Android 接收多个RTP、混合、输出RTSP流

我目前正在尝试接收多个RTP音频流，混合它们，并使用ffmpeg或ffserver输出RTSP流

RTP音频流由Android AudioStream发送

下面是Android端的代码

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);

然后我准备服务器端

这里是ffserver.conf

HTTPPort 5555
HTTPBindAddress 0.0.0.0
RTSPPort 5454
RTSPBindAddress 0.0.0.0
MaxHTTPConnections 100
MaxClients 1000
MaxBandwidth 10000
CustomLog -

<Feed feed1.ffm>
  File /tmp/feed1.ffm
  FileMaxSize 500M
</Feed>

<Stream live.wav>
  Format rtp
  Feed feed1.ffm
  AudioBitRate 13
  AudioChannels 1
  AudioSampleRate 8000
  AudioCodec pcm_mulaw
  # AudioCodec libmp3lame
  NoVideo
</Stream>

我无法解决如何接收多个rtp流以及如何混合它们

请给一些想法和实际的链接，我可以找到答案

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