diff --git a/common/libs/VkCodecUtils/VulkanFrame.cpp b/common/libs/VkCodecUtils/VulkanFrame.cpp
index 3e1dab7..8ddf405 100644
--- a/common/libs/VkCodecUtils/VulkanFrame.cpp
+++ b/common/libs/VkCodecUtils/VulkanFrame.cpp
@@ -282,7 +282,7 @@ static int InitPreset(VkSharedBaseObj<EncoderConfig>& encoderConfig)
     {
         encoderConfig->rateControlMode = VkVideoEncodeRateControlModeFlagBitsKHR::VK_VIDEO_ENCODE_RATE_CONTROL_MODE_CBR_BIT_KHR;
         encoderConfig->gopStructure.SetConsecutiveBFrameCount(0);
-        encoderConfig->gopStructure.SetGopFrameCount(-1);
+        encoderConfig->gopStructure.SetGopFrameCount((uint16_t)-1);
         encoderConfig->gopStructure.SetIdrPeriod(0);
         encoderConfig->gopStructure.SetLastFrameType(VkVideoGopStructure::FrameType::FRAME_TYPE_P); // ? set right value
         encoderConfig->encodeUsageHints = VK_VIDEO_ENCODE_USAGE_STREAMING_BIT_KHR;
diff --git a/vk_video_encoder/libs/VkVideoEncoder/VkEncoderConfig.cpp b/vk_video_encoder/libs/VkVideoEncoder/VkEncoderConfig.cpp
index 152bde2..c43bc7b 100644
--- a/vk_video_encoder/libs/VkVideoEncoder/VkEncoderConfig.cpp
+++ b/vk_video_encoder/libs/VkVideoEncoder/VkEncoderConfig.cpp
@@ -346,13 +346,15 @@ int EncoderConfig::ParseArguments(int argc, char *argv[])
             averageBitrate = targetBitrate << 20;
             }
         } else if (strcmp(argv[i], "--vbvbuf-ratio") == 0) {
-            int vbvbuf_ratio;
-            int sscanf_result = sscanf(argv[i+1], "%d", &vbvbuf_ratio);
-            if (sscanf_result != 1 || vbvbuf_ratio <= 0 || vbvbuf_ratio > 8) {
-                fprintf(stderr, "invalid parameter for %s\n", argv[i - 1]);
-                return VK_ERROR_VIDEO_PROFILE_CODEC_NOT_SUPPORTED_KHR;
+            if ((++i >= argc) !=1) {
+                int vbvbuf_ratio;
+                int sscanf_result = sscanf(argv[i], "%d", &vbvbuf_ratio);
+                if (sscanf_result != 1 || vbvbuf_ratio <= 0 || vbvbuf_ratio > 8) {
+                    fprintf(stderr, "invalid parameter for %s\n", argv[i - 1]);
+                    return VK_ERROR_VIDEO_PROFILE_CODEC_NOT_SUPPORTED_KHR;
+                }
+                vbvbufratio = vbvbuf_ratio;
             }
-            vbvbufratio = vbvbuf_ratio;
 #endif //_TRANSCODING
         } else if (args[i] == "--idrPeriod") {
             int32_t idrPeriod = EncoderConfig::DEFAULT_GOP_IDR_PERIOD;
@@ -678,7 +680,7 @@ VkResult EncoderConfig::CreateCodecConfig(int argc, char *argv[],
 
         VkResult result = vkEncoderConfigh264->InitializeParameters();
         if (result != VK_SUCCESS) {
-#if (!_TRANSCODING)            
+#if (!_TRANSCODING)
             assert(!"InitializeParameters failed");
             return result;
 #endif // !_TRANSCODING
@@ -698,7 +700,7 @@ VkResult EncoderConfig::CreateCodecConfig(int argc, char *argv[],
 
         VkResult result = vkEncoderConfigh265->InitializeParameters();
         if (result != VK_SUCCESS) {
-#if (!_TRANSCODING)            
+#if (!_TRANSCODING)
             assert(!"InitializeParameters failed");
             return result;
 #endif // !_TRANSCODING
@@ -718,8 +720,10 @@ VkResult EncoderConfig::CreateCodecConfig(int argc, char *argv[],
 
         VkResult result = vkEncoderConfigAV1->InitializeParameters();
         if (result != VK_SUCCESS) {
+#if (!_TRANSCODING)
             assert(!"InitializeParameters failed");
             return result;
+#endif //!_TRANSCODING
         }
 
         encoderConfig = vkEncoderConfigAV1;
diff --git a/vk_video_encoder/libs/VkVideoEncoder/VkEncoderConfigH264.cpp b/vk_video_encoder/libs/VkVideoEncoder/VkEncoderConfigH264.cpp
index 99bcc02..045a4b7 100644
--- a/vk_video_encoder/libs/VkVideoEncoder/VkEncoderConfigH264.cpp
+++ b/vk_video_encoder/libs/VkVideoEncoder/VkEncoderConfigH264.cpp
@@ -469,7 +469,7 @@ bool EncoderConfigH264::InitRateControl()
 #if (_TRANSCODING)
     if (encodingProfile == EncoderConfig::LOW_LATENCY_STREAMING)
     {
-        vbvBufferSize = averageBitrate / frameRate * vbvbufratio; // averageBitrate is a uint32_t, no overflow
+        vbvBufferSize = (uint32_t)(averageBitrate / frameRate * vbvbufratio); // averageBitrate is a uint32_t, no overflow
     }
     else if (encodingProfile == EncoderConfig::ARCHIVING)
     {
diff --git a/vk_video_encoder/libs/VkVideoEncoder/VkVideoEncoder.h b/vk_video_encoder/libs/VkVideoEncoder/VkVideoEncoder.h
index 8a69784..d7b9753 100644
--- a/vk_video_encoder/libs/VkVideoEncoder/VkVideoEncoder.h
+++ b/vk_video_encoder/libs/VkVideoEncoder/VkVideoEncoder.h
@@ -502,7 +502,7 @@ class VkVideoEncoder : public VkVideoRefCountBase {
         , m_qpMapImagePool()
 #if (_TRANSCODING)
         , m_encodeTimeMicroSec(0)
-#endif // _TRANSCODING
+#endif  //_TRANSCODING
     { }
 
     // Factory Function
diff --git a/vk_video_encoder/libs/VkVideoEncoder/VkVideoEncoderH265.cpp b/vk_video_encoder/libs/VkVideoEncoder/VkVideoEncoderH265.cpp
index de23d27..ef1f87b 100644
--- a/vk_video_encoder/libs/VkVideoEncoder/VkVideoEncoderH265.cpp
+++ b/vk_video_encoder/libs/VkVideoEncoder/VkVideoEncoderH265.cpp
@@ -76,7 +76,7 @@ VkResult VkVideoEncoderH265::InitEncoderCodec(VkSharedBaseObj<EncoderConfig>& en
 
         if (encoderConfig->encodingProfile == EncoderConfig::LOW_LATENCY_STREAMING)
         {
-            m_encoderConfig->vbvBufferSize = encoderConfig->averageBitrate / frameRate * encoderConfig->vbvbufratio; // averageBitrate is a uint32_t, no overflow
+            m_encoderConfig->vbvBufferSize = (uint32_t)(encoderConfig->averageBitrate / frameRate * encoderConfig->vbvbufratio); // averageBitrate is a uint32_t, no overflow
             printf("vbv size %u\n", m_encoderConfig->vbvBufferSize);
         }
         else if (encoderConfig->encodingProfile == EncoderConfig::ARCHIVING)