@calipsa/video-utils/dist/getVideoSnapshotsFixed/index.js

Video utilities

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const lodash_1 = require("lodash");
const getFrameAt_1 = __importDefault(require("../getFrameAt"));
exports.default = async ({ path, numFrames, videoMetadata, ffmpegCommandOptions, configureFfmpeg, }) => {
    const videoStreamMetaData = videoMetadata.streams.find(item => item.codec_type === 'video');
    if (!videoStreamMetaData) {
        throw new Error('No video streams found');
    }
    const { nb_frames: numInputFramesStr, start_time: startTime = 0, duration: durationStr, } = videoStreamMetaData;
    const duration = durationStr === undefined ? undefined : +durationStr;
    if (!duration || !Number.isFinite(duration)) {
        throw new TypeError(`ffprobe returned invalid duration: ${durationStr}`);
    }
    if (numFrames === 1) {
        const frame = await (0, getFrameAt_1.default)({
            path,
            time: startTime + duration / 2,
            ffmpegCommandOptions,
            configureFfmpeg,
        });
        return [frame];
    }
    const numInputFrames = numInputFramesStr === undefined ? undefined : +numInputFramesStr;
    const interval = numInputFrames
        ? duration / (numFrames - 1) * (1 - 1 / numInputFrames)
        : duration / numFrames;
    const promises = (0, lodash_1.range)(numFrames).map(async (i) => {
        const time = startTime + i * interval;
        const buffer = await (0, getFrameAt_1.default)({
            path,
            time,
            ffmpegCommandOptions,
            configureFfmpeg,
        });
        return buffer?.length > 0 && buffer;
    });
    const arr = await Promise.all(promises);
    return (0, lodash_1.compact)(arr);
};
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