diff --git a/server/VideoStack.cpp b/server/VideoStack.cpp
index ff4804f1..d5168147 100644
--- a/server/VideoStack.cpp
+++ b/server/VideoStack.cpp
@@ -62,15 +62,16 @@ void Channel::addParam(const std::weak_ptr<Param>& p)
 void Channel::onFrame(const mediakit::FFmpegFrame::Ptr& frame)
 {
     std::weak_ptr<Channel> weakSelf = shared_from_this();
-    // toolkit::WorkThreadPool::Instance().getFirstPoller()->async([weakSelf, frame]() {
-    auto self = weakSelf.lock();
-    if (!self) {
-        return;
-    }
-    self->_tmp = self->_sws->inputFrame(frame);
+    _poller = _poller ? _poller : toolkit::WorkThreadPool::Instance().getPoller();
+    _poller->async([weakSelf, frame]() {
+        auto self = weakSelf.lock();
+        if (!self) {
+            return;
+        }
+        self->_tmp = self->_sws->inputFrame(frame);
 
-    self->forEachParam([self](const Param::Ptr& p) { self->fillBuffer(p); });
-    // });
+        self->forEachParam([self](const Param::Ptr& p) { self->fillBuffer(p); });
+    });
 }
 
 void Channel::forEachParam(const std::function<void(const Param::Ptr&)>& func)
@@ -440,6 +441,7 @@ int VideoStackManager::stopVideoStack(const std::string& id)
     auto it = _stackMap.find(id);
     if (it != _stackMap.end()) {
         _stackMap.erase(it);
+        InfoL << "VideoStack stop: " << id;
         return 0;
     }
     return -1;
diff --git a/server/VideoStack.h b/server/VideoStack.h
index d4378ab3..99455b40 100644
--- a/server/VideoStack.h
+++ b/server/VideoStack.h
@@ -80,6 +80,7 @@ class Channel : public std::enable_shared_from_this<Channel> {
     std::vector<std::weak_ptr<Param>> _params;
 
     mediakit::FFmpegSws::Ptr _sws;
+    toolkit::EventPoller::Ptr _poller;
 };
 
 class StackPlayer : public std::enable_shared_from_this<StackPlayer> {
diff --git a/server/WebApi.cpp b/server/WebApi.cpp
index 9ea3681d..9b1c8ba9 100755
--- a/server/WebApi.cpp
+++ b/server/WebApi.cpp
@@ -1937,28 +1937,23 @@ void installWebApi() {
     NoticeCenter::Instance().addListener(nullptr, Broadcast::kBroadcastStreamNoneReader, [](BroadcastStreamNoneReaderArgs) {
         auto id = sender.getMediaTuple().stream;
         VideoStackManager::Instance().stopVideoStack(id);
-        InfoL << "VideoStack: " << id <<" stop";
     });
 
     api_regist("/index/api/stack/start", [](API_ARGS_JSON_ASYNC) {
         CHECK_SECRET();
         auto ret = VideoStackManager::Instance().startVideoStack(allArgs.getArgs());
-        if (!ret) {
-            invoker(200, headerOut, "success");
-        } else {
-            invoker(200, headerOut, "failed");
-        }
+        val["code"] = ret;
+        val["msg"] = ret ? "failed" : "success";
+        invoker(200, headerOut, val.toStyledString());
     });
 
     api_regist("/index/api/stack/stop", [](API_ARGS_MAP_ASYNC) {
         CHECK_SECRET();
         CHECK_ARGS("id");
         auto ret = VideoStackManager::Instance().stopVideoStack(allArgs["id"]);
-        if (!ret) {
-            invoker(200, headerOut, "success");
-        } else {
-            invoker(200, headerOut, "failed");
-        }
+        val["code"] = ret;
+        val["msg"] = ret ? "failed" : "success";
+        invoker(200, headerOut, val.toStyledString());
     });
 #endif
 }