmpeg.av_packet_alloc();
       _frame = ffmpeg.av_frame_alloc();
       if (_packet == null || _frame == null)
       {
           throw new Exception("Failed to allocate packet or frame.");
       }
   }
}


  


• Evolution #3096 (Nouveau) : fichier lang public/privé sur les plugins

  15 novembre 2013, par Fabrice Véronneau

  Il semblerait qu’il ne soit pas possible de surcharger la langue d’un plugin sur la partie publique sans interférer sur la partie privée.
  Une surcharge potentielle pourrait être intéressante du type :
  public_prefixplugin_fr.php
  ou
  ecrire_prefixplugin_fr.php
  surchargeant :
  prefixeplugin.fr