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• How to convert an URL S3 picture to video

  21 octobre 2018, par Dannick Montanede

  I have some pictures stored on an S3 bucket and I need to display them as video streaming on my website.

  I don’t know how to do it and if I have to do it in the backend side or frontend.

  I hear about FFMPEG, I don’t know if I can use an url in input.

• ffmpeg streaming through error

  16 janvier 2016, par user2201239

  I’m trying to stream to a streaming server with ffmpeg, its website is called http://livestreamcast.org. Everything works on FMLE, so I tried to copy the same configuration to ffmpeg, but everytime it gives me error.

  [rtmp @ 0x939e520] Unknown connect error (unsupported authentication method ?)
  [rtmp @ 0x939e520] Server error : Connection failed : Application rejected connection.
  rtmp ://live-cdn.livestreamcast.org/live/66f4a37bb72fc61cf5ca4c45bf4775c5 : Unknown error occurred

  ffmpeg -i "myhlsstream" -c:v libx264 -b:v 2500k -s 800x450 -c:a libmp3lame -b:a 20k -f flv "rtmp://live-cdn.livestreamcast.org/live/66f4a37bb72fc61cf5ca4c45bf4775c5"

  I tried many different configurations by changing bit rate, audio format, etc. but nothing works and getting same error every time.
  Or is it possible that the server reject the connects from ffpmeg encoder ? which is most probably unlikely !
  I tried to contact the website owner on skype, but got no reply and couldn’t find any support email, so I have no idea, how to make it work.

• Memory leaks when opening RTMP stream with wrong url

  3 novembre 2015, par n00bie

  I’m using libav for streaming to YouTube through RTMP. I have function openRtmpStream() for opening RTMP stream. It works well. But recently i noticed the situation, when RTMP url is wrong (or server is down). In this situation my code is trying to reconnect, and calls this function about 15 times per second. With htop i can see about 20 MB per second memory leak in this situation.

  Maybe my code for closing context and streams is wrong ? Or any another idea what I’m doing wrong ? Thanks in advance !

  Here’s my code :

  bool openRtmpStream( const std::string& address )
  
  {
  
      if( ! m_httpContext ) {
  
          m_httpContext = avformat_alloc_context( );
  
  
  
          m_httpContext->oformat = av_guess_format( "flv", address.c_str( ), nullptr );
  
          if( m_httpContext->oformat ) {
  
              strcpy( m_httpContext->filename, address.c_str( ) );
  
  
  
              auto codecID = AV_CODEC_ID_H264;
  
  
  
              auto codec = avcodec_find_encoder( codecID );
  
  
  
              if( codec ) {
  
                  m_httpVideoStream = avformat_new_stream( m_httpContext, codec );
  
  
  
                  // ... here's initalization of m_httpVideoStream->codec ...
  
  
  
                  int res = avcodec_open2( codecContext, codec, nullptr );
  
                  if( res >= 0 ) {
  
                      auto codecID = AV_CODEC_ID_MP3;
  
                      auto codec = avcodec_find_encoder( codecID );
  
                      if( codec ) {
  
                          m_httpAudioStream = avformat_new_stream( m_httpContext, codec );
  
  
  
                          // ... here's initalization of m_httpAudioStream->codec ...
  
  
  
                          res = avcodec_open2( codecContext, codec, nullptr );
  
                          if( res >= 0 ) {
  
                              m_httpStreamWriteStartTime = boost::chrono::high_resolution_clock::now( );
  
                              if( avio_open2( &m_httpContext->pb, m_httpContext->filename, AVIO_FLAG_WRITE, m_AVIOInterruptCB.get( ), nullptr ) >= 0 ) {
  
                                  if( avformat_write_header( m_httpContext, nullptr ) >= 0 ) {
  
                                      return true; // success
  
                                  }
  
                              }
  
                              avcodec_close( m_httpAudioStream->codec );
  
                          }
  
                      }
  
                      avcodec_close( m_httpVideoStream->codec );
  
                  }
  
              }
  
          }
  
  
  
          // failed to open stream, close context and streams
  
  
  
          avio_close( m_httpContext->pb );
  
          avformat_free_context( m_httpContext );
  
          m_httpContext = nullptr;
  
          m_httpVideoStream = nullptr;
  
          m_httpAudioStream = nullptr;
  
      }
  
      return false;
  
  }