1.修复一些bug

@@ -222,11 +222,11 @@ class AdminMakeImmerse implements ShouldQueue
                         $default = $this->adminMakeVideo->poem2->title . "\n" . $this->adminMakeVideo->poem2->author;
                         $contents[] = $this->autoCenter($default,$font_size, $this->output_width);
                         foreach ($this->adminMakeVideo->poem2->verses as $item) {
-                            if ($item->content != '')  $contents[] = $this->autoEnter($item->content, $font_size, $this->output_width);
+                            $source = " " . "\n" . $item->source;
+                            if ($item->content != '') $contents[] = $this->autoEnter($item->content, $font_size, $this->output_width) . "\n" . $this->autoCenter($source, $font_size, $this->output_width);
                             if ($item->annotate != '') $contents[] = $this->autoEnter($item->annotate, $font_size, $this->output_width);
                             if ($item->spelling != '') $contents[] = $this->autoEnter($item->spelling, $font_size, $this->output_width);
                             if ($item->en != '') $contents[] = $this->autoEnter($item->en, $font_size, $this->output_width);
-                            if ($item->source != '') $contents[] = $this->autoEnter($item->source, $font_size, $this->output_width);
                         }
                         break;
                     case 'weather':
@@ -330,7 +330,7 @@ class AdminMakeImmerse implements ShouldQueue
         $video_width = $video_width - 2 * $font_width; // 两侧留出空隙
         $row_count = floor($video_width / $font_width);
         $arr = explode("\n", $string);
-        $title = $arr[0];
+        $title = $arr[0] ?? " ";
         $author = $arr[1];
 
         $title_len = mb_strlen($title);