fix: types for the mp4box package

packages/utils/types/mp4box.d.ts

@@ -0,0 +1,43 @@
+declare module "mp4box" {
+  export interface MP4FileInfo {
+    duration: number; // Duration in timescale units
+    timescale: number; // Timescale of the file
+    isFragmented: boolean; // Whether the MP4 is fragmented
+    brands: string[]; // Major and compatible brands
+    created: Date; // Creation time
+    modified: Date; // Modification time
+    tracks: MP4Track[]; // Array of tracks in the file
+  }
+
+  export interface MP4Track {
+    id: number; // Track ID
+    type: string; // Track type (e.g., "video", "audio")
+    codec: string; // Codec used for this track
+    language: string; // Language of the track
+    created: Date; // Creation time
+    modified: Date; // Modification time
+    timescale: number; // Timescale for the track
+    duration: number; // Duration in timescale units
+    bitrate: number; // Average bitrate of the track
+    width?: number; // Video width (if applicable)
+    height?: number; // Video height (if applicable)
+    sampleCount: number; // Number of samples in the track
+    samples: any[]; // Detailed sample information
+  }
+
+  export interface MP4ArrayBuffer extends ArrayBuffer {
+    fileStart: number; // Start position of the buffer in the file
+  }
+
+  export interface MP4BoxFile {
+    onReady?: (info: MP4FileInfo) => void;
+    onError?: (error: string) => void;
+    appendBuffer(data: ArrayBuffer): number;
+    start(): void;
+    stop(): void;
+    flush(): void;
+    createFile(): MP4BoxFile;
+  }
+
+  export function createFile(): MP4BoxFile;
+}