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• Receive multiple RTP, mix, output RTSP stream

  30 octobre 2017, par John

  I’m currently trying to receive multiple RTP audio stream, mixing them, and output RTSP stream by using ffmpeg or ffserver.

  RTP audio stream is send by Android AudioStream.

  Here is code Android side.

  AudioManager audio = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
  
  audio.setMode(AudioManager.MODE_IN_COMMUNICATION);
  
  
  
  audioGroup = new AudioGroup();
  
  audioGroup.setMode(AudioGroup.MODE_ECHO_SUPPRESSION);
  
  
  
  audioStream = new AudioStream(InetAddress.getByAddress(getLocalIPAddress()));
  
  audioStream.setCodec(AudioCodec.PCMU);
  
  audioStream.setMode(RtpStream.MODE_NORMAL);
  
  audioStream.associate(InetAddress.getByName(SipStackAndroid.getRemoteIp()), REMOTE_PORT);
  
  audioStream.join(audioGroup);

  Then I prepare server side.

  Here is ffserver.conf

  HTTPPort 5555
  
  HTTPBindAddress 0.0.0.0
  
  RTSPPort 5454
  
  RTSPBindAddress 0.0.0.0
  
  MaxHTTPConnections 100
  
  MaxClients 1000
  
  MaxBandwidth 10000
  
  CustomLog -
  
  
  
  <feed>
  
    File /tmp/feed1.ffm
  
    FileMaxSize 500M
  
  </feed>
  
  
  
  <stream>
  
    Format rtp
  
    Feed feed1.ffm
  
    AudioBitRate 13
  
    AudioChannels 1
  
    AudioSampleRate 8000
  
    AudioCodec pcm_mulaw
  
    # AudioCodec libmp3lame
  
    NoVideo
  
  </stream>

  And here is ffserver or ffmpeg command.

  ffserver -d -f ffserver.conf
  
  ffmpeg -i "rtp://192.168.150.10:12345" -acodec auto http://127.0.0.1:5555/feed1.ffm

  I can’t solve how to receive multiple rtp stream and how to mix them.

  Please give some ideas and actual links where I can find an answer.

• ffmpeg SDP file for Darwin Streaming Server

  10 septembre 2012, par SP Sandhu

  I am making a streaming server to view live video feed of my webcam on my mobile device.

  I considered using ffmpeg , VLC and DSS and made the following setup that worked somewhat, though the frames were skipped :-

  video4linux2 > ffserver > VLC transcoding > DSS

  (RAW to ffserver) > (outputs to SDP link) > (SDP link to SDP file) > (SDP file to live streaming to mobile)

  Later, on testing VLC i found to be very inefficient and slow on my Netbook(Intel Atom N480) as it skips lot of frames.

  DSS can stream a SDP file from its /usr/local/movies(default).

  And at the same time, ffmpeg's ffserver module can stream live feed to SDP link(not SDP file).

  My requirement is that i need to create SDP file in DSS's /usr/local/movies directory so as to pass this DSS for streaming.

  So, how to create a sdp file from ffmpeg or how to create SDP file from SDP link (without using VLC's trans-coding).

  How to do that ?

• Unable to stream swf file with ffserver

  12 août 2014, par user993766

  I’m trying to stream swf w/ flv video & mp3 audio & have had some issues. I believe my ffmpeg command line is fine, I think the problem is with my ffserver configuration. If I comment out the audio configuration, I get video output fine. If I have both, I only get audio - no video. However, upon stopping my input stream, audio will stop and video will start playing(at a faster speed than normal). Saving my ffmpeg to a file & viewing on mplayer yields both audio & video playing at the correct rate.

  Before posting an entire output dump, can anyone tell me if anything is blatantly wrong with my code ?

  FFMPEG is taking in an MPEG2 TS from a digital video tuner, transcoding to flv & mp3 :

  ffmpeg -i /dev/dvb/adapter0/dvr0 -c:v flv -r 15 -c:a mp3 -b:a 128k -ac 1 -ar 44100 http://localhost:8090/feed1.ffm

  My ffserver conf file is :

  Port 8090
  
  BindAddress 0.0.0.0
  
  MaxHTTPConnections 2000
  
  MaxClients 1000
  
  MaxBandwidth 16000
  
  CustomLog -
  
  
  
  <feed>
  
  File /tmp/feed1.ffm
  
  FileMaxSize 5M 
  
  </feed>
  
  
  
  <stream>
  
  Feed feed1.ffm
  
  Format swf
  
  
  
  AudioCodec libmp3lame
  
  AudioBitRate 128k
  
  AudioChannels 1
  
  AudioSampleRate 44100
  
  #AVOptionAudio flags +global_header
  
  
  
  #AVOptionVideo flags +global_header
  
  VideoCodec flv
  
  VideoFrameRate 15
  
  VideoBufferSize 80000
  
  VideoBitRate 100
  
  VideoQMin 1
  
  VideoQMax 5
  
  VideoSize 720x480
  
  PreRoll 0
  
  
  
  </stream>

  I’ve tried all kinds of permutations, adjusting QMax, video size, framerate & VideoBufferSize. Nothing seems to work. Any & all help appreciated !