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• Decode opus audio using ffmpeg lib not giving proper audio

  31 octobre 2018, par Harshpal Gosavi

  This is my code in this code all data is printing correct and there is no error but its not playing correctly. I am getting audio like radio voice. Human voice is not audible as it is continuosly playing radio like sound. I am not sure whether all values are correct or not. But if I change it then it wont work. Please help me how can I get proper audio voice.

  Opus.cpp

   {   void Opus::Decode1_working(int8_t *inBuf, int inLen , int16_t *outBuf, int *decodedLen)
  
  {
  
  
  
  
  
   AVPacket avpkt;
  
   AVFrame *decoded_frame = NULL;
  
  
  
   av_init_packet(&avpkt);
  
   avpkt.data = (uint8_t*)inBuf;
  
   avpkt.size = inLen;
  
  
  
  
  
   decoded_frame = av_frame_alloc();
  
   av_frame_unref(decoded_frame);
  
  int len = avcodec_send_packet(c, &avpkt);
  
   if (len < 0)
  
   {
  
        //Error
  
        return;
  
   }
  
   else
  
   {
  
       int retval = avcodec_receive_frame(c, decoded_frame);
  
       if(retval >= 0)
  
       {
  
           const AVCodecDescriptor *codesc = avcodec_descriptor_get(c->codec_id);
  
  
  
           int planeSize;
  
           int data_size = av_samples_get_buffer_size
  
                           (&planeSize,
  
                            c->channels,
  
                            decoded_frame->nb_samples,
  
                            c->sample_fmt,
  
                            1);
  
  
  
           if(data_size < AUDIO_MAXBUF_SIZE)
  
           {
  
               memcpy(outBuf, decoded_frame->data[0], (data_size));// * sizeof(uint8_t)));
  
               *decodedLen = data_size;
  
           }
  
           else
  
           {
  
              //Not copied
  
          }
  
  
  
       }
  
  
  
   }
  
   av_frame_free(&decoded_frame);
  
  }
  
  
  
  int Opus::init(void *args) {
  
  
  
  i_sampleRate = 0;
  
  i_channels = 0;
  
  
  
  avcodec_register_all();
  
  codec = avcodec_find_decoder(AV_CODEC_ID_OPUS);
  
   if(codec ==NULL)
  
   {
  
      //Codec not open
  
   }
  
  
  
  c= avcodec_alloc_context3(codec);
  
  
  
   c->sample_rate = 48000;
  
   c->channels = 1;
  
   c->bit_rate = 48000;
  
  
  
  
  
      av_opt_set_int(c, "refcounted_frames", 1, 0);
  
      int codecOpen = 0;
  
       codecOpen = avcodec_open2(c, codec,NULL);//,&audioOptionsDict) ;
  
       if (codecOpen < 0)
  
       {
  
           //return error;
  
       }
  
  
  
  return 0;
  
  }
  
  
  
  int Opus::decode(Packet *packet) {
  
  
  
  int8_t *data = new int8_t[packet->size];
  
   memcpy(data, packet->data, (packet->size * sizeof(int8_t)));
  
  
  
  long length = packet->size;
  
  
  
  int16_t *pcmdata = new int16_t[AUDIO_MAXBUF_SIZE];//[outLen];
  
  
  
  i_sampleRate = 48000;
  
  i_channels = 1;
  
  
  
  int decodedLen = 0;
  
  Decode1_working(data,length,pcmdata, &decodedLen);
  
  
  
  if (p_callback)
  
  {
  
      ++i_framesDecoded;
  
      p_callback->AfterAudioDecode((u8*)pcmdata,
  
                                   //length * sizeof(u8),
  
                                    decodedLen,//* sizeof(u8),
  
                                   packet->pts);
  
  }
  
  return 1;
  
  }
  
  
  
  }

• Restream m3u8 using ffmpeg to rtmp but just audio

  6 juin 2021, par raisedhand

  I'm trying to re-stream m3u8 link to rtmp but just need to get audio in output without video.

  


  below code worked fine for restream m3u8 to rtmp but can't just get audio in output.

  


  CMD ffmpeg -re -i http://127.0.0.1:8080/stream.m3u8 -c:v copy -c:a aac -ar 44100 -ab 128k -ac 2 -strict -2 -flags +global_header -bsf:a aac_adtstoasc -bufsize 3000k -f flv rtmp :...

  


  My question is how to re-stream m3u8 to rtmp but just audio like radio station.

  


• ffmpeg won't livestream to youtube

  4 novembre 2019, par HeyItsDan

  I’m trying to write a simple "script" that allows me to stream a music radio to YouTube or any other platform but whenever I’m trying to test it, it won’t let me livestream at all, if anyone got a solution to this it would be very appreciated !

  StreamURL="xxxxxxxxxxxxxxxxxxxx"
  
  Key="xxxxxxxxxxxxxxxxxxxxxxxx"
  
  BackgroundPath="bg.jpg"
  
  NPPath="np.txt"
  
  
  
  ffmpeg \
  
  -re \
  
  -loop 1 \
  
  -framerate $FPS \
  
  -i $BackgroundPath \
  
  -s 1920x1080 \
  
  -ab 128k \
  
  -maxrate 2048k \
  
  -bufsize 2048k \
  
  -vf "drawbox=0:0:1920:100:black:fill, drawtext='fontfile=Arial\:style=Bold Italic:text=Now Playing':fontcolor=white:fontsize=35:x=20:y=20, drawtext=textfile='$NPPath':fontcolor=white:fontsize=28:x=20:y=58" \
  
  -c:a aac \
  
  -f flv $StreamURL$Key```