AVI Video and Compression

# Include <windows. h>
# Include <VFW. h>
# Pragma comment (Lib, "vfw32.lib ")

Int main (INT argc, char * argv [])
{
Int m_imagewidth, m_imageheight;
Int frames = 1;
M_imagewidth = 100;
M_imageheight = 100;
Char buffer [100*100*4];
Memset (buffer, 1, sizeof (buffer ));

Avifileinit (); // Initialization

Pavifile;
Char filename [] = "A. Avi ";
Pavistream pvideostream;

If (avifileopen (& pavifile, filename, of_create | of_write, null ))
{
MessageBox (null, "avifileopen error", "error", mb_ OK );
Return 0;
}
 
Avistreaminfo avistreaminfow;
Memset (& avistreaminfow, 0, sizeof (avistreaminfow ));
Avistreaminfow. fcctype = streamtypevideo;
Avistreaminfow. dwrate = 1;
Avistreaminfow. dwscale = 1;
Avistreaminfow. dwsuggestedbuffersize = m_imageheight * m_imagewidth * 32;
Avistreaminfow. rcframe. Bottom = m_imageheight;
Avistreaminfow. rcframe. Right = m_imagewidth;
Strcpy (avistreaminfow. szname, filename );
 
Avifilecreatestream (pavifile, & pvideostream, & avistreaminfow );

 

Avicompressoptions options;
Avicompressoptions * aoptions [1] = {& options };
Memset (& options, 0, sizeof (options ));

// Avisaveoptions (null, 0, 1, & pvideostream, aoptions );
DWORD Params = 75;
// Char a [4];
// Memcpy (A, & options. fcchandler, 4 );
Options. fcctype = ictype_video;
Options. fcchandler = mmiofourcc ('I', 'V', '4', '1'); // mmiofourcc ('I', 'V', '4 ', '1 ');
Options. dwquality = 2000;
Options. dwflags = 8;
Options. lpparms = 0;
Options. cbparms = 0;

Pavistream pcompressedstream;
Avimakecompressedstream (& pcompressedstream, pvideostream, aoptions [0], null );

Bitmapinfoheader BMP infoheader;
Memset (& BMP infoheader, 0, sizeof (BMP infoheader ));
BMP infoheader. bisize = sizeof (BMP infoheader );
BMP infoheader. biheight = m_imageheight;
BMP infoheader. biwidth = m_imagewidth;
BMP infoheader. bibitcount = 32;
BMP infoheader. bicompression = bi_rgb;
BMP infoheader. biplanes = 1;

If (0! = Avistreamsetformat (pcompressedstream, 0, & BMP infoheader, sizeof (BMP infoheader )))
{
MessageBox (null, "setformat", "A; lsdkf", mb_ OK );
Return 0;
}
 
// Avistreamsetformat (pvideostream, 0, & BMP infoheader, sizeof (BMP infoheader ));
For (INT I = 0; I <1000; I ++)
{
// Avistreamwrite (pvideostream, frames * 5, 1, buffer, sizeof (buffer), aviif_keyframe, null, null );
Avistreamwrite (pcompressedstream, frames, 1, buffer, sizeof (buffer), aviif_keyframe, null, null );
Memset (buffer, I * 20 + 50, sizeof (buffer ));
Frames ++;
}
// Pcompressedstream-> release ();
If (pvideostream)
{
Pvideostream-> release ();
Pvideostream = NULL;
}
If (pavifile)
{
Avifileclose (pavifile );
Pavifile-> release ();
Pavifile = NULL;
}

Avifileexit (); // release the database
Return 0;
}

Options. fcchandler settings are closely related to the size of the video window. If the ratio is out of proportion, illegal access occurs when the format is set, or the size of the video file saved is 0, after debugging for a day, I found the problem. The fcchandler value can be set according to the fcchandler value obtained in avisaveoptions, and then converted into a 4-character array, which is easy to understand. Haha!

I still don't understand how icxx series functions compress videos