@omnimedia/omnitool/x/timeline/parts/media.js

open source video processing tools

import { ALL_FORMATS, Input } from "mediabunny";
import { loadDecoderSource } from "../../driver/utils/load-decoder-source.js";
export class Media {
    datafile;
    duration = 0;
    isImage = false;
    hasVideo = false;
    hasAudio = false;
    constructor(datafile) {
        this.datafile = datafile;
    }
    static async analyze(datafile) {
        const media = new this(datafile);
        if (this.#isImage(datafile)) {
            media.isImage = true;
            return media;
        }
        const duration = (await this.duration(datafile.url)) * 1000;
        media.duration = duration;
        const { video, audio } = await this.#has(datafile.url);
        media.hasAudio = audio;
        media.hasVideo = video;
        return media;
    }
    static #isImage(datafile) {
        return datafile.blob.type.startsWith("image/");
    }
    static async duration(source) {
        const input = new Input({
            formats: ALL_FORMATS,
            source: await loadDecoderSource(source)
        });
        const duration = await input.computeDuration();
        return Number(duration.toFixed(5)); // fix weird floating points
    }
    static async #has(source) {
        const input = new Input({
            formats: ALL_FORMATS,
            source: await loadDecoderSource(source)
        });
        return {
            audio: !!(await input.getPrimaryAudioTrack()),
            video: !!(await input.getPrimaryVideoTrack())
        };
    }
}
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