mfx/lib/codec/avc.ts

In-browser video editing toolkit, with effects accelerated by WebGL

export type AVCProfileLevel = "baseline" | "main" | "high";
export type AVCLevel =
  | "3.0"
  | "3.1"
  | "4.0"
  | "4.1"
  | "4.2"
  | "5.0"
  | "5.1"
  | "5.2";

export const avc = {
  generateCodecString: (profile: AVCProfileLevel, level: AVCLevel): string => {
    const profileString = {
      baseline: "42E0",
      main: "4D40",
      high: "6400",
    }[profile];
    const levelString = {
      "3.0": "1E",
      "3.1": "1F",
      "4.0": "28",
      "4.1": "29",
      "4.2": "2A",
      "5.0": "32",
      "5.1": "33",
      "5.2": "34",
    }[level];

    if (!profileString || !levelString) {
      throw new Error("Invalid profile or level");
    }

    return `avc1.${profileString}${levelString}`;
  },
};