Function getEncoderPreset

packages/engine/src/services/chunkEncoder.ts:99–131

(
  quality: "draft" | "standard" | "high",
  format: "mp4" | "webm" | "mov" = "mp4",
  hdr?: { transfer: HdrTransfer },
)

 * MOV uses ProRes 4444 with alpha for editor-compatible transparency.
 */
export function getEncoderPreset(
  quality: "draft" | "standard" | "high",
  format: "mp4" | "webm" | "mov" = "mp4",
  hdr?: { transfer: HdrTransfer },
): EncoderPreset {
  const base = ENCODER_PRESETS[quality];
  if (format === "webm") {
    return {
      preset: base.preset === "ultrafast" ? "realtime" : "good",
      quality: base.quality,
      codec: "vp9",
      pixelFormat: "yuva420p",
    };
  }
  if (format === "mov") {
    return {
      preset: "4444",
      quality: base.quality,
      codec: "prores",
      pixelFormat: "yuva444p10le",
    };
  }
  if (hdr) {
    return {
      preset: base.preset === "ultrafast" ? "fast" : base.preset,
      quality: base.quality,
      codec: "h265",
      pixelFormat: "yuv420p10le",
      hdr,
    };
  }
  return { ...base, pixelFormat: "yuv420p" };
}

// Re-export GPU utilities so existing consumers that import from chunkEncoder still work.
export { detectGpuEncoder, type GpuEncoder } from "../utils/gpuEncoder.js";