Hi All, I have a compressed AVI file. Can i use OPENCV to decompress the AVI file and read each frame in it? OR should i go for a library like FFMPEG? Can i used FFMPEG functions inside a MFC application to read AVI files? Please help me in this. Thanking you in advance. Regards, ashwath.

Hi , Actually what i am doing is that i have created a MFC dialog based GUI.And i want to extract the frame buffer from the compressed AVI file by decompressing it first and then copying the buffer values to unsigned char array and display on a picture control as a bitmap image.And i want to extract all the files in the compressed AVI file in this way and display one by one on the picture control on the MFC GUI. Is it possible to do the above. Please guide me on this. Thanking in advance, ashwath.

Hi , Thanks for ur suggestion.I have two AVI files.One is compressed and the other is uncompressed.I want to extract the frames from both the AVI files.Will the FFMPEG library work for both compressed and uncompressed AVI files? Please suggest me on this. Thanking you in advance, Ashwath.

Thanks a lot for your reply.

Hi , Thanks for your reply. My aim is to decompress the AVI file and extract each frames pixel values into an array for futher processing. Is it possible with FFMPEG or using IDecompress function? Please do let me know. Thanks, ashwath.

HI, I saw the link but it is not helping me.I have to first decompress the compressed AVI file and then extract individual frames from that decompressed AVI file. Could you please help me in this. Thanking in advance, Ashwath.

Hi All, I want to extract frames from a compressed AVI video file. I have used WIN32 Apis such as "AVIStreamGetFrameOpen" to extract frames from a uncompressed AVI video file.But for a compressed AVI video file the API "AVIStreamGetFrameOpen" returns NULL.Are there APIs to extract frames from a compressed AVI as well as uncompressed AVI file. Please let me know. Thanking in advance, ashwath.

Hi All, I am running an application which is a form view application.I am allocating memory of size 160kb in a for loop .I am allocating memory at the begining of for loop for each iteration and freeing it at the end of each iteration.I have 133 such iteration.But i am facing a problem.In the 9th iteration when i am trying to allocate a memory using malloc the application crashes. I am getting the following messsage in the output window.

HEAP[TEST.exe]: HEAP: Free Heap block 3f277a8 modified at 3f27850 after it was freed

I am getting the following messages in the call stack window:

ntdll.dll!7c90120e()
[Frames below may be incorrect and/or missing, no symbols loaded for ntdll.dll]
ntdll.dll!7c96e139()
ntdll.dll!7c94b535()
ntdll.dll!7c927573()
ntdll.dll!7c91005d()
ntdll.dll!7c927784()
ntdll.dll!7c927573()

TEST.exe!_heap_alloc_base(unsigned int size=160036) Line 105 + 0x28 bytes C
TEST.exe!_heap_alloc_dbg_impl(unsigned int nSize=160000, int nBlockUse=1, const char * szFileName=0x00000000, int nLine=0, int * errno_tmp=0x015cf02c) Line 427 + 0x9 bytes C++
TEST.exe!_nh_malloc_dbg_impl(unsigned int nSize=160000, int nhFlag=0, int nBlockUse=1, const char * szFileName=0x00000000, int nLine=0, int * errno_tmp=0x015cf02c) Line 239 + 0x19 bytes C++
TEST.exe!_nh_malloc_dbg(unsigned int nSize=160000, int nhFlag=0, int nBlockUse=1, const char * szFileName=0x00000000, int nLine=0) Line 296 + 0x1d bytes C++
TEST.exe!malloc(unsigned int nSize=160000) Line 56 + 0x15 bytes C++
TEST.exe!TEST_IDP_FUNC1(unsigned char * pucSrcImg=0x07200068, unsigned char * pucDstImg=0x059d4d68, unsigned short uiSrcRows=400, unsigned short uiSrcCols=400, TBoundBox * pstBoundBox=0x05bd8318) Line 529 + 0x11 bytes C
TEST.exe!TEST_IDP_FUNC2(unsigned char * pucSrcImg=0x05aecc58, unsigned char * pucDstImg=0x03f00690, unsigned short uiSrcRows=400, unsigned short uiSrcCols=400, unsigned short uiDstRows=400, unsigned short uiDstCols=400, TBoundBox * pstBoundBox=0x05bd8318) Line 4117 + 0x1b bytes C
TEST.exe!CTEST::FUNC3(CTESTImage * objSrcImage=0x03e726c8, CTESTImage * objDstnImage=0x03e7a050, unsigned char * pucDstImg=0x03f00690) Line 107 + 0x25 bytes C++
TEST.exe!CTESTView::FUNC4() Line 8346 C++
TEST.exe!_AfxDispatchCmdMsg(CCmdTarget * pTarget=0x0039c900, unsigned int nID=32902, int nCode=0, void (void)* pfn=0x00401276, void * pExtra=0x00000000, unsigned int nSig=57, AFX_CMDHANDLERINFO * pHandlerInfo=0x00000000) Line 82 C++
TEST.exe!CCmdTarget::OnCmdM

Hi All, I want to display a large bitmap inside a picture control.I want the picture control to display the vertical and horizontal scroll bars automatically when the image size is larger than the picture control.How do i achieve this.Please help. Thanking all in advance, Ashwath.

Please let me know if we can use CImage code in VS2008. Thanks, Ashwath.

I have displayed a bitmap on the screen.Now i want to save it in the harddisk after performing some painting operations on it.How do i achieve this?Please help. Thanking you in advance, Ashwath.

Hi ALL, I am using MS Visual Studio 2008 to develop a MFC application.When compiling i am getting the following errors.Please help me fix these. Error 14 error LNK2005: __wfopen already defined in libcmt.lib(wfopen.obj) MSVCRT.lib USMIF Error 15 error LNK2005: _fclose already defined in libcmt.lib(fclose.obj) MSVCRT.lib USMIF Error 16 error LNK2005: _fread already defined in libcmt.lib(fread.obj) MSVCRT.lib USMIF Error 17 error LNK2005: _fwrite already defined in libcmt.lib(fwrite.obj) MSVCRT.lib USMIF Error 18 error LNK2005: _fseek already defined in libcmt.lib(fseek.obj) MSVCRT.lib USMIF Error 19 error LNK2005: _ftell already defined in libcmt.lib(ftell.obj) MSVCRT.lib USMIF Error 20 error LNK2005: _fflush already defined in libcmt.lib(fflush.obj) MSVCRT.lib USMIF Error 21 error LNK2005: _feof already defined in libcmt.lib(feoferr.obj) MSVCRT.lib USMIF Error 22 error LNK2005: _ferror already defined in libcmt.lib(feoferr.obj) MSVCRT.lib USMIF Error 23 error LNK2005: _free already defined in libcmt.lib(free.obj) MSVCRT.lib USMIF Error 24 error LNK2005: _calloc already defined in libcmt.lib(calloc.obj) MSVCRT.lib USMIF Error 25 error LNK2005: __swprintf already defined in libcmt.lib(swprintf.obj) MSVCRT.lib USMIF Thanking in advance , ashwath

Hi All, I am creating a formview application in MFC.I have added some normal controls on it like buttons,checkboxs etc.I have also added Microsoft Forms 2.0 command buttons(ActiveX Controls) on it.The problem i am facing is that, when i add the WM_PAINT handler to the CFORMVIEW class and run the application,the activex controls are not getting displayed on the form. Kindly help me in this. Thanking you in advance, Ashwath.

Hi All, I have created a MFC application with CFormView as the base class in Visual Studio 2008.The problem i am facing is that inspite of me having the below code

m_pMainWnd->ShowWindow(SW_SHOWMAXIMIZED);

m_pMainWnd->UpdateWindow(); when the aplication starts up it is not shown as maximized window. Please help me in this. Thanking in advance, Ashwath.

Hi ALL, Which one is easier to develop a GUI.Is it VC++(MFC) or is it VC++/CLI(i.e.VC++.NET).Please advice. Thanks, ashwath.

Does DirectX libraries get installed when we install Microsoft Visual Studio 2008?

Thanks.... I went to the references,from there i found the following references, Microsoft.DirectX.Direct3D Microsoft.DirectX.Direct3DX etc... Does the availability of above references mean that when we install .Net framework in the computer,that time itself the references are added and i do not need to install the directx SDK. Please clarify, thanks, ashwath

Hi All, Do we have DirectX support in C#.Net? If not ,do i need to install latest Directx SDK? Please advice. Regards, Ashwath

Yes, i have choosen the "windows forms application"(Managed c++/cli) type project in the "new project" menu.This is built on top of .Net framework right? Please advice, thanks, Ashwath

Hi ALL, Whats the difference between Managed DirectX Apis and UnManaged DirectX Apis.Do they come with two different SDKs.One SDK as Managed DirectX SDK and as UnManaged DirectX SDK. Thanking in advance, Ashwath.