ff-helper/lib/index.js

ffmpeg helper by napi-rs binding

"use strict";
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    if (k2 === undefined) k2 = k;
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    if (k2 === undefined) k2 = k;
    o[k2] = m[k];
}));
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    Object.defineProperty(o, "default", { enumerable: true, value: v });
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    o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
    if (mod && mod.__esModule) return mod;
    var result = {};
    if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
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var __exportStar = (this && this.__exportStar) || function(m, exports) {
    for (var p in m) if (p !== "default" && !Object.prototype.hasOwnProperty.call(exports, p)) __createBinding(exports, m, p);
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var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.getVideoPreviewScale = exports.screengenScale = exports.screengen = exports.getScreenshotScale = exports.getVideoDurationDisplay = exports.getVideoDurationDisplaySync = void 0;
const dayjs_1 = __importDefault(require("dayjs"));
const duration_1 = __importDefault(require("dayjs/plugin/duration"));
dayjs_1.default.extend(duration_1.default);
const addon = __importStar(require("../addon"));
__exportStar(require("../addon"), exports);
/**
 * synchronous get humanized video duration for display, like `00:10:30` mean 10 minutes 30 seconds
 */
function getVideoDurationDisplaySync(file) {
    return displayMs(addon.getVideoDurationSync(file));
}
exports.getVideoDurationDisplaySync = getVideoDurationDisplaySync;
/**
 * get humanized video duration for display, like `00:10:30` mean 10 minutes 30 seconds
 */
async function getVideoDurationDisplay(file) {
    return displayMs(await addon.getVideoDuration(file));
}
exports.getVideoDurationDisplay = getVideoDurationDisplay;
function displayMs(ms) {
    return dayjs_1.default.duration(ms, 'milliseconds').format('HH:mm:ss');
}
function validateScale(scale) {
    // fallback scale=1.0
    scale || (scale = 1);
    if (scale > 1)
        scale = 1;
    if (scale <= 0)
        throw new Error('scale <= 0 not supported');
    return scale;
}
/**
 * screenshot for video, with scale
 *
 * @param file the video file
 * @param ts the given timestamp, in millseconds
 * @param scale scale of video width & height
 *
 * @returns Buffer encoded with mozjpeg
 */
async function getScreenshotScale(file, ts, scale) {
    scale = validateScale(scale);
    const info = await addon.getVideoInfo(file);
    const width = info.displayWidth * scale;
    const height = info.displayHeight * scale;
    return addon.getScreenshot(file, ts, width, height);
}
exports.getScreenshotScale = getScreenshotScale;
// alias to screengen
exports.screengen = addon.getScreenshot;
exports.screengenScale = getScreenshotScale;
/**
 * generate preview for video, with scale
 */
async function getVideoPreviewScale(file, rows, cols, scale) {
    scale = validateScale(scale);
    const info = await addon.getVideoInfo(file);
    const frameWidth = info.displayWidth * scale;
    const frameHeight = info.displayHeight * scale;
    return addon.getVideoPreview(file, rows, cols, frameWidth, frameHeight);
}
exports.getVideoPreviewScale = getVideoPreviewScale;