add Set First Audio Stream Default plugin

Community/Tdarr_Plugin_gabehf_Set_First_Audio_Stream_Default.js

@@ -0,0 +1,84 @@
+// tdarrSkipTest
+/* eslint max-len: 0, no-plusplus: ["error", { "allowForLoopAfterthoughts": true }] */
+const details = () => ({
+  id: 'Tdarr_Plugin_gabehf_Set_First_Audio_Stream_Default',
+  Stage: 'Pre-processing',
+  Name: 'Set First Audio Stream As Default',
+  Type: 'Audio',
+  Operation: 'Transcode',
+  Description:
+      'This plugin sets the first audio stream as the default. \n\n',
+  Version: '1.0',
+  Tags: 'audio only,ffmpeg',
+  Inputs: [],
+});
+
+// eslint-disable-next-line @typescript-eslint/no-unused-vars
+const plugin = (file, librarySettings, inputs, otherArguments) => {
+  const lib = require('../methods/lib')();
+  // eslint-disable-next-line @typescript-eslint/no-unused-vars,no-param-reassign
+  inputs = lib.loadDefaultValues(inputs, details);
+  const response = {
+    processFile: false,
+    preset: '',
+    container: `.${file.container}`,
+    handBrakeMode: false,
+    FFmpegMode: true,
+    reQueueAfter: false,
+    infoLog: '',
+  };
+
+  // Check if file is a video. If it isn't then exit plugin.
+  if (file.fileMedium !== 'video') {
+    // eslint-disable-next-line no-console
+    console.log('File is not video');
+    response.infoLog += '☒File is not video \n';
+    response.processFile = false;
+    return response;
+  }
+
+  // Set up required variables.
+  let ffmpegCommandInsert = '';
+  let audioIdx = 0;
+  let convert = false;
+  let defaultHasBeenSet = false;
+
+  // Go through each stream in the file.
+  for (let i = 0; i < file.ffProbeData.streams.length; i++) {
+    // Catch error here incase the metadata is completely missing.
+    try {
+      // Check if stream is audio
+      if (file.ffProbeData.streams[i].codec_type.toLowerCase() === 'audio') {
+        // Check if the audio stream is the first AND it is not default
+        if (audioIdx === 0 && file.ffProbeData.streams[i].disposition.default !== 1) {
+          ffmpegCommandInsert += `-disposition:a:${audioIdx} default `;
+          response.infoLog += `First audio stream 0:a:${audioIdx} is not default; setting as default. \n`;
+          defaultHasBeenSet = true;
+          convert = true;
+          // else if it is not the first stream AND we have changed the default track AND this is the default track
+        } else if (defaultHasBeenSet && audioIdx !== 0 && file.ffProbeData.streams[i].disposition.default === 1) {
+          ffmpegCommandInsert += `-disposition:a:${audioIdx} 0 `;
+          response.infoLog += `Removing audio stream 0:a:${audioIdx} as default. \n`;
+          convert = true; // should already be set by now but whatever
+        }
+        audioIdx += 1;
+      }
+    } catch (err) {
+      // Error
+    }
+  }
+
+  // Convert file if convert variable is set to true.
+  if (convert === true) {
+    response.processFile = true;
+    response.preset = `, -map 0 ${ffmpegCommandInsert} -c copy -max_muxing_queue_size 9999`;
+    response.container = `.${file.container}`;
+    response.reQueueAfter = true;
+  } else {
+    response.processFile = false;
+    response.infoLog += "☑File doesn't contain audio tracks that require modification.\n";
+  }
+  return response;
+};
+module.exports.details = details;
+module.exports.plugin = plugin;