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• Multiples Cameras Rttsp to HLS [closed]

  15 mai 2024, par Dark Dragon

  Is it possible to create a media server that will have just one endpoint that will receive several requests with camera protocols, and this server must return the stream from these cameras formatted ?
Knowing that the front end will take these camera streams and place them in the browser

  


  I Still searching about the subject

  


• flac : Fix channel order for mono files.

  28 juin 2014, par Erik de Castro Lopo

  flac : Fix channel order for mono files.
  * The default channel mask for mono files was 0x0001 (front left) but it
  
    makes more sense to use 0x0004 (front center) for such files.
  * Also FLAC will accept not only mono WAV files with 0x0001 mask, but also
  
    with 0x0002 (requested at https://sourceforge.net/p/flac/bugs/390/)
  
    and 0x0004 (e.g. SoX creates mono files with this mask).
  * The comment about channel support was updated.
  * The error message
  
       "Use —channel-map=none option to store channels in current order ; FLAC files
  
       must also be decoded with —channel-map=none to restore correct order."
  
    is misleading : FLAC never changes the order of channels.
  
    Decoding with this options also sets the channel mask of the resulting WAV
  
    file to 0. Without this option the mask is equal to the value of
  
    WAVEFORMATEXTENSIBLE_CHANNEL_MASK tag.
  Patch-from : lvqcl <lvqcl.mail@gmail.com>
  

  • [DH] src/flac/decode.c
  • [DH] src/flac/encode.c

• FFMPEG memory leak on FLV video frame decoding

  10 août 2014, par Michael IV

  I am decoding FLV video on Windows using FFMPEG latest dev version(20140810) .Monitoring memory consumption of my program process I found the memory footprint constantly increasing.I do packet deallocation and also tried to delete and then reallocate the AVFrame anew on each decode.But it doesn’t help.I read on some threads people pointing out there is an internal memory leak in H264 decoder but I have seen no official confirmation of it nor any solution.
  Here is how I decode a frame :

  AVPacket packet;
  
  av_read_frame(_ifmt_ctx, &packet);
  
  
  
  if (packet.stream_index == _in_video_stream->index) 
  
  {
  
      int isGotVideoFrame = 0;
  
  
  
      // Decode video frame
  
      ret = avcodec_decode_video2(_dec_in_video_ctx, _src_video_frame,
  
                     &isGotVideoFrame, &packet);
  
  
  
      if (1 == isGotVideoFrame) 
  
      {
  
          sws_scale(_sws_ctx, (const uint8_t * const*) _src_video_frame->data,
  
                    _src_video_frame->linesize, 0,_inVideoHeight, 
  
                    _dst_video_frame->data, _dst_video_frame->linesize);
  
  
  
          uint8_t* dest = new uint8_t[_numBytes];
  
          memcpy(dest, _dst_video_frame->data[0], _numBytes);
  
  
  
          av_free_packet(&packet);
  
          _frames_cache.push_back(dest);
  
      }
  
  
  
      av_frame_unref(_src_video_frame);
  
      av_frame_free(&_src_video_frame);
  
      _src_video_frame = av_frame_alloc();
  
  }

  Then in another place on each frame I delete ’dest’ from the vector :

      uint8_t * fr = _frames_cache.front();
  
      _frames_cache.erase(_frames_cache.begin());
  
      delete [] fr ;