Convert your bilibili local cache to mp4

bilibili_cache_converter.py

import subprocess
import shlex
import json
import sys
from pathlib import Path
from numpy import fromfile, uint8  # pip install numpy

ROOT = Path(sys.argv[0]).resolve().parent
for dir in ROOT.iterdir():
    if not dir.name.startswith("22"):
        continue
    metapath = Path.joinpath(dir, ".videoInfo")
    print("dir",dir)
    with open(metapath) as f:
        meta = json.load(f)

    # print("meta",meta)
    title = meta["title"]
    print("title", title)
    for f in dir.rglob("**/*.m4s"):
        read = fromfile(f, dtype=uint8)
        if all(read[0:3] == [48, 48, 48]):
            print("48!")
            if '300' in f.name:
                outfile = "video.mp4"
                read[9:].tofile(ROOT / outfile)
            if '302' in f.name:
                outfile = "audio.mp3"
                read[9:].tofile(ROOT / outfile)
        else:
            print("else")
            print("read 0 9", read[0:9])
    subprocess.call(shlex.split(f"ffmpeg -i video.mp4 -i audio.mp3 -codec copy {title}.mp4"))