/// <summary>
/// Version of <see cref="AVISaveOptions(IntPtr, int, int, IntPtr[], IntPtr[])"/> for one stream only.
/// </summary>
///
/// <param name="stream">Stream to configure.</param>
/// <param name="options">Stream options.</param>
///
/// <returns>Returns TRUE if the user pressed OK, FALSE for CANCEL, or an error otherwise.</returns>
public static int AVISaveOptions(IntPtr stream, ref AVICOMPRESSOPTIONS options, IntPtr parentWindow)
{
IntPtr[] streams = new IntPtr[1];
IntPtr[] infPtrs = new IntPtr[1];
// alloc unmanaged memory
IntPtr mem = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(AVICOMPRESSOPTIONS)));
// copy from managed structure to unmanaged memory
Marshal.StructureToPtr(options, mem, false);
streams[0] = stream;
infPtrs[0] = mem;
// show dialog with a list of available compresors and configuration
int ret = AVISaveOptions(parentWindow, 0, 1, streams, infPtrs);
// copy from unmanaged memory to managed structure
options = (AVICOMPRESSOPTIONS)Marshal.PtrToStructure(mem, typeof(AVICOMPRESSOPTIONS));
// free AVI compression options
AVISaveOptionsFree(1, infPtrs);
// clear it, because the information already freed by AVISaveOptionsFree
options.format = 0;
options.parameters = 0;
// free unmanaged memory
Marshal.FreeHGlobal(mem);
return ret;
}
public static extern int AVIMakeCompressedStream(out IntPtr compressedStream, IntPtr sourceStream, ref AVICOMPRESSOPTIONS options, IntPtr clsidHandler);