wranglebot/build/core/transcode/TranscodeFactory.js

open source media asset management

import { config, finder } from "../system/index.js";
import ffmpeg from "fluent-ffmpeg";
export default class TranscodeFactory {
    constructor(inputPath, options) {
        this.output = options.output;
        this.command = ffmpeg({
            logger: console,
        });
        this.command.input(inputPath);
        this.command
            .inputOptions("-hwaccel auto")
            .videoCodec(options.videoCodec)
            .videoBitrate(options.videoBitrate)
            .size(options.width + "x" + options.height)
            .aspect("16:9")
            .autopad("black")
            .audioBitrate(options.audioBitrate)
            .audioChannels(options.audioChannels)
            .audioCodec(options.audioCodec)
            .outputOptions([`-pix_fmt ${options.pixelFormat || "yuv422p"}`])
            .fps(options.fps)
            .output(options.output);
        if (options.lut) {
            if (finder.existsSync(options.lut) && !finder.isDirectory(options.lut)) {
                this.command.videoFilter("lut3d=" + options.lut);
            }
            else {
                const defaultPathToLuts = finder.join(config.getPathToUserData(), "LUTs", options.lut);
                if (finder.existsSync(defaultPathToLuts)) {
                    options.lut = defaultPathToLuts;
                    this.command.videoFilter("lut3d=" + options.lut);
                }
                else {
                    options.lut = false;
                }
            }
        }
    }
    run(callback, cancelToken) {
        return new Promise((resolve, reject) => {
            if (!finder.existsSync(this.output)) {
                finder.mkdirSync(finder.dirname(this.output), { recursive: true });
            }
            this.command.on("error", (err, stdout, stderr) => {
                console.log(err, stdout, stderr);
            });
            this.command.on("codecData", (data) => { });
            this.command.on("progress", (progress) => {
                if (cancelToken.cancel) {
                    this.command.kill();
                    resolve(false);
                }
                callback(progress);
            });
            this.command.on("end", (err, stdout, stderr) => {
                resolve(true);
            });
            this.command.run();
        });
    }
}
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