1.优化ffmpeg命令，适配各种类型视频

@@ -42,7 +42,16 @@ class ImmerseController extends AdminController
             });
             $grid->column('type','类型')->using([1 => '音频', 2 => '视频']);
             $grid->column('duration','时长');
-            $grid->column('size','大小');
+            $grid->column('size','大小')->display(function ($value){
+                $size = $value > (1024)
+                    ? ($value > (1024 * 1024)
+                        ? ($value > (1024 * 1024 * 1024)
+                            ? round($value / (1024 * 1024 * 1024),2 ) . "GB"
+                            : round($value / (1024 * 1024),2) . "MB")
+                        : round($value / 1024,2) . "KB")
+                    : $value . 'Bytes';
+                return $size;
+            });
             $grid->column('poem_id');
             $grid->column('temp_id');
             $grid->column('thumbnail')->image();