#399

backend/app/controllers/posts_controller.rb

@@ -148,7 +148,8 @@ class PostsController < ApplicationController
                                          original_created_from: params[:original_created_from],
                                          original_created_before: params[:original_created_before],
                                          parent_post_ids: parse_parent_post_ids,
-                                         video_ms: params[:video_ms] }).create!
+                                         video_ms: params[:video_ms],
+                                         duration: params[:duration] }).create!
 
     post.reload
     render json: PostRepr.base(post), status: :created