米家摄像头 分钟 视频合并

prepareFfmpegInputVideoLists.js

const path = require('path');
const fs = require('fs');

const cameraVideoDir = '/mnt/d/Oolong/xiaomi/xiaomi_camera_videos/04cf8cc737da';

let videoDateHourMinutes = fs.readdirSync(cameraVideoDir).filter(function (name) {
    return /^\d{10}$/.test(name);
}).reduce(function (ret, name) {
    let date = name.substring(0, 8);
    if (!ret[date]) ret[date] = [];
    ret[date].push(name);
    return ret;
}, {});

console.log(`Found ${Object.keys(videoDateHourMinutes).length} days' videos`);

Object.entries(videoDateHourMinutes).forEach(function ([date, dirnames]) {
    let filenames = dirnames.reduce(function (ret, dirname) {
        return ret.concat(fs.readdirSync(path.join(cameraVideoDir, dirname)).filter(function (filename) {
            return filename.endsWith('.mp4');
        }).sort(function (a, b) {
            return parseInt(a.substring(0, 2), 10) > parseInt(b.substring(0, 2), 10) ? 1 : -1;
        }).map(function (filename) {
            return path.join(cameraVideoDir, dirname, filename);
        }));
    }, []);

    console.log('Saving video list to file');
    let outputFilename = `videolist_${date}.txt`;
    fs.writeFileSync(outputFilename, filenames.map(function (filename) {
        return `file '${filename}'`;
    }).join('\n'));
    console.log(`ffmpeg -y -f concat -safe 0 -i ${outputFilename} -vf "setpts=0.1*PTS" -c:v libx265 -crf 28 -c:a aac -b:a 128k v${date}.mp4`);
});