Tdarr_Plugins/Community/Tdarr_Plugin_MC93_Migz5ConvertAudio.js

function details() {
    return {
        id: "Tdarr_Plugin_MC93_Migz5ConvertAudio",
        Stage: "Pre-processing",
        Name: "Migz-Convert audio streams",
        Type: "Audio",
        Operation: "Transcode",
        Description: `This plugin can convert any 2.0 audio track/s to AAC and can create downmixed audio tracks. \n\n`,
        Version: "2.1",
        Link: "",
        Tags: 'pre-processing,ffmpeg,audio only,configurable',
        Inputs: [{
                name: 'aac_stereo',
                tooltip: `Specify if any 2.0 audio tracks should be converted to aac for maximum compatability with devices. Optional.
	            \\nExample:\\n
	            true

	            \\nExample:\\n
	            false`
            },
            {
                name: 'downmix',
                tooltip: `Specify if downmixing should be used to create extra audio tracks. I.e if you have an 8ch but no 2ch or 6ch, create the missing audio tracks from the 8 ch. Likewise if you only have 6ch, create the missing 2ch from it. Optional.
	            \\nExample:\\n
	            true

	            \\nExample:\\n
	            false`
            },
        ]
    }
}

function plugin(file, librarySettings, inputs) {
    var response = {
        processFile: false,
        container: '.' + file.container,
        handBrakeMode: false,
        FFmpegMode: true,
        reQueueAfter: true,
        infoLog: '',
    }

    //  Check if both inputs.aac_stereo AND inputs.downmix have been left empty. If they have then exit plugin.
    if (inputs && inputs.aac_stereo == "" && inputs.downmix == "") {
        response.infoLog += "☒Neither aac_stereo or downmix options have been configured within plugin settings, please configure required options. Skipping this plugin. \n"
        response.processFile = false
        return response
    }

    // Check if file is a video. If it isn't then exit plugin.
    if (file.fileMedium !== "video") {
        console.log("File is not video")
        response.infoLog += "☒File is not video. \n"
        response.processFile = false;
        return response
    }

    // Set up required variables.
    var ffmpegCommandInsert = ''
    var audioIdx = 0
    var has2Channel = false
    var has6Channel = false
    var has8Channel = false
    var convert = false

    // Go through each stream in the file.
    for (var i = 0; i < file.ffProbeData.streams.length; i++) {
        try {
            // Go through all audio streams and check if 2,6 & 8 channel tracks exist or not.
            if (file.ffProbeData.streams[i].codec_type.toLowerCase() == "audio") {
                if (file.ffProbeData.streams[i].channels == "2") {
                    has2Channel = true
                }
                if (file.ffProbeData.streams[i].channels == "6") {
                    has6Channel = true
                }
                if (file.ffProbeData.streams[i].channels == "8") {
                    has8Channel = true
                }
            }
        } catch (err) {}
    }

    // Go through each stream in the file.
    for (var i = 0; i < file.ffProbeData.streams.length; i++) {
        // Check if stream is audio.
        if (file.ffProbeData.streams[i].codec_type.toLowerCase() == "audio") {
            // Catch error here incase user left inputs.downmix empty.
            try {
				// Check if inputs.downmix is set to true.
                if (inputs.downmix.toLowerCase() == "true") {
					// Check if file has 8 channel audio but no 6 channel, if so then create extra downmix from the 8 channel.
                    if (has8Channel == true && has6Channel == false && file.ffProbeData.streams[i].channels == "8") {
                        ffmpegCommandInsert += `-map 0:${i} -c:a:${audioIdx} ac3 -ac 6 -metadata:s:a:${audioIdx} title="5.1 " `
                        response.infoLog += "☒Audio track is 8 channel, no 6 channel exists. Creating 6 channel from 8 channel. \n"
                        convert = true
                    }
					// Check if file has 6 channel audio but no 2 channel, if so then create extra downmix from the 6 channel.
                    if (has6Channel == true && has2Channel == false && file.ffProbeData.streams[i].channels == "6") {
                        ffmpegCommandInsert += `-map 0:${i} -c:a:${audioIdx} aac -ac 2 -metadata:s:a:${audioIdx} title="2.0 " `
                        response.infoLog += "☒Audio track is 6 channel, no 2 channel exists. Creating 2 channel from 6 channel. \n"
                        convert = true
                    }
                }
            } catch (err) {}

            // Catch error here incase user left inputs.downmix empty.
            try {
				// Check if inputs.aac_stereo is set to true.
                if (inputs.aac_stereo.toLowerCase() == "true") {
					// Check if codec_name for stream is NOT aac AND check if channel ammount is 2.
                    if (file.ffProbeData.streams[i].codec_name != "aac" && file.ffProbeData.streams[i].channels == "2") {
                        ffmpegCommandInsert += `-c:a:${audioIdx} aac `
                        response.infoLog += "☒Audio track is 2 channel but is not AAC. Converting. \n"
                        convert = true
                    }
                }
            } catch (err) {}
            audioIdx++
        }

    }

    // Convert file if convert variable is set to true.
    if (convert == true) {
        response.processFile = true;
        response.preset = `, -map 0 -c:v copy -c:a copy ${ffmpegCommandInsert} -strict -2 -c:s copy -max_muxing_queue_size 4096 `
    } else {
        response.infoLog += "☑File contains all required audio formats. \n"
        response.processFile = false;
    }
    return response

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