ff-helper
Version:
ffmpeg helper by napi-rs binding
105 lines (104 loc) • 4.04 kB
JavaScript
;
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || (function () {
var ownKeys = function(o) {
ownKeys = Object.getOwnPropertyNames || function (o) {
var ar = [];
for (var k in o) if (Object.prototype.hasOwnProperty.call(o, k)) ar[ar.length] = k;
return ar;
};
return ownKeys(o);
};
return function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== "default") __createBinding(result, mod, k[i]);
__setModuleDefault(result, mod);
return result;
};
})();
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);
};
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.screengenScale = exports.screengen = void 0;
exports.getVideoDurationDisplaySync = getVideoDurationDisplaySync;
exports.getVideoDurationDisplay = getVideoDurationDisplay;
exports.getScreenshotScale = getScreenshotScale;
exports.getVideoPreviewScale = getVideoPreviewScale;
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));
}
/**
* 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));
}
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);
}
// 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);
}