mirror of
https://github.com/advplyr/audiobookshelf.git
synced 2024-12-20 19:06:06 +01:00
310 lines
11 KiB
JavaScript
310 lines
11 KiB
JavaScript
const axios = require('axios')
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const Ffmpeg = require('../libs/fluentFfmpeg')
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const fs = require('../libs/fsExtra')
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const os = require('os')
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const Path = require('path')
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const Logger = require('../Logger')
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const { filePathToPOSIX } = require('./fileUtils')
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function escapeSingleQuotes(path) {
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// return path.replace(/'/g, '\'\\\'\'')
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return filePathToPOSIX(path).replace(/ /g, '\\ ').replace(/'/g, "\\'")
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}
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// Returns first track start time
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// startTime is for streams starting an encode part-way through an audiobook
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async function writeConcatFile(tracks, outputPath, startTime = 0) {
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var trackToStartWithIndex = 0
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var firstTrackStartTime = 0
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// Find first track greater than startTime
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if (startTime > 0) {
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var currTrackEnd = 0
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var startingTrack = tracks.find((t) => {
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currTrackEnd += t.duration
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return startTime < currTrackEnd
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})
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if (startingTrack) {
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firstTrackStartTime = currTrackEnd - startingTrack.duration
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trackToStartWithIndex = startingTrack.index
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}
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}
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var tracksToInclude = tracks.filter((t) => t.index >= trackToStartWithIndex)
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var trackPaths = tracksToInclude.map((t) => {
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var line = 'file ' + escapeSingleQuotes(t.metadata.path) + '\n' + `duration ${t.duration}`
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return line
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})
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var inputstr = trackPaths.join('\n\n')
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try {
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await fs.writeFile(outputPath, inputstr)
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return firstTrackStartTime
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} catch (error) {
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Logger.error(`[ffmpegHelpers] Failed to write stream concat file at "${outputPath}"`, error)
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return null
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}
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}
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module.exports.writeConcatFile = writeConcatFile
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async function extractCoverArt(filepath, outputpath) {
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var dirname = Path.dirname(outputpath)
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await fs.ensureDir(dirname)
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return new Promise((resolve) => {
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var ffmpeg = Ffmpeg(filepath)
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ffmpeg.addOption(['-map 0:v', '-frames:v 1'])
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ffmpeg.output(outputpath)
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ffmpeg.on('start', (cmd) => {
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Logger.debug(`[FfmpegHelpers] Extract Cover Cmd: ${cmd}`)
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})
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ffmpeg.on('error', (err, stdout, stderr) => {
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Logger.error(`[FfmpegHelpers] Extract Cover Error ${err}`)
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resolve(false)
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})
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ffmpeg.on('end', () => {
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Logger.debug(`[FfmpegHelpers] Cover Art Extracted Successfully`)
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resolve(outputpath)
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})
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ffmpeg.run()
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})
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}
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module.exports.extractCoverArt = extractCoverArt
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//This should convert based on the output file extension as well
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async function resizeImage(filePath, outputPath, width, height) {
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return new Promise((resolve) => {
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var ffmpeg = Ffmpeg(filePath)
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ffmpeg.addOption(['-vf', `scale=${width || -1}:${height || -1}`])
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ffmpeg.addOutput(outputPath)
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ffmpeg.on('start', (cmd) => {
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Logger.debug(`[FfmpegHelpers] Resize Image Cmd: ${cmd}`)
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})
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ffmpeg.on('error', (err, stdout, stderr) => {
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Logger.error(`[FfmpegHelpers] Resize Image Error ${err} ${stdout} ${stderr}`)
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resolve(false)
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})
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ffmpeg.on('end', () => {
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Logger.debug(`[FfmpegHelpers] Image resized Successfully`)
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resolve(outputPath)
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})
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ffmpeg.run()
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})
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}
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module.exports.resizeImage = resizeImage
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module.exports.downloadPodcastEpisode = (podcastEpisodeDownload) => {
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return new Promise(async (resolve) => {
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const response = await axios({
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url: podcastEpisodeDownload.url,
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method: 'GET',
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responseType: 'stream',
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headers: {
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'User-Agent': 'audiobookshelf (+https://audiobookshelf.org; like iTMS)'
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},
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timeout: 30000
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}).catch((error) => {
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Logger.error(`[ffmpegHelpers] Failed to download podcast episode with url "${podcastEpisodeDownload.url}"`, error)
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return null
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})
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if (!response) return resolve(false)
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const ffmpeg = Ffmpeg(response.data)
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ffmpeg.addOption('-loglevel debug') // Debug logs printed on error
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ffmpeg.outputOptions('-c:a', 'copy', '-map', '0:a', '-metadata', 'podcast=1')
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const podcastMetadata = podcastEpisodeDownload.libraryItem.media.metadata
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const podcastEpisode = podcastEpisodeDownload.podcastEpisode
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const finalSizeInBytes = Number(podcastEpisode.enclosure?.length || 0)
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const taggings = {
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album: podcastMetadata.title,
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'album-sort': podcastMetadata.title,
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artist: podcastMetadata.author,
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'artist-sort': podcastMetadata.author,
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comment: podcastEpisode.description,
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subtitle: podcastEpisode.subtitle,
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disc: podcastEpisode.season,
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genre: podcastMetadata.genres.length ? podcastMetadata.genres.join(';') : null,
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language: podcastMetadata.language,
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MVNM: podcastMetadata.title,
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MVIN: podcastEpisode.episode,
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track: podcastEpisode.episode,
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'series-part': podcastEpisode.episode,
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title: podcastEpisode.title,
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'title-sort': podcastEpisode.title,
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year: podcastEpisode.pubYear,
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date: podcastEpisode.pubDate,
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releasedate: podcastEpisode.pubDate,
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'itunes-id': podcastMetadata.itunesId,
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'podcast-type': podcastMetadata.type,
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'episode-type': podcastMetadata.episodeType
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}
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for (const tag in taggings) {
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if (taggings[tag]) {
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if (taggings[tag].length > 10000) {
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Logger.warn(`[ffmpegHelpers] Episode download tag "${tag}" is too long (${taggings[tag].length} characters) - trimming it down`)
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taggings[tag] = taggings[tag].slice(0, 10000)
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}
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ffmpeg.addOption('-metadata', `${tag}=${taggings[tag]}`)
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}
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}
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ffmpeg.addOutput(podcastEpisodeDownload.targetPath)
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const stderrLines = []
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ffmpeg.on('stderr', (stderrLine) => {
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if (typeof stderrLine === 'string') {
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stderrLines.push(stderrLine)
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}
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})
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ffmpeg.on('start', (cmd) => {
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Logger.debug(`[FfmpegHelpers] downloadPodcastEpisode: Cmd: ${cmd}`)
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})
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ffmpeg.on('error', (err) => {
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Logger.error(`[FfmpegHelpers] downloadPodcastEpisode: Error ${err}`)
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if (stderrLines.length) {
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Logger.error(`Full stderr dump for episode url "${podcastEpisodeDownload.url}": ${stderrLines.join('\n')}`)
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}
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resolve(false)
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})
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ffmpeg.on('progress', (progress) => {
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let progressPercent = 0
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if (finalSizeInBytes && progress.targetSize && !isNaN(progress.targetSize)) {
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const finalSizeInKb = Math.floor(finalSizeInBytes / 1000)
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progressPercent = Math.min(1, progress.targetSize / finalSizeInKb) * 100
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}
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Logger.debug(`[FfmpegHelpers] downloadPodcastEpisode: Progress estimate ${progressPercent.toFixed(0)}% (${progress?.targetSize || 'N/A'} KB) for "${podcastEpisodeDownload.url}"`)
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})
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ffmpeg.on('end', () => {
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Logger.debug(`[FfmpegHelpers] downloadPodcastEpisode: Complete`)
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resolve(podcastEpisodeDownload.targetPath)
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})
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ffmpeg.run()
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})
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}
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/**
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* Generates ffmetadata file content from the provided metadata object and chapters array.
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* @param {Object} metadata - The input metadata object.
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* @param {Array} chapters - An array of chapter objects.
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* @returns {string} - The ffmetadata file content.
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*/
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function generateFFMetadata(metadata, chapters) {
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let ffmetadataContent = ';FFMETADATA1\n'
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// Add global metadata
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for (const key in metadata) {
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if (metadata[key]) {
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ffmetadataContent += `${key}=${escapeFFMetadataValue(metadata[key])}\n`
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}
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}
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// Add chapters
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chapters.forEach((chapter) => {
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ffmetadataContent += '\n[CHAPTER]\n'
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ffmetadataContent += `TIMEBASE=1/1000\n`
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ffmetadataContent += `START=${Math.floor(chapter.start * 1000)}\n`
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ffmetadataContent += `END=${Math.floor(chapter.end * 1000)}\n`
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if (chapter.title) {
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ffmetadataContent += `title=${escapeFFMetadataValue(chapter.title)}\n`
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}
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})
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return ffmetadataContent
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}
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module.exports.generateFFMetadata = generateFFMetadata
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/**
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* Adds an ffmetadata and optionally a cover image to an audio file using fluent-ffmpeg.
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* @param {string} audioFilePath - Path to the input audio file.
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* @param {string|null} coverFilePath - Path to the cover image file.
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* @param {string} metadataFilePath - Path to the ffmetadata file.
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*/
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async function addCoverAndMetadataToFile(audioFilePath, coverFilePath, metadataFilePath) {
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return new Promise((resolve) => {
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const tempFilePath = Path.join(os.tmpdir(), 'temp_output.m4b')
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let ffmpeg = Ffmpeg()
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ffmpeg.input(audioFilePath).input(metadataFilePath).outputOptions([
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'-map 0:a', // map audio stream from input file
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'-map_metadata 1', // map metadata from metadata file
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'-map_chapters 1', // map chapters from metadata file
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'-c copy', // copy streams
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'-f mp4' // force mp4 format
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])
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if (coverFilePath) {
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ffmpeg.input(coverFilePath).outputOptions([
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'-map 2:v', // map video stream from cover image file
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'-disposition:v:0 attached_pic', // set cover image as attached picture
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'-metadata:s:v',
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'title=Cover', // add title metadata to cover image stream
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'-metadata:s:v',
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'comment=Cover' // add comment metadata to cover image stream
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])
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} else {
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ffmpeg.outputOptions([
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'-map 0:v?' // retain video stream from input file if exists
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])
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}
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ffmpeg
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.output(tempFilePath)
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.on('start', function (commandLine) {
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Logger.debug('[ffmpegHelpers] Spawned Ffmpeg with command: ' + commandLine)
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})
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.on('end', (stdout, stderr) => {
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Logger.debug('[ffmpegHelpers] ffmpeg stdout:', stdout)
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Logger.debug('[ffmpegHelpers] ffmpeg stderr:', stderr)
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fs.copyFileSync(tempFilePath, audioFilePath)
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fs.unlinkSync(tempFilePath)
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resolve(true)
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})
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.on('error', (err, stdout, stderr) => {
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Logger.error('Error adding cover image and metadata:', err)
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Logger.error('ffmpeg stdout:', stdout)
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Logger.error('ffmpeg stderr:', stderr)
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resolve(false)
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})
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ffmpeg.run()
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})
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}
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module.exports.addCoverAndMetadataToFile = addCoverAndMetadataToFile
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function escapeFFMetadataValue(value) {
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return value.replace(/([;=\n\\#])/g, '\\$1')
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}
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function getFFMetadataObject(libraryItem, audioFilesLength) {
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const metadata = libraryItem.media.metadata
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const ffmetadata = {
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title: metadata.title,
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artist: metadata.authors?.map((a) => a.name).join(', '),
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album_artist: metadata.authors?.map((a) => a.name).join(', '),
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album: (metadata.title || '') + (metadata.subtitle ? `: ${metadata.subtitle}` : ''),
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genre: metadata.genres?.join('; '),
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date: metadata.publishedYear,
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comment: metadata.description,
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description: metadata.description,
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composer: metadata.narratorName,
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copyright: metadata.publisher,
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grouping: metadata.series?.map((s) => s.name + (s.sequence ? ` #${s.sequence}` : '')).join(', ')
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}
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Object.keys(ffmetadata).forEach((key) => {
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if (!ffmetadata[key]) {
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delete ffmetadata[key]
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}
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})
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return ffmetadata
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}
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module.exports.getFFMetadataObject = getFFMetadataObject
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