const details = () => ({
  id: 'Tdarr_Plugin_MM1_MrMeeb_Full_Stack',
  Stage: 'Pre-processing',
  Name: 'MrMeeb Full Stack Processing',
  Type: 'Video',
  Operation: 'Transcode',
  Description: 'Automatically removes TrueHD and replaces with a suitable AC3 5.1 track, either pre-existing or created.\n Removes non-English and non-German subtitles.\n Transcodes x264 content to HEVC using NVENC, with a focus on quality',
  Version: '0.1',
  Tags: 'pre-processing',
  Inputs: [      
    {
      name: 'process_video',
      type: 'boolean',         
      defaultValue: true,  
      inputUI: {
        type: 'dropdown',
        options: [
          'true',
          'false',
        ],
      },
      tooltip: `Select whether to process video, or just copy over`,
    },
    {
      name: 'process_audio',
      type: 'boolean',         
      defaultValue: true,  
      inputUI: {
        type: 'dropdown',
        options: [
          'true',
          'false',
        ],
      },
      tooltip: `Select whether to process audio, or just copy over`,
    },
    {
      name: 'process_subs',
      type: 'boolean',         
      defaultValue: true,  
      inputUI: {
        type: 'dropdown',
        options: [
         'true',
          'false',
        ],
      },
      tooltip: `Select whether to process subs, or just copy over`,
    },
    {
      name: 'remove_commentary',
      type: 'boolean',         
      defaultValue: true,  
      inputUI: {
        type: 'dropdown',
        options: [
         'true',
          'false',
        ],
      },
      tooltip: `Select whether to remove commentary audio and subtitle tracks`,
    },
    {
      name: 'crf',
      type: 'string',          // set the data type of the input ('string', 'number', 'boolean')
      defaultValue: '19',     // set the default value of the input incase the user enters no input
      inputUI: {
        type: 'text',          // specify how the input UI will appear to the user ('text' or 'dropdown')
      },
      tooltip: `Enter CRF value used for video transcoding.`,
    },
  ],
});




// eslint-disable-next-line no-unused-vars
const plugin = (file, librarySettings, inputs, otherArguments) => {

const lib = require('../methods/lib')();
// load default plugin inputs
inputs = lib.loadDefaultValues(inputs, details);

// Load response object
const response = {
    processFile: false, // If set to false, the file will be skipped. Set to true to have the file transcoded.
    preset: '', // HandBrake/FFmpeg CLI arguments you'd like to use.
    // For FFmpeg, the input arguments come first followed by <io>, followed by the output argument.
    // Examples
    // HandBrake
    // '-Z "Very Fast 1080p30"'
    // FFmpeg
    // '-sn <io> -map_metadata -1 -c:v copy -c:a copy'
    container: '.mp4', // The container of the transcoded output file.
    handBrakeMode: false, // Set whether to use HandBrake or FFmpeg for transcoding
    FFmpegMode: false,
    infoLog: '', // This will be shown when the user clicks the 'i' (info) button on a file in the output queue if
    // it has been skipped.
    // Give reasons why it has been skipped ('File has no title metadata, File meets conditions!')

    // Optional (include together)
    //file,
    //removeFromDB: false, // Tell Tdarr to remove file from database if true
    //updateDB: false, // Change file object above and update database if true
  };   

  // Required global variables for functions
  let ffmpegAudioFirstTrack = '';
  let ffmpegAudioOtherTracks = '';
  let ffmpegSubs = '';
  let ffmpegVideo = '';

  // Defining functions

  const processAudio = (file, librarySettings, inputs, otherArguments) => {

    if (inputs.process_audio == false) {

      response.infoLog += `Processing audio set to skip. Copying all present tracks over.\n`

    }

    else {

      // Function variables
      let audioIdx = -1;
      let audioIdxTruehd = -1;
      let trueHD = -1;
      let trueHDi = -1;
      let audioIdxDtshdma = -1;
      let dtshdma = -1;
      let dtshdmai = -1;
      let ac3Count = 0;
      let dtsHandled = 0;
    
      console.log(` === Running processAudio function === `)
    
      // Go through all streams, hunting for TrueHD/DTS-HD MA
      for (let i = 0; i < file.ffProbeData.streams.length; i ++) {
    
        // Work with audio streams only
        if (file.ffProbeData.streams[i].codec_type.toLowerCase() === 'audio') {
    
          let MMCodec = file.ffProbeData.streams[i].codec_name.toUpperCase();
          let MMChannelLayout = file.ffProbeData.streams[i].channel_layout.replace('(side)', '');
    
          //console.log(`Stream ${i} is an audio stream`);
    
          // Keep track of audio stream relative numbers
          try {
            if (file.ffProbeData.streams[i].codec_type.toLowerCase() == "audio") {
              audioIdx++;
            }
          } catch (err) {}

          // Identify wanted tracks
          try {
    
            // Identify if stream is TrueHD
            if (file.ffProbeData.streams[i].codec_name.toLowerCase() === 'truehd') {
    
              console.log(`Stream ${i} (audio stream ${audioIdx}) is TrueHD. Commencing TrueHD handling process`);
              response.infoLog += `Stream ${i} (audio stream ${audioIdx}) is TrueHD. Commencing TrueHD handling process.\n`
    
              trueHD = audioIdx;
              trueHDi = i;
              let trueHDLang = file.ffProbeData.streams[i].tags.language
              let trueHDReplacementCount = 0
    
              // Look for a suitable AC3 5.1 track to replace it
    
              for (let i = 0; i < file.ffProbeData.streams.length; i ++) {
    
                if (file.ffProbeData.streams[i].codec_type.toLowerCase() === 'audio') {
                  
                  audioIdxTruehd++;
                  MMCodec = file.ffProbeData.streams[i].codec_name.toUpperCase();
                  MMChannelLayout = file.ffProbeData.streams[i].channel_layout.replace('(side)', '');
    
                  try {
    
                    if (
                      (file.ffProbeData.streams[i].tags.title != undefined && 
                      file.ffProbeData.streams[i].tags.title.toLowerCase().includes("commentary") || 
                      file.ffProbeData.streams[i].disposition.comment == 1) &&
                      inputs.remove_commentary == true
                    ) {
      
                      console.log(`Stream ${i} (audio stream ${audioIdxTruehd}) is probably a commentary track. Selected to remove.`)
                      response.infoLog += `Stream ${i} (audio stream ${audioIdxTruehd}) is probably a commentary track. Selected to remove.\n`
      
                    }

                    else if (
                      (file.ffProbeData.streams[i].tags.title != undefined && 
                      file.ffProbeData.streams[i].tags.title.toLowerCase().includes("commentary") || 
                      file.ffProbeData.streams[i].disposition.comment == 1) &&
                      inputs.remove_commentary == false
                    ) {
      
                      console.log(`Stream ${i} (audio stream ${audioIdxTruehd}) is probably a commentary track. Selected to keep.`)
                      response.infoLog += `Stream ${i} (audio stream ${audioIdxTruehd}) is probably a commentary track. Selected to keep.\n`
                      ffmpegAudioOtherTracks += ` -map 0:a:${audioIdxTruehd}`
      
                    }
                    
                    // Identify if stream is AC3 5.1
                    else if (
                      file.ffProbeData.streams[i].codec_name.toLowerCase() === 'ac3' &&
                      file.ffProbeData.streams[i].channels === 6 &&
                      file.ffProbeData.streams[i].tags.language === trueHDLang
                    ) {
    
                      console.log(`Stream ${i} (audio stream ${audioIdxTruehd}) is AC3 5.1 and in matching language. Suitable replacement.`);
                      console.log(`${MMCodec} <- Should be AC3`)

                      response.infoLog += `Stream ${i} (audio stream ${audioIdxTruehd}) is AC3 5.1 and in matching language. Suitable replacement.\n`
                      response.infoLog +=`${MMCodec} <- Should be AC3\n`
    
                      trueHDReplacementCount++
    
                      if (trueHDReplacementCount <= 1) {
                        
                        ffmpegAudioFirstTrack = ` -map -0:a -map 0:a:${audioIdxTruehd} -metadata:s:a:0 "title=${MMCodec} - ${MMChannelLayout} - MM" -disposition:a:0 default`
    
                      }
                      else {
    
                        console.log('More than 1 suitable AC3 5.1 track has been detected - something has probably gone wrong in detection of commentary tracks. The first found track will be kept')
                        response.infoLog += 'More than 1 suitable AC3 5.1 track has been detected - something has probably gone wrong in detection of commentary tracks. The first found track will be kept\n'
    
                      }
    
    
                    }
    
                    else if (                  
                      file.ffProbeData.streams[i].codec_name.toLowerCase() === 'ac3' &&
                      file.ffProbeData.streams[i].channels === 6 &&
                      file.ffProbeData.streams[i].tags.language !== trueHDLang &&
                      file.ffProbeData.streams[i].tags.language.toLowerCase() == 'eng'
                    ) {
    
                      console.log(`Stream ${i} (audio stream ${audioIdxTruehd}) is AC3 5.1. It does not match the native language of the movie, but is in English. Probably want to keep.`);
                      response.infoLog += `Stream ${i} (audio stream ${audioIdxTruehd}) is AC3 5.1. It does not match the native language of the movie, but is in English. Probably want to keep.\n`
    
                      ffmpegAudioOtherTracks += ` -map 0:a:${audioIdxTruehd}`
    
                    }
    
                    else if (file.ffProbeData.streams[i].codec_name.toLowerCase() !== 'truehd') {
    
                      console.log(`Stream ${i} (audio stream ${audioIdxTruehd}) isn't AC3 5.1, and TrueHD is already available to create an AC3 5.1 track if not present. Removing.`)
                      response.infoLog += `Stream ${i} (audio stream ${audioIdxTruehd}) isn't AC3 5.1, and TrueHD is already available to create an AC3 5.1 track if not present. Removing.\n`

                    }; 
    
                  } catch (error) {
                    
                  }
    
                };            
    
              };
    
              if (trueHDReplacementCount = 0) {
    
                  console.log('A suitable TrueHD replacement track is not available. Creating my own.')
                  //console.log(`${MMCodec} <- Should be AC3`)
    

                  if (file.ffProbeData.streams[trueHDi].channels > 6) {

                    response.infoLog += 'TrueHD track exists, but no AC3 compatibility track is present. Creating one, and downmixing to 6 channels.\n'

                    ffmpegAudioFirstTrack = ` -map -0:a -map 0:a:${trueHD} -c:a:0 ac3 -b:a:0 640k -ac:a:0 6 -metadata:s:a:0 "title=AC3 - 5.1 - MM" -disposition:a:0 default`

                  }
                  else {

                    response.infoLog += 'TrueHD track exists, but no AC3 compatibility track is present. Creating one.\n'

                    ffmpegAudioFirstTrack = ` -map -0:a -map 0:a:${trueHD} -c:a:0 ac3 -b:a:0 640k -ac:a:0 ${file.ffProbeData.streams[trueHDi].channels} -metadata:s:a:0 "title=AC3 - 5.1 - MM" -disposition:a:0 default`

                  }
            
    
              }
    
            }
    
            // Identify if stream is DTS-HD MA
            if (file.ffProbeData.streams[i].profile != undefined && file.ffProbeData.streams[i].profile.toLowerCase() === 'dts-hd ma') {
    
              // Check if DTS-HD MA has already been handled by a previous run
              // Assume that it will be the second stream (first audio stream) - it should be, if already handled
              MMChannelLayout = file.ffProbeData.streams[i].channel_layout.replace('(side)', ''); // Have to declare this here to make the if statement work. Leaving it in place further down as well

              if (file.ffProbeData.streams[i].tags.title === `DTS-HD MA - ${MMChannelLayout} - MM`) {

                console.log(`Stream ${i} (audio stream ${audioIdx}) is DTS-HD MA and has already been handled. Safe to assume this file has already been treated.`);
                response.infoLog += `Stream ${i} (audio stream ${audioIdx}) is DTS-HD MA and has already been handled. Safe to assume this file has already been treated.\n`

                // Mark DTS-HD MA handling process as complete causing everything else audio-related to be skipped
                dtsHandled = 1

              } else {

                console.log(`Stream ${i} (audio stream ${audioIdx}) is DTS-HD MA and has not been handled. Commencing DTS-HD MA handling process`);
                response.infoLog += `Stream ${i} (audio stream ${audioIdx}) is DTS-HD MA. Commencing DTS-HD MA handling process.\n`
  
              };
    
              dtshdma = audioIdx; // Index of DTS-HD MA track relative to other audio tracks
              dtshdmai = i; // Index of DTS-HD MA track within all tracks (audio, video, subs, etc)
              let dtshdmaLang = file.ffProbeData.streams[i].tags.language // Language of DTS-HD MA track
              let dtshdmaReplacementCount = 0 // Number of DTS-HD MA replacement candidates
    
              // Look if there is a suitable AC3 5.1 track to use alongside it
    
              for (let i = 0; i < file.ffProbeData.streams.length; i ++) { // Iterate through all streams
    
                if (dtsHandled == 0 && file.ffProbeData.streams[i].codec_type.toLowerCase() === 'audio') { // If the stream is an audio stream
                  
                  audioIdxDtshdma++; // Index of replacement track
                  MMCodec = file.ffProbeData.streams[i].codec_name.toUpperCase();
                  MMChannelLayout = file.ffProbeData.streams[i].channel_layout.replace('(side)', '');
    
                  try {
                    
                    // Identify if stream is commentary track
                    if (
                      (file.ffProbeData.streams[i].tags.title != undefined && 
                      file.ffProbeData.streams[i].tags.title.toLowerCase().includes("commentary") || 
                      file.ffProbeData.streams[i].disposition.comment == 1) &&
                      inputs.remove_commentary == true
                    ) {
      
                      console.log(`Stream ${i} (audio stream ${audioIdxDtshdma}) is probably a commentary track. Selected to remove.`)
                      response.infoLog += `Stream ${i} (audio stream ${audioIdxDtshdma}) is probably a commentary track. Selected to remove.\n`
      
                    }

                    else if (
                      (file.ffProbeData.streams[i].tags.title != undefined && 
                      file.ffProbeData.streams[i].tags.title.toLowerCase().includes("commentary") || 
                      file.ffProbeData.streams[i].disposition.comment == 1) &&
                      inputs.remove_commentary == false
                    ) {
      
                      console.log(`Stream ${i} (audio stream ${audioIdxTruehd}) is probably a commentary track. Selected to keep.`)
                      response.infoLog += `Stream ${i} (audio stream ${audioIdxTruehd}) is probably a commentary track. Selected to keep.\n`
                      ffmpegAudioOtherTracks += ` -map 0:a:${audioIdxTruehd}`
      
                    }
                    
                    // Identify if stream is AC3 5.1
                    else if (
                      file.ffProbeData.streams[i].codec_name.toLowerCase() === 'ac3' && // is codec AC3
                      file.ffProbeData.streams[i].channels === 6 && // does it have 6 channels (5.1)
                      file.ffProbeData.streams[i].tags.language === dtshdmaLang // does it have the same language as the DTS-HD MA track
                    ) {
    
                      console.log(`Stream ${i} (audio stream ${audioIdxDtshdma}) is AC3 5.1 and in matching language. Keeping alongside the DTS-HD MA track.`);
                      console.log(`${MMCodec} <- Should be AC3`)

                      response.infoLog += `Stream ${i} (audio stream ${audioIdxDtshdma}) is AC3 5.1 and in matching language. Keeping alongside the DTS-HD MA track.\n`
                      response.infoLog +=`${MMCodec} <- Should be AC3\n`
    
                      dtshdmaReplacementCount++ // Add to the DTS-HD MA replacement count
    
                      if (dtshdmaReplacementCount <= 1) { // If we found a single DTS-HD MA replacement...
                        
                        ffmpegAudioFirstTrack = ` -map -0:a -map 0:a:${dtshdma} -metadata:s:a:0 "title=DTS-HD MA - ${MMChannelLayout} - MM" -disposition:a:0 default -map 0:a:${audioIdxDtshdma} -metadata:s:a:1 "title=${MMCodec} - ${MMChannelLayout} - MM"` // Keep both the DTS-HD MA and AC3 tracks, label them
    
                      }
                      else {
    
                        console.log('More than 1 suitable AC3 5.1 track has been detected - something has probably gone wrong in detection of commentary tracks. The first found track will be kept')
                        response.infoLog += 'More than 1 suitable AC3 5.1 track has been detected - something has probably gone wrong in detection of commentary tracks. The first found track will be kept\n'
    
                      }
    
    
                    }
    
                    else if (                  
                      file.ffProbeData.streams[i].codec_name.toLowerCase() === 'ac3' && // is codec AC3
                      file.ffProbeData.streams[i].channels === 6 && // does it have 6 channels (5.1)
                      file.ffProbeData.streams[i].tags.language !== dtshdmaLang && // does it NOT match the language of the DTS-HD MA track
                      file.ffProbeData.streams[i].tags.language.toLowerCase() == 'eng' // is the AC3 track in English
                    ) {
    
                      console.log(`Stream ${i} (audio stream ${audioIdxDtshdma}) is AC3 5.1. It does not match the native language of the movie, but is in English. Probably want to keep.`);
                      response.infoLog += `Stream ${i} (audio stream ${audioIdxDtshdma}) is AC3 5.1. It does not match the native language of the movie, but is in English. Probably want to keep.\n`
    
                      ffmpegAudioOtherTracks += ` -map 0:a:${audioIdxDtshdma}` // Add the track to the list of additional tracks
    
                    }
    
                    else if (file.ffProbeData.streams[i].codec_name.toLowerCase() !== 'dts') { // Remove any track that isn't AC3 since we already have DTS-HD MA to work with
    
                      console.log(`Stream ${i} (audio stream ${audioIdxDtshdma}) isn't AC3 5.1, and DTS-HD MA is already available to create an AC3 5.1 track if not present. Removing.`)
                      response.infoLog += `Stream ${i} (audio stream ${audioIdxDtshdma}) isn't AC3 5.1, and DTS-HD MA is already available to create an AC3 5.1 track if not present. Removing.\n`

                    };
    
                  } catch (error) {
                    
                  }
    
                };            
    
              };
    
              if (dtsHandled == 0 && dtshdmaReplacementCount == 0) { // If we didn't find a replacement candidate
    
                  console.log('A suitable DTS-HD MA replacement track is not available. Creating my own.')
                  //console.log(`${MMCodec} <- Should be AC3`)
    

                  if (file.ffProbeData.streams[dtshdmai].channels > 6) { // If the DTS-HD MA track has more than 6 channels, downmix to 6 channels

                    response.infoLog += 'DTS-HD MA track exists, but no AC3 compatibility track is present. Creating one, and downmixing to 6 channels.\n'

                    ffmpegAudioFirstTrack = ` -map -0:a -map 0:a:${dtshdma} -metadata:s:a:0 "title=DTS-HD MA - ${MMChannelLayout} - MM" -disposition:a:0 default -map 0:a:${dtshdma} -c:a:1 ac3 -b:a:1 640k -ac:a:1 6 -metadata:s:a:1 "title=AC3 - 5.1 - MM"`

                  }
                  else { // Otherwise, create an AC3 track with the same channel layout

                    response.infoLog += 'DTS-HD MA track exists, but no AC3 compatibility track is present. Creating one.\n'

                    ffmpegAudioFirstTrack = ` -map -0:a -map 0:a:${dtshdma} -metadata:s:a:0 "title=DTS-HD MA - ${MMChannelLayout} - MM" -disposition:a:0 default -map 0:a:${dtshdma} -c:a:1 ac3 -b:a:1 640k -ac:a:1 ${file.ffProbeData.streams[dtshdmai].channels} -metadata:s:a:1 "title=AC3 - 5.1 - MM"`

                  }
            
    
              }
              
              // Mark DTS-HD MA handling process as complete, skipping the logic for no THD/DTS-HD MA. Was already set if the run had completed before.
              dtsHandled = 1

            }

          } catch (error) {
            console.log(error)
          }
    
        }
    
      };
      
      // Logic for if no TrueHD/DTS-HD MA track present
      if (trueHD < 0 && dtsHandled == 0) {
    
        console.log('No TrueHD track is present in the file.')
        response.infoLog += `No TrueHD track is present.\n`
        audioIdx = -1
    
        for (let i = 0; i < file.ffProbeData.streams.length; i ++) {
    
          // Work with audio streams only
          if (file.ffProbeData.streams[i].codec_type.toLowerCase() === 'audio') {
    
            //console.log(`Stream ${i} is an audio stream`);
    
            // Keep track of audio stream relative numbers
            try {
              if (file.ffProbeData.streams[i].codec_type.toLowerCase() == "audio") {
                audioIdx++;
              }
            } catch (err) {}
    
            try {
              // Try to identify commentary tracks
              if (
                (file.ffProbeData.streams[i].tags.title != undefined && 
                file.ffProbeData.streams[i].tags.title.toLowerCase().includes("commentary") || 
                file.ffProbeData.streams[i].disposition.comment == 1) &&
                inputs.remove_commentary == true
              ) {
    
                console.log(`Stream ${i} (audio stream ${audioIdx}) is probably a commentary track. Selected to remove`)
                response.infoLog += `Stream ${i} (audio stream ${audioIdx}) is probably a commentary track. Selected to remove.\n`
    
              }

              else if (
                (file.ffProbeData.streams[i].tags.title != undefined && 
                file.ffProbeData.streams[i].tags.title.toLowerCase().includes("commentary") || 
                file.ffProbeData.streams[i].disposition.comment == 1) &&
                inputs.remove_commentary == false
              ) {

                console.log(`Stream ${i} (audio stream ${audioIdx}) is probably a commentary track. Selected to keep.`)
                response.infoLog += `Stream ${i} (audio stream ${audioIdx}) is probably a commentary track. Selected to keep.\n`
                ffmpegAudioOtherTracks += ` -map 0:a:${audioIdx}`

              }
    
              else if (
                file.ffProbeData.streams[i].codec_name.toLowerCase() === 'ac3' &&
                file.ffProbeData.streams[i].channels == 6
              ) {
    
                console.log(`Stream ${i} (audio stream ${audioIdx}) is an AC3 5.1 track`)
                response.infoLog += `Stream ${i} (audio stream ${audioIdx}) is an AC3 5.1 track.\n`
                ac3Count++
                //console.log(`ac3Count = ${ac3Count}`)
    
              }
    
              //console.log(`codec_type = ${file.ffProbeData.streams[i].codec_name.toLowerCase()}`)
              //console.log(`channels = ${file.ffProbeData.streams[i].channels == 6}`)
              //console.log(`ac3Count = ${ac3Count}`)
    
            } catch (error) {
              
            }
              
          }
    
        }
    
        if (ac3Count == 0) {

          //LOGIC NEEDS ADDING FOR IF AN AC3 TRACK HAS BEEN CREATED WITH FEWER THAN 6 CHANNELS
    
          console.log(`Neither a TrueHD track nor a desireable AC3 5.1 track exist. Selecting the first audio track and converting it to AC3.`)
          response.infoLog += 'Neither a TrueHD track nor a desireable AC3 5.1 track exist. Selecting the first audio track and converting it to AC3.\n'
    
          if (file.ffProbeData.streams[1].codec_type.toLowerCase() === 'audio') {
    
            let MMCodec = file.ffProbeData.streams[1].codec_name.toUpperCase();
            let MMChannelLayout = file.ffProbeData.streams[1].channel_layout.replace('(side)', '');
            console.log(`Assuming stream 2 will be the best audio track available.`)
    
            console.log(`Stream 2 is ${file.ffProbeData.streams[1].codec_name} with ${file.ffProbeData.streams[1].channels} channels.`)
            response.infoLog += `Stream 2 is ${file.ffProbeData.streams[1].codec_name} with ${file.ffProbeData.streams[1].channels} channels.\n`
            
            if ( file.ffProbeData.streams[1].channels > 6 ) {

              ffmpegAudioFirstTrack = ` -map -0:a -map 0:a:0 -c:a:0 ac3 -b:a:0 640k -ac:a:0 6 -metadata:s:a:0 "title=AC3 - 5.1 - MM" -disposition:a:0 default`

            }
            else {

              ffmpegAudioFirstTrack = ` -map -0:a -map 0:a:0 -c:a:0 ac3 -b:a:0 640k -ac:a:0 ${file.ffProbeData.streams[1].channels} -metadata:s:a:0 "title=AC3 - ${MMChannelLayout} - MM" -disposition:a:0 default`

            }            
    
          }
    
          else {
    
            console.log(`Stream 2 isn't an audio track. Taking no action.`)
            response.infoLog += `☒ Stream 2 isn't an audio track. Taking no action.\n`
    
          };
    
        }
    
        if (ac3Count == 1) {
    
          audioIdx = -1;
    
          console.log(`Only 1 AC3 5.1 track present, checking to see if it's correctly labelled`)
          response.infoLog += `Only 1 AC3 5.1 track present, checking to see if it's correctly labelled.\n`
    
          for (let i = 0; i < file.ffProbeData.streams.length; i ++) {
    
            // Work with audio streams only
            if (file.ffProbeData.streams[i].codec_type.toLowerCase() === 'audio') {
    
              //console.log(`Stream ${i} is an audio stream`);
              let MMCodec = file.ffProbeData.streams[i].codec_name.toUpperCase();
              let MMChannelLayout = file.ffProbeData.streams[i].channel_layout.replace('(side)', '');
    
              // Keep track of audio stream relative numbers
              try {
                if (file.ffProbeData.streams[i].codec_type.toLowerCase() == "audio") {
                  audioIdx++;
                  //console.log(`audioIdx = ${audioIdx}`)
                }
              } catch (err) {}
        
              // Look only for AC3 5.1 streams (should only find 1)
              if (
                file.ffProbeData.streams[i].codec_name.toLowerCase() == "ac3" &&
                file.ffProbeData.streams[i].channels == 6
              ) {
    
                // Checking if AC3 5.1 already default and labelled - sign the file has probably already been processed
                if (
                  file.ffProbeData.streams[i].disposition.default = 1 && 
                  file.ffProbeData.streams[i].tags.title === `${MMCodec} - ${MMChannelLayout} - MM`
                ) {
          
                  console.log('Track is labelled correctly. No further work required.')
                  response.infoLog += '☑ Track is labelled correctly. No further work required.\n'
          
                }
          
                // Checking if AC3 5.1 exists but not labelled correctly
                else if (
                  file.ffProbeData.streams[i].disposition.default != 1 || 
                  file.ffProbeData.streams[i].tags.title !== `${MMCodec} - ${MMChannelLayout} - MM`
                ) {
          
                  console.log(`Stream ${i} (audio stream ${audioIdx}) is AC3 5.1, but not labelled correctly. Correcting.`)
                  response.infoLog += `Stream ${i} (audio stream ${audioIdx}) is AC3 5.1, but not labelled correctly. Correcting.\n`
                  ffmpegAudioFirstTrack = ` -map -0:a -map 0:a:${audioIdx} -metadata:s:a:0 "title=${MMCodec} - ${MMChannelLayout} - MM" -disposition:a:0 default`
          
                }
    
              }
    
            }
    
          }
    
        }
    
        if (ac3Count > 1) {
  
          console.log(`There is more than 1 AC3 5.1 track. This is probably due to it being a foreign-language film with an additional English dub.`)
          console.log(`Checking for signs that the first audio track has been processed`)
          console.log(`Assuming stream 2 is the first audio track`)
          response.infoLog += `There is more than 1 AC3 5.1 track. This is probably due to it being a foreign-language film with an additional English dub.\n Checking for signs that the first audio track has been processed.\n Assuming stream 2 is the first audio track.\n`

          if (
              file.ffProbeData.streams[1].codec_type.toLowerCase() === 'audio' &&
              file.ffProbeData.streams[1].codec_name.toLowerCase() === 'ac3' &&
              file.ffProbeData.streams[1].tags.title != undefined &&
              file.ffProbeData.streams[1].tags.title.includes("MM")
          ) {

            console.log(`First track is labelled by this plugin, and set as default - safe to assume this file has been processed. Taking no action.`)
            response.infoLog += `☑ First track is labelled by this plugin, and set as default - safe to assume this file has been processed. Taking no action.\n`

          }
    
          else {
    
            console.log(`First audio stream is AC3 5.1, but not labelled as expected. Resolving.`)
            response.infoLog += `First audio stream is AC3 5.1, but not labelled as expected. Resolving.\n`

            let MMCodec = file.ffProbeData.streams[1].codec_name.toUpperCase();
            let MMChannelLayout = file.ffProbeData.streams[1].channel_layout.replace('(side)', '');

            ffmpegAudioFirstTrack = ` -map -0:a -map 0:a:0 -metadata:s:a:0 "title=${MMCodec} - ${MMChannelLayout} - MM" -disposition:a:0 default`

            console.log(`Copying over other AC3 5.1 tracks`)

            audioIdx = 0 //Set to 0 since already accounted for track 1

            for (let i = 2; i < file.ffProbeData.streams.length; i ++) {
    
              // Work with audio streams only
              if (file.ffProbeData.streams[i].codec_type.toLowerCase() === 'audio') {
      
                //console.log(`Stream ${i} is an audio stream`);
      
                // Keep track of audio stream relative numbers
                try {
                  if (file.ffProbeData.streams[i].codec_type.toLowerCase() == "audio") {
                    audioIdx++;
                    //console.log(`audioIdx = ${audioIdx}`)
                  }
                } catch (err) {}

                ffmpegAudioOtherTracks += ` -map 0:a:${audioIdxTruehd}`
    
              };

            };

          };
    
        };
    
      };
    
    };

  };

  const processSubs = (file, librarySettings, inputs, otherArguments) => {

    if (inputs.process_subs == false) {

      response.infoLog += `Processing subs set to skip. Copying all present tracks over.\n`

    }

    else {

      // Function variables
      let subIdx = -1;

      console.log(` === Running processSubs function === `)

      // Go through all subtitles, removing non-English/German subs and commentary subs
      for (let i = 0; i < file.ffProbeData.streams.length; i ++) {

        // Work with subtitle streams only
        if (file.ffProbeData.streams[i].codec_type.toLowerCase() === 'subtitle') {
           
          // Keep track of subtitle stream relative numbers
          try {
            if (file.ffProbeData.streams[i].codec_type.toLowerCase() == "subtitle") {
              subIdx++;
            }
          } catch (err) {}

          // Remove any subtitles with no language set
          if (file.ffProbeData.streams[i].tags.language == undefined) {

            console.log(`Stream ${i} (subtitle stream ${subIdx}) has no language. Removing.`)
            response.infoLog += `Stream ${i} (subtitle stream ${subIdx}) has no language. Removing. \n`

            ffmpegSubs += ` -map -0:s:${subIdx}`

          }
          
          // Remove any subtitles not in English or German
          else if (
            file.ffProbeData.streams[i].tags.language.toLowerCase() !== "eng" &&
            file.ffProbeData.streams[i].tags.language.toLowerCase() !== "ger"
          ) {

            console.log(`Stream ${i} (subtitle stream ${subIdx}) is not in a desired language. Removing.`)
            response.infoLog += `Stream ${i} (subtitle stream ${subIdx}) is not in a desired language. Removing. \n`

            ffmpegSubs += ` -map -0:s:${subIdx}`

          }

          // Remove any subtitles that are for commentary
          else if (
            (file.ffProbeData.streams[i].tags.title != undefined && 
            file.ffProbeData.streams[i].tags.title.toLowerCase().includes("commentary") || 
            file.ffProbeData.streams[i].disposition.comment == 1) &&
            inputs.remove_commentary == true
            
          ) { 

            console.log(`Stream ${i} (subtitle stream ${subIdx}) is for a commentary track. Selected to remove.`)
            response.infoLog += `Stream ${i} (subtitle stream ${subIdx}) is for a commentary track. Selected to remove. \n`

            ffmpegSubs += ` -map -0:s:${subIdx}`

          }

          else if (
            (file.ffProbeData.streams[i].tags.title != undefined && 
            file.ffProbeData.streams[i].tags.title.toLowerCase().includes("commentary") || 
            file.ffProbeData.streams[i].disposition.comment == 1) &&
            inputs.remove_commentary == false
            
          ) { 

            console.log(`Stream ${i} (subtitle stream ${subIdx}) is for a commentary track. Selected to keep.`)
            response.infoLog += `Stream ${i} (subtitle stream ${subIdx}) is for a commentary track. Selected to keep. \n`

          }

          else {

            console.log(`Stream ${i} (subtitle stream ${subIdx}) is wanted. Keeping.`)
            response.infoLog += `Stream ${i} (subtitle stream ${subIdx}) is wanted. Keeping. \n`

          }

        };

      };

    };

  };

  const processVideo = (file, librarySettings, inputs, otherArguments) => {

      if (inputs.process_video == false) {

        response.infoLog += `Processing video set to skip. Copying all present tracks over.\n`

      }

      else {

      console.log(` === Running processVideo function === `)

      // Check if video track is already HEVC
      if (file.ffProbeData.streams[0].codec_name.toLowerCase() === 'hevc') {

        console.log(`File is already HEVC. No action needed.`)
        response.infoLog += `☑ File is already HEVC. No action needed.\n`

      }

      else {

        console.log('File needs transcoding to HEVC. Converting now.')
        response.infoLog += `☒ File needs transcoding to HEVC.\n`

        ffmpegVideo = ` -c:v libx265 -pix_fmt yuv420p10le -preset slow -x265-params crf=${inputs.crf}:bframes=8:rc-lookahead=32:b-intra=1:aq-mode=3`

      }

    };

  };

  // Start running functions

  processAudio(file, librarySettings, inputs, otherArguments);

  processSubs(file, librarySettings, inputs, otherArguments);

  processVideo(file, librarySettings, inputs, otherArguments);

  if (ffmpegAudioFirstTrack.length > 0 || ffmpegAudioOtherTracks.length > 0 || ffmpegSubs.length > 0 || ffmpegVideo.length > 0) {

    response.infoLog += '☒ Changes are required! \n';

    response.FFmpegMode = true;

    response.container = `.${file.container}`;

    response.preset = `,-c copy -map 0:v?${ffmpegVideo} -map 0:a?${ffmpegAudioFirstTrack}${ffmpegAudioOtherTracks} -map 0:s?${ffmpegSubs} -map 0:d? -max_muxing_queue_size 9999`;
  
    console.log(response.preset)

    response.processFile = true;

    return response;

  }

  if (ffmpegAudioFirstTrack.length == 0 && ffmpegAudioOtherTracks.length == 0 && ffmpegSubs.length == 0 && ffmpegVideo.length == 0) {

    response.infoLog += '☑ No changes are required \n';

    response.processFile = false;

    return response;

  }

};

module.exports.details = details;
module.exports.plugin = plugin;