Metadata embed and m4b merge fixes and cleanup

client/pages/audiobook/_id/manage.vue

@@ -91,6 +91,10 @@
             A backup of your original audio files will be stored in <span class="rounded-md bg-neutral-600 text-sm text-white py-0.5 px-1 font-mono">/metadata/cache/items/{{ libraryItemId }}/</span>. Make sure to periodically purge items cache.
           </p>
         </div>
+        <div v-if="selectedTool === 'embed' && audioFiles.length > 1" class="flex items-start mb-2">
+          <span class="material-icons text-base text-warning pt-1">star</span>
+          <p class="text-gray-200 ml-2">Chapters are not embedded in multi-track audiobooks.</p>
+        </div>
         <div v-if="selectedTool === 'm4b'" class="flex items-start mb-2">
           <span class="material-icons text-base text-warning pt-1">star</span>
           <p class="text-gray-200 ml-2">Encoding can take up to 30 minutes.</p>

server/controllers/LibraryItemController.js

@@ -398,7 +398,8 @@ class LibraryItemController {
     }
 
     const useTone = req.query.tone === '1'
-    this.audioMetadataManager.updateMetadataForItem(req.user, req.libraryItem, useTone)
+    const forceEmbedChapters = req.query.forceEmbedChapters === '1'
+    this.audioMetadataManager.updateMetadataForItem(req.user, req.libraryItem, useTone, forceEmbedChapters)
     res.sendStatus(200)
   }
 

server/managers/AbMergeManager.js

@@ -62,7 +62,7 @@ class AbMergeManager {
       targetFilename,
       targetFilepath: Path.join(libraryItem.path, targetFilename),
       itemCachePath,
-      toneMetadataObject: null
+      toneJsonObject: null
     }
     const taskDescription = `Encoding audiobook "${libraryItem.media.metadata.title}" into a single m4b file.`
     task.setData('encode-m4b', 'Encoding M4b', taskDescription, taskData)
@@ -122,23 +122,18 @@ class AbMergeManager {
 
     var toneJsonPath = null
     try {
-      toneJsonPath = Path.join(itemCacheDir, 'metadata.json')
-      await toneHelpers.writeToneMetadataJsonFile(libraryItem, libraryItem.media.chapters, toneJsonPath)
+      toneJsonPath = Path.join(task.data.itemCachePath, 'metadata.json')
+      await toneHelpers.writeToneMetadataJsonFile(libraryItem, libraryItem.media.chapters, toneJsonPath, 1)
     } catch (error) {
-      Logger.error(`[AudioMetadataManager] Write metadata.json failed`, error)
+      Logger.error(`[AbMergeManager] Write metadata.json failed`, error)
       toneJsonPath = null
     }
 
-    const toneMetadataObject = toneHelpers.getToneMetadataObject(libraryItem, chaptersFilePath)
-    toneMetadataObject.TrackNumber = 1
-    task.data.toneMetadataObject = toneMetadataObject
     task.data.toneJsonObject = {
       'ToneJsonFile': toneJsonPath,
       'TrackNumber': 1,
     }
 
-    Logger.debug(`[AbMergeManager] Book "${libraryItem.media.metadata.title}" tone metadata object=`, toneMetadataObject)
-
     var workerData = {
       inputs: ffmpegInputs,
       options: ffmpegOptions,

server/managers/AudioMetadataManager.js

@@ -15,9 +15,9 @@ class AudioMetadataMangaer {
     this.clientEmitter = clientEmitter
   }
 
-  updateMetadataForItem(user, libraryItem, useTone = true) {
+  updateMetadataForItem(user, libraryItem, useTone, forceEmbedChapters) {
     if (useTone) {
-      this.updateMetadataForItemWithTone(user, libraryItem)
+      this.updateMetadataForItemWithTone(user, libraryItem, forceEmbedChapters)
     } else {
       this.updateMetadataForItemWithFfmpeg(user, libraryItem)
     }
@@ -30,7 +30,7 @@ class AudioMetadataMangaer {
     return toneHelpers.getToneMetadataObject(libraryItem)
   }
 
-  async updateMetadataForItemWithTone(user, libraryItem) {
+  async updateMetadataForItemWithTone(user, libraryItem, forceEmbedChapters) {
     var audioFiles = libraryItem.media.includedAudioFiles
 
     const itemAudioMetadataPayload = {
@@ -49,7 +49,8 @@ class AudioMetadataMangaer {
 
     try {
       toneJsonPath = Path.join(itemCacheDir, 'metadata.json')
-      await toneHelpers.writeToneMetadataJsonFile(libraryItem, audioFiles.length == 1 && libraryItem.media.chapters, toneJsonPath)
+      const chapters = (audioFiles.length == 1 || forceEmbedChapters) ? libraryItem.media.chapters : null
+      await toneHelpers.writeToneMetadataJsonFile(libraryItem, chapters, toneJsonPath, audioFiles.length)
     } catch (error) {
       Logger.error(`[AudioMetadataManager] Write metadata.json failed`, error)
       toneJsonPath = null

server/utils/toneHelpers.js

@@ -72,14 +72,14 @@ module.exports.getToneMetadataObject = (libraryItem, chaptersFile) => {
   return metadataObject
 }
 
-module.exports.writeToneMetadataJsonFile = (libraryItem, chapters, filePath) => {
+module.exports.writeToneMetadataJsonFile = (libraryItem, chapters, filePath, trackTotal) => {
   const bookMetadata = libraryItem.media.metadata
   const coverPath = libraryItem.media.coverPath
 
   const metadataObject = {
     'album': bookMetadata.title || '',
     'title': bookMetadata.title || '',
-    'trackTotal': libraryItem.media.tracks.length,
+    'trackTotal': trackTotal,
     'additionalFields': {}
   }
   if (bookMetadata.subtitle) {
@@ -133,7 +133,7 @@ module.exports.writeToneMetadataJsonFile = (libraryItem, chapters, filePath) =>
     metadataObject['chapters'] = metadataChapters
   }
 
-  return fs.writeFile(filePath, JSON.stringify({ meta: metadataObject }))
+  return fs.writeFile(filePath, JSON.stringify({ meta: metadataObject }, null, 2))
 }
 
 module.exports.tagAudioFile = (filePath, payload) => {