private Avi.AVISTREAMINFO GetStreamInfo(IntPtr aviStream)
{
Avi.AVISTREAMINFO streamInfo = new Avi.AVISTREAMINFO();
int result = Avi.AVIStreamInfo(StreamPointer, ref streamInfo, Marshal.SizeOf(streamInfo));
if(result != 0) {
throw new Exception("Exception in VideoStreamInfo: "+result.ToString());
}
return streamInfo;
}