"""通用文件 MD5 计算：供入库查重（video_scanner）和重复检测报告（dedup_finder）共用。"""
import hashlib


def compute_md5(path, chunk_size=1024 * 1024):
    h = hashlib.md5()
    with open(path, "rb") as f:
        while chunk := f.read(chunk_size):
            h.update(chunk)
    return h.hexdigest()