Create broadcast with high sound quality like android emulator.

[raravel]

1. Create rtmp server.

async function createLive() {
  const user = getUser();
  const req = await sopia.api.lives.create({
    data: {
      "is_adult":false,
      "is_save":false,
      "donation":0,
      "title":"테스트",
      "type":0,
      "welcome_message":"말이 없삼\n회사임\n채팅쳐도 못 볼 가능성 큼",
      "invite_member_ids":[],
      "tags":["1"],
      "categories":["daily"],
      "engine":{"name":"sori","host":""},
      "is_live_call":false,
      "device_unique_id":sopia.deviceUUID,
      "spoon_aim":[]
    },
  });
  const live = req.res.results[0];
  console.log('live', live);

  const host_address = ((live as any).host_address as string);
  const port = 5021;

  const res = await axios({
    url: `http://${host_address}:${port}/sori/4/publish/${live.stream_name}`,
    method: 'post',
    headers: {
      'authorization': `Bearer ${user.token}`,
      'x-live-authorization': live.jwt,
    },
    data: {
      media: {
        type: 'audio',
        protocol: 'rtmp',
        format: 'aac',
      },
      reason: {
        code: 50000,
        message: 'unknown',
      },
      props: {
        country: sopia.country,
        stage: 'prod',
        live_id: live.id.toString(),
        user_id: user.id.toString(),
        user_tag: user.tag,
        platform: 'sopia',
        os: 'Linux',
      },
    },
  });
  console.log('live publish', res);
  await live.join(live.jwt);
  console.log(`${res.data.publish.rtmp.url}/${res.data.publish.rtmp.name}`);
}

2. Connect rtmp session

ffmpeg -re -f mp3 -i sound.mp3 -c:v libx264 -c:a aac -vn -strict experimental  -f flv [url]

3. Join live room

live.join(live.jwt)

[raravel]

www.spooncast.net.zip

Create live include custom image.

[raravel]

recording audio file to blobevent

ctx = new AudioContext()
ctx.decodeAudioData(test.buffer).then((r) => window.tttt = r)
src = ctx.createBufferSource()
src.buffer = tttt;
dest = ctx.createMediaStreamDestination()
recorder = new MediaRecorder(dest.stream)
recorder.ondataavailable = (evt) => {
    console.log('receive data', evt);
}
src.connect(dest)
recorder.start(5000 /* time slice */)
src.start()

[raravel]

The structure of SOPIA handling audio is as follows.

• Connect AudioContext for Visual Analyzer for each track.
• Buffers for actual broadcasting are all connected to Main AudioContext and mixed.

[raravel]

If you want to record audio from the desktop, you must first loopback the playback device. (Using wasapi or virtual cable, etc.)

Loopback example (but not perfact): Use fmedia command https://github.com/stsaz/fmedia

.\fmedia.exe --dev-loopback=1 --rate=48000 --channels=2 --format=int32 --record -o "@stdout.mp3" -y

[raravel]

ffmpeg

-i - -c:a aac -vn -strict experimental  -f flv

sox

-b ${bitDepth} -e unsigned-integer -r ${sampleRate} -c ${channels} -t waveaudio ${deviceName} --clobber -p