Adaptive Bitrate Streaming

import { WaveClient } from '@wave/sdk';

const wave = new WaveClient({
  apiKey: process.env.WAVE_API_KEY,
});

// Create ABR-enabled stream with full configuration
async function createABRStream() {
  const stream = await wave.streams.create({
    title: 'Adaptive Quality Stream',
    protocol: 'webrtc',

    // ABR Configuration
    abr: {
      enabled: true,
      ladder: 'default', // 'default' | 'dense' | 'sparse' | 'mobile-first' | 'broadcast'

      // Custom profiles (optional - overrides ladder preset)
      profiles: [
        { name: '4K', width: 3840, height: 2160, bitrate: 15000, fps: 60, codec: 'h265' },
        { name: '1080p', width: 1920, height: 1080, bitrate: 4500, fps: 30, codec: 'h264' },
        { name: '720p', width: 1280, height: 720, bitrate: 2500, fps: 30, codec: 'h264' },
        { name: '480p', width: 854, height: 480, bitrate: 1200, fps: 30, codec: 'h264' },
        { name: '360p', width: 640, height: 360, bitrate: 700, fps: 30, codec: 'h264' },
        { name: '240p', width: 426, height: 240, bitrate: 400, fps: 24, codec: 'h264' },
      ],

      // Player adaptation settings
      adaptation: {
        strategy: 'hybrid',          // 'bandwidth' | 'buffer' | 'hybrid' | 'quality-first'
        switchUpThreshold: 1.5,      // Switch up when bandwidth is 1.5x current bitrate
        switchDownThreshold: 0.8,    // Switch down when bandwidth drops to 0.8x
        minSwitchInterval: 5000,     // Minimum 5 seconds between quality switches
        startQuality: 'auto',        // 'auto' | 'lowest' | 'highest' | specific profile
        maxQuality: '4K',            // Maximum quality to use (for cost control)
        bufferTarget: 20000,         // Target buffer in milliseconds
        lowBufferThreshold: 5000,    // Trigger down-switch when buffer falls below 5s
      },

      // Encoding settings
      encoding: {
        preset: 'balanced',          // 'fast' | 'balanced' | 'quality'
        keyframeInterval: 2,         // Keyframe every 2 seconds (for switching)
        segmentDuration: 4,          // HLS segment duration in seconds
        perTitleEncoding: true,      // Optimize bitrate per content type
      },
    },
  });

  console.log('Master Playlist:', stream.hlsUrl);
  console.log('DASH Manifest:', stream.dashUrl);
  console.log('Profiles:', stream.abr.profiles.map(p => p.name).join(', '));

  return stream;
}