diff --git a/framework/codec/ActiveDecoder.cpp b/framework/codec/ActiveDecoder.cpp
index cb67c1171..0f3da2074 100644
--- a/framework/codec/ActiveDecoder.cpp
+++ b/framework/codec/ActiveDecoder.cpp
@@ -224,7 +224,8 @@ int ActiveDecoder::thread_send_packet(unique_ptr<IAFPacket> &packet)
         return 0;
     }
 
-    if (mInputQueue.size() >= MAX_INPUT_SIZE) {
+    if ((mInputQueue.size() >= MAX_INPUT_SIZE)
+            || (mOutputQueue.size() >= maxOutQueueSize)) {
         // TODO: wait for timeOut us
         status |= STATUS_RETRY_IN;
     } else {
diff --git a/framework/codec/ActiveDecoder.h b/framework/codec/ActiveDecoder.h
index b8e1c19f3..b90097a3b 100644
--- a/framework/codec/ActiveDecoder.h
+++ b/framework/codec/ActiveDecoder.h
@@ -82,7 +82,7 @@ class ActiveDecoder : public Cicada::IDecoder {
     std::condition_variable mSleepCondition{};
     std::queue<std::unique_ptr<IAFPacket>> mInputQueue{};
     std::queue<std::unique_ptr<IAFFrame>> mOutputQueue{};
-    int maxOutQueueSize = 16;
+    int maxOutQueueSize = 2;
     std::mutex mMutex{};
     std::mutex mSleepMutex{};
 #endif
diff --git a/framework/codec/Apple/AppleVideoToolBox.cpp b/framework/codec/Apple/AppleVideoToolBox.cpp
index 2dc02022b..4695443ee 100644
--- a/framework/codec/Apple/AppleVideoToolBox.cpp
+++ b/framework/codec/Apple/AppleVideoToolBox.cpp
@@ -4,6 +4,7 @@
 #include "AppleVideoToolBox.h"
 #include "codec/utils_ios.h"
 #include "utils/errors/framework_error.h"
+#include "utils/timer.h"
 #include <cinttypes>
 
 #include "video_tool_box_utils.h"
@@ -47,11 +48,11 @@ namespace Cicada {
         if (codec == AF_CODEC_ID_HEVC) {
 #if TARGET_OS_IPHONE
 
-            if (__builtin_available(iOS 11.0, *)) {
+            if (__builtin_available(iOS 11.0, *))
 #else
-
-            if (__builtin_available(macOS 10.13, *)) {
+            if (__builtin_available(macOS 10.13, *))
 #endif
+            {
                 return VTIsHardwareDecodeSupported(kCMVideoCodecType_HEVC);
             } else {
                 return false;
@@ -356,18 +357,24 @@ namespace Cicada {
             init_decoder_internal();
         }
 
+        int64_t startDecodeTime = af_getsteady_ms();
+
         while (!mRecoveringQueue.empty()) {
             int ret = enqueue_decoder_internal(mRecoveringQueue.front());
 
             if (ret != -EAGAIN) {
                 mRecoveringQueue.pop();
+            } else {
+                return -EAGAIN;
             }
 
             if (!mRunning) {
                 return -EAGAIN;
             }
 
-            //   return -EAGAIN;
+            if (af_getsteady_ms() - startDecodeTime > 50) {
+                return -EAGAIN;
+            }
         }
 
         if (pPacket == nullptr) {
@@ -459,7 +466,7 @@ namespace Cicada {
 //            //       AF_TRACE;
 //            return -EAGAIN;
 //        }
-        if (pPacket->getInfo().flags) {
+        if (pPacket->getInfo().flags & AF_PKT_FLAG_KEY) {
             mThrowPacket = false;
         }
 
@@ -690,7 +697,7 @@ namespace Cicada {
     {
         pPacket->setDiscard(true);
 
-        if (pPacket->getInfo().flags) {
+        if (pPacket->getInfo().flags & AF_PKT_FLAG_KEY) {
             while (!mRecoveryQueue.empty()) {
                 mRecoveryQueue.pop();
             }
diff --git a/mediaPlayer/SuperMediaPlayer.cpp b/mediaPlayer/SuperMediaPlayer.cpp
index 492d3acc0..7773ed934 100644
--- a/mediaPlayer/SuperMediaPlayer.cpp
+++ b/mediaPlayer/SuperMediaPlayer.cpp
@@ -1597,14 +1597,14 @@ namespace Cicada {
 
                     int ret = DecodeVideoPacket(mVideoPacket);
 
-                    if (ret == -EAGAIN) {
+                    if (ret & STATUS_RETRY_IN) {
                         break;
                     }
 
-                    if (af_getsteady_ms() - startDecodeTime > 100) {
+                    if (af_getsteady_ms() - startDecodeTime > 50) {
                         break;
                     }
-                } while (mSeekNeedCatch);
+                } while (mSeekNeedCatch || dropLateVideoFrames);
             }
         }
 
@@ -1797,7 +1797,7 @@ namespace Cicada {
 
                 // if send all audio data, try to render again to send more data.
                 if (RENDER_FULL == ret) {
-                    audioRendered = RenderAudio();
+                    RenderAudio();
                 }
             }
         }
@@ -2024,7 +2024,7 @@ namespace Cicada {
             }
 
             if (dropLateVideoFrames) {
-                if (videoLateUs > 0) {
+                if (videoLateUs > 10 * 1000) {
                     render = false;
                 } else {
                     dropLateVideoFrames = false;
diff --git a/mediaPlayer/SuperMediaPlayer.h b/mediaPlayer/SuperMediaPlayer.h
index 3257c7b5f..6d533daf2 100644
--- a/mediaPlayer/SuperMediaPlayer.h
+++ b/mediaPlayer/SuperMediaPlayer.h
@@ -60,7 +60,6 @@ namespace Cicada {
     typedef enum APP_STATUS {
         APP_FOREGROUND,
         APP_BACKGROUND,
-        APP_FOREGROUND_CATCHUP,
     } APP_STATUS;