FFMPEG encodin audio from PCM to AAC in C++

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Hi There

I am looking for some code that will allow me to to convert PM audio to AAC. I have written an attempt at it but I keep getting error -22 when trying to do the econding. Code is written below.

Any help would be greatly appreciated!

C++

while( res = av_read_frame( pFormatCtx, &packet ) >=0 )
{
   if ( packet.stream_index == audioStream )
   {
  avcodec_get_frame_defaults(pFrame);
      ret = avcodec_decode_audio4(dec_ctx, pFrame, &got_frame, &packet);

      if (ret < 0) 
      {
     return ret;
  }

      /* Set frame pts */
      pFrame->pts = av_frame_get_best_effort_timestamp(pFrame);

      if (got_frame) 
      {

         AVPacket audioEncodedPacket;
         av_init_packet(&audioEncodedPacket);


         ret = avcodec_encode_audio2(out_fmt_ctx->streams[0]->codec, 
                                     &audioEncodedPacket, 
                                     pFrame, &got_packet);

         if ( ret < 0 )
         {
            //THIS IS WHERE I AM GOING WITH ERROR -22
         }
      }
 ...... // more code
 }

Posted 17-Jun-14 5:06am

godspeed123

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Sergey Alexandrovich Kryukov · Answer 1 · 2014-06-17T07:13:00

I have one specific advice for you: build the utility ffmpeg.exe and give it the command-line arguments like

ffmpeg -i someInputFile.wav outputFile.aac

Run it under the debugger and see what happens. This is a great library and utility, but it's very big and have some legacy "noise" in it, due to multiple patches and updates. Maybe there are some error conditions which are simply ignored, or just the warning is issued and the condition itself is unavoidable or depends on input, something like that.

—SA

KarstenK · Answer 2 · 2014-06-17T06:36:00

Solution 1

you have better chances by searching ffmpeg contacts direct.

Looks like here is some sample code available.

Posted 17-Jun-14 6:36am

KarstenK