/// <summary>Opens an AVI file and creates a GetFrame object</summary>
/// <param name="fileName">Name of the AVI file</param>
public void Open(string fileName)
{
//Intitialize AVI library
Avi.AVIFileInit();
//Open the file
int result = Avi.AVIFileOpen(
ref aviFile, fileName,
Avi.OF_SHARE_DENY_WRITE, 0);
if (result != 0)
{
throw new Exception("Exception in AVIFileOpen: " + result.ToString());
}
//Get the video stream
result = Avi.AVIFileGetStream(
aviFile,
out aviStream,
Avi.StreamtypeVIDEO, 0);
if (result != 0)
{
throw new Exception("Exception in AVIFileGetStream: " + result.ToString());
}
firstFrame = Avi.AVIStreamStart(aviStream.ToInt32());
countFrames = Avi.AVIStreamLength(aviStream.ToInt32());
streamInfo = new Avi.AVISTREAMINFO();
result = Avi.AVIStreamInfo(aviStream.ToInt32(), ref streamInfo, Marshal.SizeOf(streamInfo));
if (result != 0)
{
throw new Exception("Exception in AVIStreamInfo: " + result.ToString());
}
//Open frames
Avi.BITMAPINFOHEADER bih = new Avi.BITMAPINFOHEADER();
bih.biBitCount = 24;
bih.biClrImportant = 0;
bih.biClrUsed = 0;
bih.biCompression = 0; //BI_RGB;
bih.biHeight = (Int32)streamInfo.rcFrame.bottom;
bih.biWidth = (Int32)streamInfo.rcFrame.right;
bih.biPlanes = 1;
bih.biSize = (UInt32)Marshal.SizeOf(bih);
bih.biXPelsPerMeter = 0;
bih.biYPelsPerMeter = 0;
getFrameObject = Avi.AVIStreamGetFrameOpen(aviStream, ref bih); //force function to return 24bit DIBS
//getFrameObject = Avi.AVIStreamGetFrameOpen(aviStream, 0); //return any bitmaps
if (getFrameObject == 0)
{
throw new Exception("Exception in AVIStreamGetFrameOpen!");
}
}