HaveAGitGat
6 years ago
parent
32b8d73e0f
commit
cea3c377bf
@ -0,0 +1,365 @@
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module.exports = function transcodeKeepOneAudioStream(file, audioEncoder, langTag, channelCount) {
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// response.preset = library.actions.transcodeKeepOneAudioStream(file, 'aac', 'en', 1).preset
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//Function required responses
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// preset
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// processFile
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// note
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try {
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var audioCodec = audioEncoder
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langTag = langTag.toLowerCase()
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if (audioEncoder == 'dca') {
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audioCodec = 'dts'
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}
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if (audioEncoder == 'libmp3lame') {
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audioCodec = 'mp3'
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}
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var reqLang = langTag
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var numberOfAudioStreams = file.ffProbeData.streams.filter(stream => stream.codec_type == 'audio').length
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//Step 1: Check if the file already has the required stream codec/langtag/channel count
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var hasStreamAlready = file.ffProbeData.streams.filter(stream => {
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try {
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if (stream.codec_type == 'audio' && stream.codec_name === audioCodec && stream.tags.language.toLowerCase().includes(langTag.toLowerCase()) && stream.channels == channelCount) {
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return true
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}
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} catch (err) { }
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return false
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})
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if (numberOfAudioStreams == 1 && hasStreamAlready.length == 1) {
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return {
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preset: '',
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processFile: false,
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note: `File already has ${langTag} stream in ${audioEncoder}, ${channelCount} channels. It is the only track! \n`
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}
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} else if (hasStreamAlready.length >= 1) {
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var audioStreamToKeep = hasStreamAlready[0].index
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var ffmpegCommandInsert = ''
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for (var i = 0; i < file.ffProbeData.streams.length; i++) {
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try {
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if (file.ffProbeData.streams[i].codec_type.toLowerCase() == "audio" && i !== audioStreamToKeep) {
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ffmpegCommandInsert += ` -map -0:a:${i}`
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}
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} catch (err) { }
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}
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return {
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preset: `, -map 0 ${ffmpegCommandInsert} -c copy`,
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processFile: true,
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note: `File already has ${langTag} stream in ${audioEncoder}, ${channelCount} channels. It is not the only track, removing others. \n`
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}
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}
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//Step 2: Check if file has streams with specified lang tag
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var streamsWithLangTag = file.ffProbeData.streams.filter(stream => {
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try {
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if (stream.codec_type == 'audio' && stream.tags.language.toLowerCase().includes(langTag)) {
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return true
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}
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} catch (err) { }
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return false
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})
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console.log("streamsWithLangTag:" + streamsWithLangTag)
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if (streamsWithLangTag.length != 0) {
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return attemptMakeStreamLang(langTag)
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} else {
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return attemptMakeStreamUnd('und')
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}
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function attemptMakeStreamLang(langTag) {
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var streamsWithLangTag = file.ffProbeData.streams.filter(stream => {
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try {
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if (stream.codec_type == 'audio' && stream.tags.language.toLowerCase().includes(langTag)) {
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return true
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}
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} catch (err) { }
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return false
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})
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var highestChannelCount = streamsWithLangTag.reduce(getHighest)
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function getHighest(first, second) {
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if (first.channels > second.channels && first) {
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return first
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} else {
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return second
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}
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}
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if (parseInt(highestChannelCount.channels) >= parseInt(channelCount)) {
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var hasStreamAlready = file.ffProbeData.streams.filter(stream => {
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try {
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if (stream.codec_type == 'audio' && stream.codec_name === audioCodec && stream.tags.language.toLowerCase().includes(langTag.toLowerCase()) && stream.channels == channelCount) {
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return true
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}
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} catch (err) { }
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return false
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})
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if (numberOfAudioStreams == 1 && hasStreamAlready.length == 1) {
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return {
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preset: '',
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processFile: false,
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note: `The required stream already exists. It is the only audio stream. \n`
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}
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} else if (hasStreamAlready.length >= 1) {
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return {
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preset: `,-map 0:v -map 0:${hasStreamAlready[0].index} -map 0:s? -map 0:d? -c copy`,
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processFile: true,
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note: `The required stream already exists. Removing others. \n`
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}
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} else {
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return {
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preset: `,-map 0:v -map 0:${highestChannelCount.index} -map 0:s? -map 0:d? -c copy -c:a:0 ${audioEncoder} -ac ${channelCount}`,
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processFile: true,
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note: `The required channel count ${channelCount} is lower than the highest available channel count (${highestChannelCount.channels}). Adding it and removing others! \n`
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}
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}
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} else {
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console.log('here3')
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var hasStreamAlready = file.ffProbeData.streams.filter(stream => {
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try {
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if (stream.codec_type == 'audio' && stream.codec_name === audioCodec && stream.tags.language.toLowerCase().includes(langTag.toLowerCase()) && stream.channels == highestChannelCount.channels) {
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return true
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}
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} catch (err) { }
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return false
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})
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if (numberOfAudioStreams == 1 && hasStreamAlready.length == 1) {
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return {
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preset: '',
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processFile: false,
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note: `The best ${reqLang} stream already exists. It is the only audio stream. \n`
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}
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} else if (hasStreamAlready.length >= 1) {
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return {
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preset: `,-map 0:v -map 0:${hasStreamAlready[0].index} -map 0:s? -map 0:d? -c copy`,
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processFile: true,
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note: `The best ${reqLang} stream already exists. Removing others. \n`
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}
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} else {
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return {
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preset: `,-map 0:v -map 0:${highestChannelCount.index} -map 0:s? -map 0:d? -c copy -c:a:0 ${audioEncoder} -ac ${highestChannelCount.channels}`,
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processFile: true,
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note: `The required channel count (${channelCount}) is higher than the highest channel available in specified lang tag (${highestChannelCount.channels}). Adding lower channel track, removing others. \n`
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}
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}
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}
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}
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function attemptMakeStreamUnd(langTag) {
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console.log('No tracks with specified lang tag exist. Checking undefined tracks.')
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console.log(langTag)
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var streamsWithLangTag = file.ffProbeData.streams.filter(stream => {
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try {
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if (stream.codec_type == 'audio' && (stream.tags == undefined || stream.tags.language == undefined || stream.tags.language.toLowerCase().includes(langTag))) {
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return true
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}
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} catch (err) { }
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return false
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})
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if (streamsWithLangTag.length == 0) {
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return {
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preset: ``,
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processFile: false,
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note: `Unable to add audio stream in ${langTag}/und with ${channelCount} channels \n`
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}
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}
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var highestChannelCount = streamsWithLangTag.reduce(getHighest)
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function getHighest(first, second) {
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if (first.channels > second.channels && first) {
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return first
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} else {
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return second
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}
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}
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if (parseInt(highestChannelCount.channels) >= parseInt(channelCount)) {
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var hasStreamAlready = file.ffProbeData.streams.filter(stream => {
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try {
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if (stream.codec_type == 'audio' && stream.codec_name === audioCodec && (stream.tags == undefined || stream.tags.language == undefined || stream.tags.language.toLowerCase().includes(langTag)) && stream.channels == channelCount) {
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return true
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}
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} catch (err) { }
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return false
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})
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if (numberOfAudioStreams == 1 && hasStreamAlready.length == 1) {
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return {
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preset: '',
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processFile: false,
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note: `No ${reqLang} streams. The required und stream already exists. It is the only audio stream. \n`
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}
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} else if (hasStreamAlready.length >= 1) {
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return {
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preset: `,-map 0:v -map 0:${hasStreamAlready[0].index} -map 0:s? -map 0:d? -c copy`,
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processFile: true,
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note: `No ${reqLang} streams. The required und stream already exists. Removing others. \n`
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}
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} else {
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return {
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preset: `,-map 0:v -map 0:${highestChannelCount.index} -map 0:s? -map 0:d? -c copy -c:a:0 ${audioEncoder} -ac ${channelCount}`,
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processFile: true,
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note: `No ${reqLang} streams. The required channel count ${channelCount} is lower than the highest available channel count (${highestChannelCount.channels}).Adding it and removing others! \n`
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}
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}
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} else {
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var hasStreamAlready = file.ffProbeData.streams.filter(stream => {
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try {
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if (stream.codec_type == 'audio' && stream.codec_name === audioCodec && (stream.tags == undefined || stream.tags.language == undefined || stream.tags.language.toLowerCase().includes(langTag)) && stream.channels == highestChannelCount.channels) {
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return true
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}
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} catch (err) { }
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return false
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})
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if (numberOfAudioStreams == 1 && hasStreamAlready.length == 1) {
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return {
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preset: '',
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processFile: false,
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note: `No ${reqLang} streams. The best und stream already exists. It is the only audio stream. \n`
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}
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} else if (hasStreamAlready.length >= 1) {
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return {
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preset: `,-map 0:v -map 0:${hasStreamAlready[0].index} -map 0:s? -map 0:d? -c copy`,
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processFile: true,
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note: `No ${reqLang} streams. The best stream already exists. Removing others. \n`
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}
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} else {
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return {
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preset: `,-map 0:v -map 0:${highestChannelCount.index} -map 0:s? -map 0:d? -c copy -c:a:0 ${audioEncoder} -ac ${highestChannelCount.channels}`,
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processFile: true,
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note: `No ${reqLang} streams. The required channel count (${channelCount}) is higher than the highest channel available in specified lang tag (${highestChannelCount.channels}). Adding lower channel track, removing others. \n`
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}
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}
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}
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}
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} catch (err) {
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return {
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preset: '',
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processFile: false,
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note: `library.actions.transcodeKeepOneAudioStream error: ${err} \n`
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}
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}
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}
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