Function presetArg

packages/engine/src/services/chunkEncoder.test.ts:747–750

(args: string[])

  const inputArgs = ["-framerate", "30", "-i", "frames/%04d.png"];

  function presetArg(args: string[]): string | undefined {
    const idx = args.indexOf("-preset");
    return idx === -1 ? undefined : args[idx + 1];
  }

  // Regression for the "draft quality + --gpu fails with code -22" bug:
  // NVENC rejects the libx264 preset name `ultrafast` with AVERROR(EINVAL),