diff --git a/src/queue/share_queue.cpp b/src/queue/share_queue.cpp
index ab29496..a5e0b16 100644
--- a/src/queue/share_queue.cpp
+++ b/src/queue/share_queue.cpp
@@ -172,6 +172,19 @@ bool share_queue_init_index(share_queue* q)
 	return true;
 }
 
+bool shared_queue_get_video_format(share_queue* q,int* format ,int* width, 
+	int* height, int64_t* avgtime)
+{
+	if (!q || !q->header)
+		return false;
+
+	*format = q->header->format;
+	*width = q->header->frame_width;
+	*height = q->header->frame_height;
+	*avgtime = (q->header->frame_time)/100;
+	return true;
+}
+
 bool shared_queue_get_video(share_queue* q, uint8_t** data, 
 	uint32_t*linesize, uint64_t* timestamp)
 {
@@ -251,7 +264,7 @@ bool shared_queue_push_video(share_queue* q, uint32_t* linesize,
 	uint8_t* buff = (uint8_t*)q->header + offset;
 	frame_header* head = (frame_header*)buff;
 	uint8_t* data = (uint8_t*)buff + q->header->element_header_size;
-	uint32_t planes = 0;
+	int planes = 0;
 
 	switch (q->header->format) {
 	case AV_PIX_FMT_NONE:
diff --git a/src/queue/share_queue.h b/src/queue/share_queue.h
index d3327c1..206e9b5 100644
--- a/src/queue/share_queue.h
+++ b/src/queue/share_queue.h
@@ -65,6 +65,9 @@ bool shared_queue_open(share_queue* q, int mode);
 void shared_queue_close(share_queue* q);
 bool shared_queue_check(int mode);
 bool shared_queue_set_delay(share_queue* q, int delay_video_frame);
+bool share_queue_init_index(share_queue* q);
+bool shared_queue_get_video_format(share_queue* q, int* format, int* width,
+	int* height, int64_t* avgtime);
 bool shared_queue_get_video(share_queue* q, uint8_t** dst_ptr,
 	uint32_t*linesize, uint64_t* timestamp);
 bool shared_queue_push_video(share_queue* q, uint32_t* linesize,
diff --git a/src/virtual-source/dllmain.cpp b/src/virtual-source/dllmain.cpp
index cec5736..dc12182 100644
--- a/src/virtual-source/dllmain.cpp
+++ b/src/virtual-source/dllmain.cpp
@@ -149,8 +149,7 @@ STDAPI RegisterFilters(BOOL bRegister)
 			fm->Release();
 	}
 
-	if (SUCCEEDED(hr) && !bRegister)
-	{
+	if (SUCCEEDED(hr) && !bRegister){
 		hr = AMovieSetupUnregisterServer(CLSID_OBS_VirtualA);
 		hr = AMovieSetupUnregisterServer(CLSID_OBS_VirtualV);
 	}
diff --git a/src/virtual-source/virtual-audio.cpp b/src/virtual-source/virtual-audio.cpp
index 1d5e55b..f6d32ab 100644
--- a/src/virtual-source/virtual-audio.cpp
+++ b/src/virtual-source/virtual-audio.cpp
@@ -182,9 +182,8 @@ HRESULT CVAudioStream::CheckMediaType(const CMediaType *pMediaType)
 {
 	WAVEFORMATEX *paf = (WAVEFORMATEX *)(pMediaType->Format());
 	if (*pMediaType != m_mt)
-	{
 		return E_INVALIDARG;
-	}
+
 	return S_OK;
 }
 
@@ -197,8 +196,7 @@ HRESULT CVAudioStream::DecideBufferSize(IMemAllocator *pAlloc, ALLOCATOR_PROPERT
 	CheckPointer(pProperties, E_POINTER);
 
 	WAVEFORMATEX* pwfex = (WAVEFORMATEX*)m_mt.Format();
-	if (pwfex)
-	{
+	if (pwfex){
 
 		pProperties->cBuffers = 1;
 		pProperties->cbBuffer = AUDIO_BUFFER_SIZE;
diff --git a/src/virtual-source/virtual-cam.cpp b/src/virtual-source/virtual-cam.cpp
index 8349a03..55e3575 100644
--- a/src/virtual-source/virtual-cam.cpp
+++ b/src/virtual-source/virtual-cam.cpp
@@ -77,15 +77,15 @@ HRESULT CVCamStream::FillBuffer(IMediaSample *pms)
 	uint64_t timestamp=0;
 	REFERENCE_TIME start_time=0;
 	REFERENCE_TIME end_time = 0;
+	REFERENCE_TIME duration = 0;
 
 	hr = pms->GetPointer((BYTE**)&dst[0]);
 
 	if (!queue.hwnd){
 		if (shared_queue_open(&queue, ModeVideo)){
-			int format = queue.header->format;
-			int width = queue.header->frame_width;
-			int height = queue.header->frame_height;
-			SetConvertContext(width, height, (AVPixelFormat)format);
+			shared_queue_get_video_format(&queue, &format, &frame_width, 
+				&frame_height, &time_perframe);
+			SetConvertContext(frame_width, frame_height, (AVPixelFormat)format);
 		}
 	}
 
@@ -112,12 +112,15 @@ HRESULT CVCamStream::FillBuffer(IMediaSample *pms)
 		dshow_start_ts = prev_end_ts;
 	}
 
-	if (get_sample)
+	if (get_sample){
 		start_time = dshow_start_ts + (timestamp - obs_start_ts) / 100;
+		duration = time_perframe;
+	}
 	else{
 		int size = pms->GetActualDataLength();
 		memset(dst[0], 127, size);
 		start_time = prev_end_ts;
+		duration = ((VIDEOINFOHEADER*)m_mt.pbFormat)->AvgTimePerFrame;
 	}
 
 	if (queue.header && queue.header->state == OutputStop || get_times > 20){
@@ -127,8 +130,7 @@ HRESULT CVCamStream::FillBuffer(IMediaSample *pms)
 		obs_start_ts = 0;
 	}
 
-	REFERENCE_TIME avg_time= ((VIDEOINFOHEADER*)m_mt.pbFormat)->AvgTimePerFrame;
-	end_time = start_time + avg_time;
+	end_time = start_time + duration;
 	prev_end_ts = end_time;
 	pms->SetTime(&start_time, &end_time);
 	pms->SetSyncPoint(TRUE);
@@ -165,12 +167,15 @@ HRESULT CVCamStream::GetMediaType(int iPosition,CMediaType *pmt)
 	case 1:
 		pvi->bmiHeader.biWidth = 1280;
 		pvi->bmiHeader.biHeight = 720;
+		break;
 	case 2:
 		pvi->bmiHeader.biWidth = 960;
 		pvi->bmiHeader.biHeight = 540;
+		break;
 	case 3:
 		pvi->bmiHeader.biWidth = 640;
 		pvi->bmiHeader.biHeight = 360;
+		break;
 	}
 
 	pvi->AvgTimePerFrame = 333333;
@@ -214,16 +219,26 @@ HRESULT CVCamStream::CheckMediaType(const CMediaType *pMediaType)
 	if (pvi->AvgTimePerFrame < 166666 || pvi->AvgTimePerFrame >1000000)
 		return E_INVALIDARG;
 
-	if (pvi->bmiHeader.biWidth == 1920 && pvi->bmiHeader.biHeight == 1080 ||
-		pvi->bmiHeader.biWidth == 1280 && pvi->bmiHeader.biHeight == 720 ||
-		pvi->bmiHeader.biWidth == 960 && pvi->bmiHeader.biHeight == 540 ||
-		pvi->bmiHeader.biWidth == 640 && pvi->bmiHeader.biHeight == 360 
-		)
-	return S_OK;
+	if (ValidateResolution(pvi->bmiHeader.biWidth, pvi->bmiHeader.biHeight))
+		return S_OK;
 
 	return E_INVALIDARG;
 } 
 
+bool CVCamStream::ValidateResolution(long width,long height)
+{
+	if (width < 320 || height <240)
+		return false;
+	else if (width > 4096)
+		return false;
+	else if (width * 9 == height * 16)
+		return true;
+	else if (width * 3 == height * 4)
+		return true;
+	else
+		return false;
+}
+
 HRESULT CVCamStream::DecideBufferSize(IMemAllocator *pAlloc, 
 	ALLOCATOR_PROPERTIES *pProperties)
 {
@@ -262,21 +277,21 @@ HRESULT CVCamStream::OnThreadDestroy()
 
 HRESULT STDMETHODCALLTYPE CVCamStream::SetFormat(AM_MEDIA_TYPE *pmt)
 {
-	if (CheckMediaType((CMediaType *)pmt) != S_OK) {
+	if (parent->GetState() != State_Stopped)
 		return E_FAIL;
-	}
 
-	VIDEOINFOHEADER *pvi = (VIDEOINFOHEADER *)(pmt->pbFormat);
+	if (CheckMediaType((CMediaType *)pmt) != S_OK)
+		return E_FAIL;
 
-	if (pvi->bmiHeader.biWidth == 1920 && pvi->bmiHeader.biHeight == 1080)
-		GetMediaType(0, &m_mt);
-	else if(pvi->bmiHeader.biWidth == 1280 && pvi->bmiHeader.biHeight == 720)
-		GetMediaType(1, &m_mt);
-	else if (pvi->bmiHeader.biWidth == 960 && pvi->bmiHeader.biHeight == 540)
-		GetMediaType(2, &m_mt);
-	else if (pvi->bmiHeader.biWidth == 640 && pvi->bmiHeader.biHeight == 360)
-		GetMediaType(3, &m_mt);
+	VIDEOINFOHEADER *pvi = (VIDEOINFOHEADER *)(pmt->pbFormat);
+	VIDEOINFOHEADER *pvi_src = (VIDEOINFOHEADER *)m_mt.Format();
 
+	pvi_src->bmiHeader.biWidth = pvi->bmiHeader.biWidth;
+	pvi_src->bmiHeader.biHeight = pvi->bmiHeader.biHeight;
+	pvi_src->bmiHeader.biSizeImage = pvi->bmiHeader.biWidth*
+		pvi->bmiHeader.biHeight * 2;
+	pvi_src->AvgTimePerFrame = pvi->AvgTimePerFrame;
+	m_mt.SetSampleSize(pvi_src->bmiHeader.biSizeImage);
 
 	IPin* pin;
 	ConnectedTo(&pin);
diff --git a/src/virtual-source/virtual-cam.h b/src/virtual-source/virtual-cam.h
index 81000c6..0230c5c 100644
--- a/src/virtual-source/virtual-cam.h
+++ b/src/virtual-source/virtual-cam.h
@@ -3,7 +3,6 @@
 extern "C"
 {
 #include "libswscale/swscale.h" 
-#include "libswresample/swresample.h"
 };
 
 #include "../queue/share_queue.h"
@@ -24,6 +23,7 @@ class CVCam : public CSource
 	static CUnknown * WINAPI CreateInstance(LPUNKNOWN lpunk, HRESULT *phr);
 	STDMETHODIMP NonDelegatingQueryInterface(REFIID riid, void **ppv);
 	IFilterGraph *GetGraph() { return m_pGraph; }
+	FILTER_STATE GetState(){ return m_State; }
 	CVCam(LPUNKNOWN lpunk, HRESULT *phr);
 
 };
@@ -79,8 +79,8 @@ class CVCamStream : public CSourceStream, public IAMStreamConfig,public IKsPrope
 	HRESULT SetMediaType(const CMediaType *pmt);
 	HRESULT OnThreadCreate(void);
 	HRESULT OnThreadDestroy(void);
-
 	HRESULT ChangeMediaType(int nMediatype);
+	bool ValidateResolution(long width, long height);
 	void SetConvertContext(int width, int height, AVPixelFormat fotmat);
 
 
@@ -94,5 +94,9 @@ class CVCamStream : public CSourceStream, public IAMStreamConfig,public IKsPrope
 	uint8_t* dst[1];
 	uint32_t linesize[8];
 	uint32_t dst_linesize[1];
+	int format = 0;
+	int frame_width = 0;
+	int frame_height = 0;
+	int64_t time_perframe = 0;
 	struct SwsContext *convert_ctx = nullptr;
 };