合并米家摄像头监控视频，生成以天为单位的视频文件。

merge_mijia.py

import subprocess
from pathlib import Path
from loguru import logger


def merge_vids(vidlist_file: str, tofile: str):
    """执行 ffmpeg 命令合并视频。"""
    cmd = f"ffmpeg -f concat -safe 0 -i {vidlist_file} -c:v copy -c:a flac -strict -2 {tofile}"
    subprocess.run(cmd)


def merge_dirs(directory: str):
    """合并目录下的监控文件，在当前目录生成以天为单位的视频。
    directory 结构：
    directory
        2021051001
        2021051002
        2021051003
        ...
    即，子目录结构为：年月日时。
    """
    date_dict = {}
    for d in Path(directory).iterdir():
        if not d.is_dir():
            continue
        date = d.stem[:8]
        if date not in date_dict:
            date_dict[date] = []
        date_dict[date].append(d)
    for date, ds in date_dict.items():
        videos = []
        for d in ds:
            videos.extend(list(Path(d).glob("*.mp4")))
        logger.info(f"{date}, {len(videos)} videos")
        if not videos:
            continue
        videos = sorted(videos, key=lambda f: int(f.stem.split("_")[-1]))
        videos = [
            "file " + str(f.resolve(strict=True)).replace("\\", "/") for f in videos
        ]
        Path("vidslist.txt").write_text("\n".join(videos), encoding="utf8")
        merge_vids("vidslist.txt", f"{date}.mp4")


if __name__ == "__main__":
    merge_dirs(r"D:\Mijia\MIJIA_RECORD_VIDEO")