Avi* functions not functioning

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Hi,

I'm doing a project which requires manipulating an avi file. I want to do it in C language. I have included the vfw.h header file and the required libraries are there but the avi functions are not working. During compilation no error is shown but I cant run the program, it halts abruptly. I tried to debug. I found that as soon as AVIFileInit() function is encountered, a SIGSEGV segmentation fault occurs.

Even this code is not working:

C++

#include<windows.h>
#include <vfw.h>
#include <stdio.h>
#include <stdlib.h>

void main()
{
printf("Hello\n");
AVIFileInit();
printf("World\n")
}

This compiles without any error but when i run it, it'll only output Hello but after that it'll say "project1.exe has encountered a problem and needs to close". When I tried to debug, found that SIGSEGV segmentation fault is occuring at AVIFileInit(). Could anyone please help me resolve this situation. Why is a simple function like AVIFileInit() not working in a simple program. Where am i going wrong?

Posted 29-Jan-11 19:24pm

Chaithan

Updated 29-Jan-11 19:48pm

Sandeep Mewara

v2

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3 solutions

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Espen Harlinn · Answer 1 · 2011-01-30T02:21:00

Solution 1

This works like a charm:

C++

#include<windows.h>
#include <vfw.h>
#include <stdio.h>
#include <stdlib.h>

#pragma comment(lib,"Vfw32")

void main()
{
    printf("Hello\n");
    AVIFileInit();
    printf("World\n");
    AVIFileExit();
}

Update
If you are using MinGW, use dlltool[^] ,note the details about STDCALL, to generate a new import library from the dll.

Regards
Espen Harlinn

Posted 30-Jan-11 2:21am

Espen Harlinn

Updated 30-Jan-11 3:47am

v3

Comments

Richard MacCutchan 30-Jan-11 8:49am

Just what I did, and no errors. I can only assume that something else is happening on the OP's system.

Espen Harlinn 30-Jan-11 9:00am

Checking the dll was a good thought though, it might even be corrupted ...

Chaithan 30-Jan-11 9:21am

Thanks for the replies. I tried including the pragma. Its still not working. Its infact ignoring the #pragma comment line during compilation.

Espen Harlinn 30-Jan-11 9:28am

try running dumpbin,http://msdn.microsoft.com/en-us/library/c1h23y6c(v=vs.71).aspx, on the dll

Richard MacCutchan · Answer 2 · 2011-01-30T02:31:00

Solution 2

I have just copied your code (corrected) into a simple console app and it compiles, links and runs without error. Are you sure that the Avifil32.dll is present in the correct folder on your system?

Posted 30-Jan-11 2:31am

Richard MacCutchan

Comments

Espen Harlinn 30-Jan-11 8:35am

Good question - odd if it isn't though, when did MS last ship a version of windows that didn't include this by default?

Chaithan 30-Jan-11 9:18am

Its present in C:\WINDOWS\SYSTEM32

Chaithan 30-Jan-11 9:25am

Did you do it in Visual Studio?? I wonder if that has anything to do with this. I'm using CodeBlocks so its MinGW compiler.

Richard MacCutchan 30-Jan-11 11:50am

Ah, sorry all bets are off if you are not using Visual Studio or Visual C++ Express. You may need to add some environment variable for MinGW/CodeBlocks to tell it where the libraries are.

Chaithan · Answer 3 · 2011-02-03T22:04:00

Solution 3

I got Visual studio like Richard said and its working fine. A good suggestion it was to include the #pragma comment by Espen Harlinn, it saves going to the properties and including additional dependancies and all that procedure. Thank you all. :)

Posted 3-Feb-11 22:04pm

Chaithan