Comments by J.Surjith Kumar (Top 125 by date)

I gone through this link before i ask this question.

Have you heard about mp4box which is a command tool if you want to merge more than 100 videos at the same time this scenario will come, the path of the video is larger you can't change that.

The video was cutting at every 5th second even though i try to cut in the middle. For example if i give 3rd second as the starting position to cut the video its cutting the video from the 5th second like wise if i give 8th second as the starting position its cutting the video from the 10th second. I don't know why it is happening. can you help me!

Thank you for your solution. I hope you have an experience with working in ffmpeg, can you tell me how to check out the time stamp frequency in the source video and how to increase the frequency of it. Do you have any direct command to execute this!?

How i can get the format of the video!?

I tried by creating the glass panel for each and every drawings dynamically but when i play the video, the shapes which i drawn over the glass panel was flickering.

Thanks for your valuable reply.. Can you give me any link or sample codes regarding this, it will be more useful for me to proceed further.

It won't work in the windowless mode right!?

Ya but am not getting the result. It's returning E_NoInterface.

This is not the good attitude to reply for the expert comments. They are asking you to elaborate what you exactly want. I think you need an edit box which has to look like an image am i right!?

Thank you Maxim :)

ya i got the source code. I'll go through that.

From where i can download the ffdshow source code.

FFDShow is the 3rd party filter.

For Video Mixing renderer there are interfaces which is consists of methods to configure the properties. But i don't know for this decoder.

Is there any specific interface for ffdshow video decoder!?

There is all about the description of the FFDShowVideoDecoder Configuration. Am not getting how to access it from the application.

This is that property image link "http://ffdshow-tryout.sourceforge.net/wiki/_detail/devel:remote_api.png?id=devel%3Acontrolling" in that i need to select and edit the crop field from my application itself.

I don't know whether any specific interface was there to configure the ffdshow filter properties.

I know the interface guid and am using FFDShowVideoDecoder filter in this i need to edit the crop field values.

Why you posted this as the solution???

Still waiting for the solution!!

MPEG4(AVC)

my 5.

Thank you for your comment, Still not getting what i want.

Thanks for your comment. Can you give me any reference!?

my 5.

my 5.

Are you using Directshow?

why are you posting the same question again and again?

Thank You Maxim I got the value:)

I am explicitly configure the VMR for the windowless mode so am not getting the Average time per frame. How to solve this?

using directshow?

How to achieve that by using directshow!?

Its all about bitmaps. How to play the video in a memory dc!?

Can you give me any reference regarding your solution.

Ya got it, I did a mistake now i changed it but rather than display the image which was loaded, it displays the screen shot. Dont know how it came.

That is IVMRMixerBitmap9 interface.
http://msdn.microsoft.com/en-us/library/windows/desktop/dd390451(v=vs.85).aspx

pMixerBmp->SetAlphaBitmap(&alphaBitmap);//Exception throws here

Explain in detail. Improve question is there to edit the question.

Try google..

Good Explanation my 5.

Why you'r posting the same thing again and again in different question name.

Be specific about what you want.

Don't expect anyone to read the entire code and create the test cases for your code. Be specific about what you want.

If you have any trouble with your code post here and tell where you'r getting trouble.

ya i know that, i just checked whether the video was played in the picture box or not.

Thanks for your solution it helps me to get the result.

Maxim Kartavenkov solution helped me to resolve from this. Very thankful to him :)

May i know where it went wrong??

Definition of InitwindowLessVMR:

HRESULT InitWindowlessVMR(
HWND hwndApp, // Window to hold the video.
IGraphBuilder* pGraph, // Pointer to the Filter Graph Manager.
IVMRWindowlessControl** ppWc // Receives a pointer to the VMR.
)
{
if (!pGraph || !ppWc)
{
return E_POINTER;
}
IBaseFilter* pVmr = NULL;
IVMRWindowlessControl* pWc = NULL;
// Create the VMR.
HRESULT hr = CoCreateInstance(CLSID_VideoMixingRenderer, NULL,
CLSCTX_INPROC, IID_IBaseFilter, (void**)&pVmr);
if (FAILED(hr))
{
return hr;
}

// Add the VMR to the filter graph.
hr = pGraph->AddFilter(pVmr, L"Video Mixing Renderer");
if (FAILED(hr))
{
pVmr->Release();
return hr;
}
// Set the rendering mode.
IVMRFilterConfig* pConfig;
hr = pVmr->QueryInterface(IID_IVMRFilterConfig, (void**)&pConfig);
if (SUCCEEDED(hr))
{
hr = pConfig->SetRenderingMode(VMRMode_Windowless);
pConfig->Release();
}
if (SUCCEEDED(hr))
{
// Set the window.
hr = pVmr->QueryInterface(IID_IVMRWindowlessControl, (void**)&pWc);
if( SUCCEEDED(hr))
{
hr = pWc->SetVideoClippingWindow(hwndApp);
if (SUCCEEDED(hr))
{
*ppWc = pWc; // Return this as an AddRef'd pointer.
}
else
{
// An error occurred, so release the interface.
pWc->Release();
}
}
}
pVmr->Release();
return hr;
}

It works when i tested in new mfc application but not in c#.

Before the video was played in the separate window which is the windowed mode now am trying to play the video in the window less mode. So that i added the IVMRWindowlessControl interface to write the video in the picture box. hr = InitWindowlessVMR(hwnd, pGraph, &pWc); is used to initialize the vmr. GetClientRect(hwnd,&rcDest); rcDest is consists of the picture box rectangle coordinates. I am clear with the code but am asking whether this idea will work or not!? If not what i have to do!?

I pasted the code from my program.

That dll having this c++ function:
#include "RenderVideoFile.h"
void RenderFile(WCHAR *strFilename,HWND hwnd)
{
.
.
.
.
}

Calling that function from c#:
[DllImport("C:\\RenderVideoFile.dll",CharSet=CharSet.Unicode)]
public static extern void RenderFile(string strFilename,IntPtr hwnd);
.
.
.
RenderFile("C:\\123.avi",pictureBox1.Handle);

But the video was not played in the picture box i have passed the picture box handle as the parameter but it doesn't work. What i have to do

Ya now it's playing.. Thank you Maxim..

I tried this. But getting the same "Error-could not initialize the com library".

And am doing it in windows application not in web.

I am asking to play the video using c# by accessing the function from dll.

Put the dll inside the c# file and give that location in the dllimport and execute it.

Is that possible to play the video like this?

I executed this program it shows that "Error-could not initialize the com library". I dont know why the CoInitialize() was failed.

Ok i posted that in new question.

Can you tell me reason for the 2nd question!!

The link of the articles which is in the solution helped me to get more knowledge regarding my question and it helped me to got the result.

Got it.. Thankyou

This article helps me a lot.. Thankyou

This article helps me a lot.. Thankyou

I have to create the dll using c++ which consists of many classes and their functions. How to use that classes and function in c#.

By that code i created lib and dll files. I can access that class in mfc application.

Am doing it in MFC.

Thanks for the valuable information.

Thank You. Got the result

The code which is above is the right code. I found out small mistake in my code and now it works as i expected.

Thanks Richard Its working :)

now im trying to save only the CArray object ptAr but it shows the same kind of error.

ok can you give me some example.

i included this header

help me out to resolve from these errors.

I got the result by using CArray.
here is my code..

CArray<cpoint,cpoint> ptAr;
ptAr.Add(CPoint(0,0));
ptAr.Add(CPoint(10,10));
CPoint *pCp = (CPoint*)ptAr.GetData();
pDC->Polyline( pCp, ptAr.GetSize() );

I got this working to draw the lines dynamically.

but in the serialization im getting an error.

void CserializationTest3Doc::Serialize(CArchive& ar)
{
if (ar.IsStoring())
{
// TODO: add storing code here
ar<<pCp<<ptAr;
}
else
{
// TODO: add loading code here
ar>>pCp>>ptAr;
}
}

error C2678: binary '<<' : no operator found which takes a left-hand operand of type 'CArchive' (or there is no acceptable conversio)

error C2679: binary '>>' : no operator found which takes a right-hand operand of type 'CPoint *' (or there is no acceptable conversion)

warning C4800: 'CPoint *' : forcing value to bool 'true' or 'false' (performance warning)

atlast it shows the only error C2248: 'CObject::CObject' : cannot access private member declared in class 'CObject'

ok now it shows only list is undeclared.

ok finally it shows only list as undeclared

It shows an error as undeclared it,iteration,list and vector.

I need to know how to collectively store the points and draw the lines using moveto and lineto functions. For every OnLButtonDown and OnLButtonUp one line have to be drawn. Finally collections of lines will be drawn how to store all the lines and how to use serialize concept according to that.

How the serialize function knows that the object ar is for storing or loading. Can u explain how it works internally in the doc/view architecture without creating the CFile object and CArchive object.

If i give Invalidate(FALSE) in the OnLButtonUp function. Multiple lines can be drawn but when i resize the window the lines which is drawn last is only shown.

Have u given any example code anywhere regarding this issues.

There is no error but the value of that variable was not retrieved when i open the file.

Im using that variables in the view class..

void CserializationTestView::OnLButtonDown(UINT nFlags, CPoint point)
{
// TODO: Add your message handler code here and/or call default
l[0]=point.x;
l[1]=point.y;
flag=1;
CView::OnLButtonDown(nFlags, point);
}

void CserializationTestView::OnLButtonUp(UINT nFlags, CPoint point)
{
// TODO: Add your message handler code here and/or call default
CClientDC dc(this);
PtLine=CPoint(point.x,point.y);
/*if(flag==1)
{
dc.MoveTo(l[0],l[1]);
dc.LineTo(PtLine);
}*/
Invalidate();
CView::OnLButtonUp(nFlags, point);
}

void CserializationTestView::OnDraw(CDC* pDC)
{
CserializationTestDoc* pDoc = GetDocument();
ASSERT_VALID(pDoc);
pDC->MoveTo(l[0],l[1]);
pDC->LineTo(PtLine);

// TODO: add draw code for native data here
}

I used Invalidate() in the OnLButtonUp() function which invalidates the entire client area for every time it has been called. So that i cant draw multiple lines for that i need a solution.

will u give me some practical example.

When i click the '+' its showing (65 L'A').

In that it showing m_hWnd unused. error:expression cannot be evaluated.

Thank you Jochen Arndt for responding from the beginning. Im doing all corrections what ur telling in my program but am still getting that "Debug assertion failed".

This is my OnMove() function code:

void CTickCounterDlg::OnMove(int x, int y)
{
CDialog::OnMove(x, y);
// TODO: Add your message handler code here
CRect dialogRect;
GetWindowRect(&dialogRect);
wchar_t *a=new wchar_t[50];
wsprintf(a,L"After move: x = %d, y = %d, width = %d, height = %d",
dialogRect.left, dialogRect.top, dialogRect.Width(), dialogRect.Height());
m_PointSize.SetWindowTextW(a);
}

I pressed the retry button.

Its pointing to the winocc.cpp

void CWnd::SetWindowText(LPCTSTR lpszString)
{
ENSURE(this);
ENSURE(::IsWindow(m_hWnd) || (m_pCtrlSite != NULL));

if (m_pCtrlSite == NULL)
::SetWindowText(m_hWnd, lpszString);
else
m_pCtrlSite->SetWindowText(lpszString);
}

How to find out the solution for that problem.

The application runs well when i press the ignore button at that "Debug assertion failed" dialog box.

Im using static control(Label). I changed the member variable from CString to CStatic.

I clearly understood, everything was fine but im getting "Debug assertion failed" when im executing it.

And i should not use the UpdateData(FALSE) because it will refresh all other controls at the same time. For this case what should i do.

If i use UpdateData(FALSE) at the end of the statement it shows debug assertion failed.

Ok i got it. The only problem is that the value is not updating in the controls what im using to display in the dialog box.

my dialog box is at the center but it showing x and y position as 0. And the value is not updated.

ThankYou BadJerry its working :)

If i add UpdateData(TRUE) at the beginning of OnTimer the message box will popup automatically even the start button was not pressed.

I have to enter the value at the run time. To make only that text control not to refresh what i have to do.

no its not working dude..

UpdateData(); is same as UpdateData(TRUE);

By default UpdateData() is TRUE.

Bro i almost created but i need to know that how to pass the content from one rectangle to another.. I tried to this level.. Here is my code.. tell me where i should improve that will be useful for me to proceed further..
code:
#include <windows.h>
//#define MAXPOINTS 1000
LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
PSTR szCmdLine, int iCmdShow)
{
static TCHAR szAppName[] = TEXT ("Checker1") ;
HWND hwnd ;
MSG msg ;
WNDCLASS wndclass ;
wndclass.style = CS_HREDRAW | CS_VREDRAW ;
wndclass.lpfnWndProc = WndProc ;
wndclass.cbClsExtra = 0 ;
wndclass.cbWndExtra = 0 ;
wndclass.hInstance = hInstance ;
wndclass.hIcon = LoadIcon (NULL, IDI_APPLICATION) ;
wndclass.hCursor = LoadCursor (NULL, IDC_ARROW) ;
wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ;
wndclass.lpszMenuName = NULL ;
wndclass.lpszClassName = szAppName ;
if (!RegisterClass (&wndclass))
{
MessageBox (NULL, TEXT ("Program requires Windows NT!"),
szAppName, MB_ICONERROR) ;
return 0 ;
}
hwnd = CreateWindow (szAppName, TEXT ("Checker1 Mouse Hit-Test Demo"),
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT,
CW_USEDEFAULT, CW_USEDEFAULT,
NULL, NULL, hInstance, NULL) ;
ShowWindow (hwnd, iCmdShow) ;
UpdateWindow (hwnd) ;
while (GetMessage (&msg, NULL, 0, 0))
{
TranslateMessage (&msg) ;
DispatchMessage (&msg) ;
}
return msg.wParam ;
}
LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
static int cxBlock, cyBlock ;
static POINT pt ;
static int iCount ;
HDC hdc ;
int x, y, i, j ;
PAINTSTRUCT ps ;
RECT rect ;
int *SrcRect,*DestRect ;
switch (message)
{
case WM_SIZE :
cxBlock = LOWORD (lParam) ;
cyBlock = HIWORD (lParam) ;
return 0 ;
case WM_LBUTTONDOWN:
iCount = 0 ;
rect.left = 0 ;
rect.top = 0 ;
rect.right =cxBlock ;
rect.bottom =cyBlock ;
InvalidateRect (hwnd, &rect, TRUE) ;
return 0 ;
case WM_MOUSEMOVE:
if (wParam & MK_LBUTTON)
{
pt.x = LOWORD (lParam) ;
pt.y = HIWORD (lParam) ;
hdc = GetDC (hwnd) ;
SetPixel (hdc, LOWORD (lParam), HIWORD (lParam), 0) ;
ReleaseDC (hwnd, hdc) ;
}
return 0 ;
case WM_LBUTTONUP:
CopyRect (&DestRect, &SrcRect) ;
InvalidateRect (hwnd, NULL, TRUE) ;
return 0 ;
case WM_PAINT :
hdc = BeginPaint (hwnd, &ps) ;
SrcRect=Rectangle (hdc, 0, 0, cxBlock, cyBlock) ;
SetCursor (LoadCursor (NULL, IDC_WAIT)) ;
ShowCursor (TRUE) ;
MoveToEx (hdc, pt.x, pt.y, NULL) ;
LineTo (hdc, pt.x, pt.y) ;
ShowCursor (TRUE) ;
SetCursor (LoadCursor (NULL, IDC_ARROW)) ;
DestRect=Rectangle(hdc,0,0,200,200);
EndPaint (hwnd, &ps) ;
return 0 ;
case WM_DESTROY :
PostQuitMessage (0) ;
return 0 ;
}
return DefWindowProc (hwnd, message, wParam, lParam) ;
}

Thankyou!:) If the me class has member data and functions then how to do it!?

I got this question in the interview and they told that there is a technique to solve this.