audiobookshelf/server/utils/ffmpegHelpers.js

160 lines
5.1 KiB
JavaScript

const axios = require('axios')
const Ffmpeg = require('../libs/fluentFfmpeg')
const fs = require('../libs/fsExtra')
const Path = require('path')
const Logger = require('../Logger')
const { filePathToPOSIX } = require('./fileUtils')
function escapeSingleQuotes(path) {
// return path.replace(/'/g, '\'\\\'\'')
return filePathToPOSIX(path).replace(/ /g, '\\ ').replace(/'/g, '\\\'')
}
// Returns first track start time
// startTime is for streams starting an encode part-way through an audiobook
async function writeConcatFile(tracks, outputPath, startTime = 0) {
var trackToStartWithIndex = 0
var firstTrackStartTime = 0
// Find first track greater than startTime
if (startTime > 0) {
var currTrackEnd = 0
var startingTrack = tracks.find(t => {
currTrackEnd += t.duration
return startTime < currTrackEnd
})
if (startingTrack) {
firstTrackStartTime = currTrackEnd - startingTrack.duration
trackToStartWithIndex = startingTrack.index
}
}
var tracksToInclude = tracks.filter(t => t.index >= trackToStartWithIndex)
var trackPaths = tracksToInclude.map(t => {
var line = 'file ' + escapeSingleQuotes(t.metadata.path) + '\n' + `duration ${t.duration}`
return line
})
var inputstr = trackPaths.join('\n\n')
await fs.writeFile(outputPath, inputstr)
return firstTrackStartTime
}
module.exports.writeConcatFile = writeConcatFile
async function extractCoverArt(filepath, outputpath) {
var dirname = Path.dirname(outputpath)
await fs.ensureDir(dirname)
return new Promise((resolve) => {
var ffmpeg = Ffmpeg(filepath)
ffmpeg.addOption(['-map 0:v', '-frames:v 1'])
ffmpeg.output(outputpath)
ffmpeg.on('start', (cmd) => {
Logger.debug(`[FfmpegHelpers] Extract Cover Cmd: ${cmd}`)
})
ffmpeg.on('error', (err, stdout, stderr) => {
Logger.error(`[FfmpegHelpers] Extract Cover Error ${err}`)
resolve(false)
})
ffmpeg.on('end', () => {
Logger.debug(`[FfmpegHelpers] Cover Art Extracted Successfully`)
resolve(outputpath)
})
ffmpeg.run()
})
}
module.exports.extractCoverArt = extractCoverArt
//This should convert based on the output file extension as well
async function resizeImage(filePath, outputPath, width, height) {
return new Promise((resolve) => {
var ffmpeg = Ffmpeg(filePath)
ffmpeg.addOption(['-vf', `scale=${width || -1}:${height || -1}`])
ffmpeg.addOutput(outputPath)
ffmpeg.on('start', (cmd) => {
Logger.debug(`[FfmpegHelpers] Resize Image Cmd: ${cmd}`)
})
ffmpeg.on('error', (err, stdout, stderr) => {
Logger.error(`[FfmpegHelpers] Resize Image Error ${err} ${stdout} ${stderr}`)
resolve(false)
})
ffmpeg.on('end', () => {
Logger.debug(`[FfmpegHelpers] Image resized Successfully`)
resolve(outputPath)
})
ffmpeg.run()
})
}
module.exports.resizeImage = resizeImage
module.exports.downloadPodcastEpisode = (podcastEpisodeDownload) => {
return new Promise(async (resolve) => {
const response = await axios({
url: podcastEpisodeDownload.url,
method: 'GET',
responseType: 'stream',
timeout: 30000
}).catch((error) => {
Logger.error(`[ffmpegHelpers] Failed to download podcast episode with url "${podcastEpisodeDownload.url}"`, error)
return null
})
if (!response) return resolve(false)
const ffmpeg = Ffmpeg(response.data)
ffmpeg.outputOptions(
'-c', 'copy',
'-metadata', 'podcast=1'
)
const podcastMetadata = podcastEpisodeDownload.libraryItem.media.metadata
const podcastEpisode = podcastEpisodeDownload.podcastEpisode
const taggings = {
'album': podcastMetadata.title,
'album-sort': podcastMetadata.title,
'artist': podcastMetadata.author,
'artist-sort': podcastMetadata.author,
'comment': podcastEpisode.description,
'subtitle': podcastEpisode.subtitle,
'disc': podcastEpisode.season,
'genre': podcastMetadata.genres.length ? podcastMetadata.genres.join(';') : null,
'language': podcastMetadata.language,
'MVNM': podcastMetadata.title,
'MVIN': podcastEpisode.episode,
'track': podcastEpisode.episode,
'series-part': podcastEpisode.episode,
'title': podcastEpisode.title,
'title-sort': podcastEpisode.title,
'year': podcastEpisode.pubYear,
'date': podcastEpisode.pubDate,
'releasedate': podcastEpisode.pubDate,
'itunes-id': podcastMetadata.itunesId,
'podcast-type': podcastMetadata.type,
'episode-type': podcastMetadata.episodeType
}
for (const tag in taggings) {
if (taggings[tag]) {
ffmpeg.addOption('-metadata', `${tag}=${taggings[tag]}`)
}
}
ffmpeg.addOutput(podcastEpisodeDownload.targetPath)
ffmpeg.on('start', (cmd) => {
Logger.debug(`[FfmpegHelpers] downloadPodcastEpisode: Cmd: ${cmd}`)
})
ffmpeg.on('error', (err, stdout, stderr) => {
Logger.error(`[FfmpegHelpers] downloadPodcastEpisode: Error ${err} ${stdout} ${stderr}`)
resolve(false)
})
ffmpeg.on('end', () => {
Logger.debug(`[FfmpegHelpers] downloadPodcastEpisode: Complete`)
resolve(podcastEpisodeDownload.targetPath)
})
ffmpeg.run()
})
}