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• Play mp3 data with audiotrack with ffmpeg

  1er février 2014, par Ichigo Kurosaki

  I am designing an android app where i receive live mp3 data as stream from Red5 server and i need to play it.

  I cant play it using media player class as i don't have any url for the stream, nor i cant use files. Another option is to use Audio track class, but requires PCM data only. So need to convert mp3 to pcm, so using ffmpeg.

  My code for conversion is

  AVCodec *codec;
  
  AVCodecContext *c= NULL;
  
  int out_size, len;
  
  uint8_t *outbuf;
  
  
  
  int iplen=(*env)->GetArrayLength(env, mp3buf);
  
  int16_t inbuf[AUDIO_INBUF_SIZE + FF_INPUT_BUFFER_PADDING_SIZE];
  
  AVPacket avpkt;
  
  av_init_packet(&avpkt);
  
  av_register_all();
  
  avcodec_register_all();
  
  
  
  codec = avcodec_find_decoder(CODEC_ID_MP3);
  
  if(!codec){
  
      __android_log_print(ANDROID_LOG_DEBUG, "logfromjni", "Codec not found");
  
  }
  
  c = avcodec_alloc_context();
  
  outbuf = malloc(AVCODEC_MAX_AUDIO_FRAME_SIZE);
  
  avpkt.data = (*env)->GetByteArrayElements(env,mp3buf,NULL);
  
  
  
  avpkt.size = (*env)->GetArrayLength(env, mp3buf);
  
  out_size = AVCODEC_MAX_AUDIO_FRAME_SIZE;
  
  int ao=avcodec_open(c, codec);
  
      if (ao < 0) {
  
          __android_log_print(ANDROID_LOG_DEBUG, "logfromjni", "avcodec not open");
  
      }
  
      len = avcodec_decode_audio3(c, (short *)outbuf, &out_size, &avpkt);

  The Problem is avcodec_decode_audio3(c, (short *)outbuf, &out_size, &avpkt); returns -1 always.

  Cant figure out whats wrong.

  Any help appreciated.

• Why does this HEVC HLS stream not play on browsers ?

  22 janvier 2024, par Sebastian

  I have a HEVC HLS stream that does not play when I paste it e.g. in Safari. The video is encoded in HEVC and has a resolution of 4608x1728. The screen just stays black.

  


  The URL is : https://cdn2.taggy.cam/videos/JFNi2a3JVxmUxWh8t6YkbzR5t9HyS94ZaQy81KVrbwJ2ztTp9f/hls/h265/video.m3u8

  


  (or https://cdn2.taggy.cam/videos/JFNi2a3JVxmUxWh8t6YkbzR5t9HyS94ZaQy81KVrbwJ2ztTp9f/hls/h265/playlist.m3u8 for the master playlist)

  


  VLC player does play it.

  


  I tried several different players to get an error message, but the only thing I got was "MEDIA.VIDEO_ERROR (4,,CHUNK_DEMUXER_ERROR_APPEND_FAILED : Video stream codec hevc doesn't match SourceBuffer codecs.)"

  


  The video is initially created with FFMpeg by recording the RTSP stream of a webcam with

  


  ffmpeg -i rtsp://stream -tag:v hvc1 -f hls -hls_time 1 -hls_list_size 0 -hls_segment_filename output-directory/video-%05d.m4s -c copy


  


  Any ideas how to debug this would be appreciated !

  


  Thanks,
Sebastian

  


• Discord bot play youtoube link

  26 février 2019, par RedGaming

  Im coding a discord bot, i installed ytdl and ffmpeg, both correctly (cmd shows version), but it quite dont plays the yt links, this is the code :
  } else if (message.content.startsWith ===$prefixplay`)
  const ytdl = require(’ytdl-core’) ;
  const streamOptions =
  seek : 0,
  volume : 1
   ;
  const broadcast = bot.createVoiceBroadcast() ;
  var link = arg1

      bot.voiceChannel.join()
  
          .then(connection => {
  
              const stream = ytdl(arg1, {
  
                  filter: 'audioonly'
  
              });
  
              broadcast.playStream(stream);
  
              const dispatcher = connection.playBroadcast(broadcast);
  
          })
  
          .catch(console.error);