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• Recording Audio on website : Red5 stream or posting the audio data ?

  7 septembre 2011, par 8vius

  Let me first establish what I want to do :

  My user is able to record voicenotes on my website, add tags to said notes for indexing as well as a title. When the note is saved I save the path of the note along with the other info in my DB.

  Now, I have 2 choices to do the recording, both involve a .swf embedded in my site :

  1) I could use Red5 server to stream the audio to my server and save the file and return the path to said file to my app to do the DB saving, seems rather complicated since I would have to convert the audio and move it to the appropriate folder that belongs to the user in a server side Red5 app, which I'm not very aware of how to build.

  2) I could simply record the audio and grab its byte array, do a Base64 encoding on it and send it to PHP along with the rest of the data that is necessary (be it by a simple POST or an AJAX call), decode it on the server and make the file with the appropriate extension, audio conversion would also occur here using ffmpeg, this option seems simpler but I do not know how viable it is.

  What option would you say is more viable and easier to develop ? Thanks in advance

• Recording a mp3 stream with FFMPEG and drop-outs

  14 mars 2013, par Rob Oliver

  I hope someone can give me pointer, I have a php script that runs the command below to record an live radio mp3 stream to create hour long mp3 recordings. It works very well for my purpose. The only issue is occasionally no recording is made. As far as I can tell its because the stream has dropped out and ffmpeg just aborts.

  /usr/local/bin/ffmpeg -i http://www.mystream.com:8000/radiostream.mp3 -t 60:00 -acodec copy /var/www/mydomain/audio/".$recorded_audio_title;

  So my question, is there anyway to tell ffmpeg to continuously record for the 60:00 minutes to make a recording even if their are drop outs ? I'd be happy with a odd bit of silence providing it completed the recording.

  I hope this makes sense and I'd appreciate even a pointer to a FFMPEG option or flag. Having Google'd I havnt seen anything that would fit the bill.

  Many thanks in advance

  rob

• Encoding Raw PCM data to AAC using ffmpeg in Android

  10 janvier 2012, par NISHAnT

  Now, i m using libfaac directly to convert raw PCM data to AAC in JNI. Frames Encoded successfully still bytesWritten is always 0 it means there will b some problem in code Here is my Code.

  JNIEXPORT
  
  jbyteArray JNICALL Java_com_encodePCMFrame(JNIEnv * env,
  
      jclass clazz,short* data,jint bitRate,jint sampleSize,jint channelConfig)
  
  {
  
  
  
  
  
    faacEncHandle hEncoder;
  
      unsigned long samplesInput, maxBytesOutput, totalBytesWritten;
  
      faacEncConfigurationPtr faacPtr;
  
      char *faac_id_string;
  
      char *faac_copyright_string;
  
      unsigned long inputsamples;
  
      unsigned long maxoutputbytes;
  
      unsigned char* bitbuf;
  
      int bytesWritten;
  
      jbyteArray AACframe;
  
      jsize size;
  
  
  
  
  
      if(faacEncGetVersion(&faac_id_string, &faac_copyright_string) == FAAC_CFG_VERSION)
  
      {
  
        __android_log_print(ANDROID_LOG_VERBOSE, APPNAME, "\nFAAC_ID_STRING %s\n\n ", faac_id_string);
  
      }
  
  
  
  
  
      hEncoder = faacEncOpen(sampleSize, channelConfig,&inputsamples, &maxoutputbytes);
  
  
  
      if(hEncoder)
  
      {
  
         __android_log_print(ANDROID_LOG_VERBOSE, APPNAME, "AAC Codec Open (samplesize = %d)\n (channelConfig = %d)\n (input Samples = %d)\n(Max OUTPUT BYTES = %d)\n (bitRate = %d)...",sampleSize,channelConfig,inputsamples,maxoutputbytes,bitRate);
  
      }
  
  
  
  
  
      faacPtr = faacEncGetCurrentConfiguration(hEncoder);
  
  
  
      faacPtr->aacObjectType = MAIN;
  
      faacPtr->mpegVersion = MPEG2;
  
      faacPtr->outputFormat = 1; //ADTS
  
      faacPtr->bitRate = bitRate;
  
      faacPtr->inputFormat = FAAC_INPUT_16BIT;
  
  
  
  
  
  
  
      if (faacEncSetConfiguration(hEncoder, faacPtr)==0)
  
      {
  
           __android_log_print(ANDROID_LOG_VERBOSE, APPNAME,"fail to set");
  
           faacEncClose ( hEncoder );
  
           hEncoder =0;
  
      }
  
  
  
  
  
  
  
          bitbuf = (unsigned char*)malloc(maxoutputbytes*sizeof(unsigned char));
  
  
  
         bytesWritten = faacEncEncode(hEncoder,(int32_t *)data,inputsamples,bitbuf,maxoutputbytes);
  
  
  
  
  
      if(bytesWritten<=0)
  
      {
  
              __android_log_print(ANDROID_LOG_VERBOSE, APPNAME, "Can Not Encode Frame... bytesWritten = %d ",bytesWritten);
  
              faacEncClose(hEncoder);
  
      }
  
      else
  
      {
  
             __android_log_print(ANDROID_LOG_VERBOSE, APPNAME, "Bytes Written = %d ",bytesWritten);
  
  
  
             __android_log_print(ANDROID_LOG_VERBOSE, APPNAME, "Encoding frame %d ",bitbuf);
  
      }
  
  
  
  
  
      AACframe = (*env)->NewByteArray(env,maxoutputbytes);
  
  
  
      (*env)->SetByteArrayRegion(env,AACframe, 0,maxoutputbytes, bitbuf);
  
  
  
      __android_log_print(ANDROID_LOG_VERBOSE, APPNAME, "Buffer AAC Frame == %d    Allocated...  Size == %d ",AACframe,maxoutputbytes);
  
  
  
  
  
      return AACframe;
  
  
  
      av_free(bitbuf);
  
      av_free(data);
  
      (*env)->ReleaseByteArrayElements(env, AACframe, 0, JNI_ABORT);
  
  
  
   }

  Thanks in Advance.