@henteko/kumiki/dist/generators/subtitle/index.js

A video generation tool that creates videos from JSON configurations

import fs from 'node:fs/promises';
import path from 'node:path';
import { SubtitleTiming } from './timing.js';
import { WebVTTFormatter } from './webvtt.js';
import { logger } from '../../utils/logger.js';
export class SubtitleGenerator {
    timing;
    formatter;
    constructor() {
        this.timing = new SubtitleTiming();
        this.formatter = new WebVTTFormatter();
    }
    generate(project, options = {}) {
        const { maxLineLength = 40, maxLines = 2, minDuration = 1 } = options;
        logger.info('Generating subtitles', { projectName: project.name });
        const cues = [];
        const sceneTiming = this.timing.calculateSceneTiming(project.scenes);
        for (const scene of project.scenes) {
            const timing = sceneTiming.get(scene.id);
            if (!timing)
                continue;
            const cue = this.timing.createCueFromScene(scene, timing.start, timing.end, { minDuration });
            if (cue) {
                const processedText = this.timing.splitLongText(cue.text, maxLineLength, maxLines);
                cues.push({
                    ...cue,
                    text: processedText
                });
            }
        }
        logger.info('Generated subtitle cues', { count: cues.length });
        return this.formatter.format(cues);
    }
    async save(content, outputPath) {
        try {
            await fs.mkdir(path.dirname(outputPath), { recursive: true });
            await fs.writeFile(outputPath, content, 'utf-8');
            logger.info('Subtitle file saved', { path: outputPath });
        }
        catch (error) {
            logger.error('Failed to save subtitle file', { error, path: outputPath });
            throw error;
        }
    }
    async generateAndSave(project, outputPath, options = {}) {
        const content = this.generate(project, options);
        await this.save(content, outputPath);
    }
}
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