mirror of
https://github.com/advplyr/audiobookshelf.git
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2de8c72131
FFmpeg only supports a very limited number of tags for m4b files (see https://wiki.multimedia.cx/index.php?title=FFmpeg_Metadata) by default. `series` and `series-part` are only possible by enabling custom tags with `-movflags use_metadata_tags`. To work around that, `show` and `episode_id` are added as second option.
298 lines
10 KiB
JavaScript
298 lines
10 KiB
JavaScript
const ffprobe = require('node-ffprobe')
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const MediaProbeData = require('../scanner/MediaProbeData')
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const Logger = require('../Logger')
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function tryGrabBitRate(stream, all_streams, total_bit_rate) {
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if (!isNaN(stream.bit_rate) && stream.bit_rate) {
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return Number(stream.bit_rate)
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}
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if (!stream.tags) {
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return null
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}
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// Attempt to get bitrate from bps tags
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var bps = stream.tags.BPS || stream.tags['BPS-eng'] || stream.tags['BPS_eng']
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if (bps && !isNaN(bps)) {
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return Number(bps)
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}
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var tagDuration = stream.tags.DURATION || stream.tags['DURATION-eng'] || stream.tags['DURATION_eng']
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var tagBytes = stream.tags.NUMBER_OF_BYTES || stream.tags['NUMBER_OF_BYTES-eng'] || stream.tags['NUMBER_OF_BYTES_eng']
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if (tagDuration && tagBytes && !isNaN(tagDuration) && !isNaN(tagBytes)) {
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var bps = Math.floor(Number(tagBytes) * 8 / Number(tagDuration))
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if (bps && !isNaN(bps)) {
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return bps
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}
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}
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if (total_bit_rate && stream.codec_type === 'video') {
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var estimated_bit_rate = total_bit_rate
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all_streams.forEach((stream) => {
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if (stream.bit_rate && !isNaN(stream.bit_rate)) {
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estimated_bit_rate -= Number(stream.bit_rate)
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}
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})
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if (!all_streams.find(s => s.codec_type === 'audio' && s.bit_rate && Number(s.bit_rate) > estimated_bit_rate)) {
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return estimated_bit_rate
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} else {
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return total_bit_rate
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}
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} else if (stream.codec_type === 'audio') {
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return 112000
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} else {
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return 0
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}
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}
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function tryGrabFrameRate(stream) {
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var avgFrameRate = stream.avg_frame_rate || stream.r_frame_rate
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if (!avgFrameRate) return null
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var parts = avgFrameRate.split('/')
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if (parts.length === 2) {
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avgFrameRate = Number(parts[0]) / Number(parts[1])
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} else {
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avgFrameRate = Number(parts[0])
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}
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if (!isNaN(avgFrameRate)) return avgFrameRate
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return null
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}
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function tryGrabSampleRate(stream) {
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var sample_rate = stream.sample_rate
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if (!isNaN(sample_rate)) return Number(sample_rate)
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return null
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}
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function tryGrabChannelLayout(stream) {
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var layout = stream.channel_layout
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if (!layout) return null
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return String(layout).split('(').shift()
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}
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function tryGrabTags(stream, ...tags) {
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if (!stream.tags) return null
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for (let i = 0; i < tags.length; i++) {
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var value = stream.tags[tags[i]] || stream.tags[tags[i].toUpperCase()]
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if (value) return value
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}
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return null
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}
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function parseMediaStreamInfo(stream, all_streams, total_bit_rate) {
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var info = {
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index: stream.index,
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type: stream.codec_type,
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codec: stream.codec_name || null,
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codec_long: stream.codec_long_name || null,
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codec_time_base: stream.codec_time_base || null,
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time_base: stream.time_base || null,
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bit_rate: tryGrabBitRate(stream, all_streams, total_bit_rate),
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language: tryGrabTag(stream, 'language'),
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title: tryGrabTag(stream, 'title')
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}
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if (stream.tags) info.tags = stream.tags
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if (info.type === 'audio' || info.type === 'subtitle') {
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var disposition = stream.disposition || {}
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info.is_default = disposition.default === 1 || disposition.default === '1'
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}
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if (info.type === 'video') {
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info.profile = stream.profile || null
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info.is_avc = (stream.is_avc !== '0' && stream.is_avc !== 'false')
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info.pix_fmt = stream.pix_fmt || null
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info.frame_rate = tryGrabFrameRate(stream)
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info.width = !isNaN(stream.width) ? Number(stream.width) : null
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info.height = !isNaN(stream.height) ? Number(stream.height) : null
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info.color_range = stream.color_range || null
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info.color_space = stream.color_space || null
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info.color_transfer = stream.color_transfer || null
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info.color_primaries = stream.color_primaries || null
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} else if (stream.codec_type === 'audio') {
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info.channels = stream.channels || null
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info.sample_rate = tryGrabSampleRate(stream)
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info.channel_layout = tryGrabChannelLayout(stream)
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}
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return info
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}
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function isNullOrNaN(val) {
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return val === null || isNaN(val)
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}
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/* Example chapter object
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* {
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"id": 71,
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"time_base": "1/1000",
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"start": 80792671,
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"start_time": "80792.671000",
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"end": 81084755,
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"end_time": "81084.755000",
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"tags": {
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"title": "072"
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}
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* }
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*/
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function parseChapters(chapters) {
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if (!chapters) return []
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return chapters.map(chap => {
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var title = chap['TAG:title'] || chap.title || ''
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if (!title && chap.tags && chap.tags.title) title = chap.tags.title
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var timebase = chap.time_base && chap.time_base.includes('/') ? Number(chap.time_base.split('/')[1]) : 1
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var start = !isNullOrNaN(chap.start_time) ? Number(chap.start_time) : !isNullOrNaN(chap.start) ? Number(chap.start) / timebase : 0
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var end = !isNullOrNaN(chap.end_time) ? Number(chap.end_time) : !isNullOrNaN(chap.end) ? Number(chap.end) / timebase : 0
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return {
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id: chap.id,
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start,
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end,
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title
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}
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})
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}
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function parseTags(format, verbose) {
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if (!format.tags) {
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return {}
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}
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if (verbose) {
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Logger.debug('Tags', format.tags)
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}
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const tags = {
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file_tag_encoder: tryGrabTags(format, 'encoder', 'tsse', 'tss'),
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file_tag_encodedby: tryGrabTags(format, 'encoded_by', 'tenc', 'ten'),
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file_tag_title: tryGrabTags(format, 'title', 'tit2', 'tt2'),
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file_tag_subtitle: tryGrabTags(format, 'subtitle', 'tit3', 'tt3'),
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file_tag_track: tryGrabTags(format, 'track', 'trck', 'trk'),
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file_tag_disc: tryGrabTags(format, 'discnumber', 'disc', 'disk', 'tpos'),
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file_tag_album: tryGrabTags(format, 'album', 'talb', 'tal'),
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file_tag_artist: tryGrabTags(format, 'artist', 'tpe1', 'tp1'),
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file_tag_albumartist: tryGrabTags(format, 'albumartist', 'album_artist', 'tpe2'),
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file_tag_date: tryGrabTags(format, 'date', 'tyer', 'tye'),
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file_tag_composer: tryGrabTags(format, 'composer', 'tcom', 'tcm'),
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file_tag_publisher: tryGrabTags(format, 'publisher', 'tpub', 'tpb'),
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file_tag_comment: tryGrabTags(format, 'comment', 'comm', 'com'),
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file_tag_description: tryGrabTags(format, 'description', 'desc'),
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file_tag_genre: tryGrabTags(format, 'genre', 'tcon', 'tco'),
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file_tag_series: tryGrabTags(format, 'series', 'show'),
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file_tag_seriespart: tryGrabTags(format, 'series-part', 'episode_id'),
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file_tag_isbn: tryGrabTags(format, 'isbn'),
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file_tag_language: tryGrabTags(format, 'language', 'lang'),
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file_tag_asin: tryGrabTags(format, 'asin'),
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// Not sure if these are actually used yet or not
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file_tag_creation_time: tryGrabTags(format, 'creation_time'),
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file_tag_wwwaudiofile: tryGrabTags(format, 'wwwaudiofile', 'woaf', 'waf'),
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file_tag_contentgroup: tryGrabTags(format, 'contentgroup', 'tit1', 'tt1'),
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file_tag_releasetime: tryGrabTags(format, 'releasetime', 'tdrl'),
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file_tag_movementname: tryGrabTags(format, 'movementname', 'mvnm'),
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file_tag_movement: tryGrabTags(format, 'movement', 'mvin'),
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file_tag_genre1: tryGrabTags(format, 'tmp_genre1', 'genre1'),
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file_tag_genre2: tryGrabTags(format, 'tmp_genre2', 'genre2'),
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}
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for (const key in tags) {
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if (!tags[key]) {
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delete tags[key]
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}
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}
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// var keysToLookOutFor = ['file_tag_genre1', 'file_tag_genre2', 'file_tag_series', 'file_tag_seriespart', 'file_tag_movement', 'file_tag_movementname', 'file_tag_wwwaudiofile', 'file_tag_contentgroup', 'file_tag_releasetime', 'file_tag_isbn']
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// keysToLookOutFor.forEach((key) => {
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// if (tags[key]) {
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// Logger.debug(`Notable! ${key} => ${tags[key]}`)
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// }
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// })
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return tags
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}
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function getDefaultAudioStream(audioStreams) {
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if (!audioStreams || !audioStreams.length) return null
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if (audioStreams.length === 1) return audioStreams[0]
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var defaultStream = audioStreams.find(a => a.is_default)
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if (!defaultStream) return audioStreams[0]
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return defaultStream
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}
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function parseProbeData(data, verbose = false) {
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try {
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var { format, streams, chapters } = data
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var { format_long_name, duration, size, bit_rate } = format
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var sizeBytes = !isNaN(size) ? Number(size) : null
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var sizeMb = sizeBytes !== null ? Number((sizeBytes / (1024 * 1024)).toFixed(2)) : null
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// Logger.debug('Parsing Data for', Path.basename(format.filename))
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var tags = parseTags(format, verbose)
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var cleanedData = {
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format: format_long_name,
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duration: !isNaN(duration) ? Number(duration) : null,
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size: sizeBytes,
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sizeMb,
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bit_rate: !isNaN(bit_rate) ? Number(bit_rate) : null,
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...tags
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}
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if (verbose && format.tags) {
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cleanedData.rawTags = format.tags
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}
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const cleaned_streams = streams.map(s => parseMediaStreamInfo(s, streams, cleanedData.bit_rate))
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cleanedData.video_stream = cleaned_streams.find(s => s.type === 'video')
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var audioStreams = cleaned_streams.filter(s => s.type === 'audio')
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cleanedData.audio_stream = getDefaultAudioStream(audioStreams)
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if (cleanedData.audio_stream && cleanedData.video_stream) {
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var videoBitrate = cleanedData.video_stream.bit_rate
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// If audio stream bitrate larger then video, most likely incorrect
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if (cleanedData.audio_stream.bit_rate > videoBitrate) {
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cleanedData.video_stream.bit_rate = cleanedData.bit_rate
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}
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}
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// If format does not have tags, check audio stream (https://github.com/advplyr/audiobookshelf/issues/256)
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if (!format.tags && cleanedData.audio_stream && cleanedData.audio_stream.tags) {
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var tags = parseTags(cleanedData.audio_stream)
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cleanedData = {
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...cleanedData,
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...tags
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}
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}
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cleanedData.chapters = parseChapters(chapters)
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return cleanedData
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} catch (error) {
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console.error('Parse failed', error)
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return null
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}
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}
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// Updated probe returns MediaProbeData object
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function probe(filepath, verbose = false) {
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if (process.env.FFPROBE_PATH) {
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ffprobe.FFPROBE_PATH = process.env.FFPROBE_PATH
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}
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return ffprobe(filepath)
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.then(raw => {
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var rawProbeData = parseProbeData(raw, verbose)
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if (!rawProbeData || (!rawProbeData.audio_stream && !rawProbeData.video_stream)) {
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return {
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error: rawProbeData ? 'Invalid media file: no audio or video streams found' : 'Probe Failed'
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}
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} else {
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var probeData = new MediaProbeData()
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probeData.setData(rawProbeData)
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return probeData
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}
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})
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.catch((err) => {
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return {
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error: err
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}
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})
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}
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module.exports.probe = probe
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