Edit book: A new tool to create audio narration of all text in the book using Text-to-speech

src/calibre/ebooks/oeb/polish/tts.py

@@ -534,6 +534,7 @@ def embed_tts(container, report_progress=None, callback_to_download_voices=None)
         html_item.set('media-overlay', smilitem.get('id'))
         duration_map[smilitem.get('id')] = file_duration
     container.set_media_overlay_durations(duration_map)
+    return True
 
 
 def develop():

src/calibre/gui2/tweak_book/tts.py

@@ -196,6 +196,8 @@ def develop():
         outpath = b + '-tts' + e
         container.commit(outpath)
         print('Output saved to:', outpath)
+    else:
+        print('Failed')
     del d
     del app
 

src/calibre/gui2/tweak_book/ui.py

@@ -468,6 +468,8 @@ class Main(MainWindow):
         self.action_get_ext_resources = treg('download-metadata.png', _('Download external &resources'),
                                              self.boss.get_external_resources, 'get-external-resources', (), _(
             'Download external resources in the book (images/stylesheets/etc/ that are not included in the book)'))
+        self.action_embed_tts = treg('bullhorn.png', _('Add Text-to-speech narration'), self.boss.embed_tts, 'embed-tts', (), _(
+            'Add audio narration for all the book text using Text-to-speech generation'))
 
         def ereg(icon, text, target, sid, keys, description):
             return reg(icon, text, partial(self.boss.editor_action, target), sid, keys, description)
@@ -639,6 +641,7 @@ class Main(MainWindow):
         e.addAction(self.action_transform_styles)
         e.addAction(self.action_transform_html)
         e.addAction(self.action_fix_html_all)
+        e.addAction(self.action_embed_tts)
         e.addAction(self.action_pretty_all)
         e.addAction(self.action_rationalize_folders)
         e.addAction(self.action_add_cover)