pymp4

import os from pymp4.parser import BoxParser # For demonstration, we'll create a dummy MP4 file. # In a real scenario, you would open an existing MP4 file. dummy_mp4_path = "dummy_test.mp4" try: # A minimal, valid MP4 often starts with an 'ftyp' box. # This is not a full MP4 file, just a placeholder to demonstrate parsing. # Real files are more complex and would have many more boxes. with open(dummy_mp4_path, "wb") as f: f.write(b'\x00\x00\x00\x18ftypisom\x00\x00\x00\x01isomiso2avc1mp41') f.write(b'\x00\x00\x00\x08moov') # Placeholder for a moov box # Initialize the parser parser = BoxParser() # Open the MP4 file in binary read mode with open(dummy_mp4_path, "rb") as f: # Parse all top-level boxes print(f"Parsing boxes from '{dummy_mp4_path}':") for box in parser.parse(f): print(f" Parsed Box: type={box.type.decode('ascii')}, size={box.size}") if box.type == b'ftyp': print(f" Major Brand: {box.major_brand.decode('ascii')}") print(f" Minor Version: {box.minor_version}") print(f" Compatible Brands: {[b.decode('ascii') for b in box.compatible_brands]}") elif box.type == b'moov': print(f" (This is a placeholder moov box. Real ones contain child boxes like 'trak', 'mvhd' etc.)") except FileNotFoundError: print(f"Error: Dummy file '{dummy_mp4_path}' could not be created or found.") except Exception as e: print(f"An unexpected error occurred: {e}") finally: # Clean up the dummy file if os.path.exists(dummy_mp4_path): os.remove(dummy_mp4_path) print(f"Cleaned up '{dummy_mp4_path}'.")