C++ code to create QuickTime reference movie

The deliverable is C++ code to create a QuickTime reference movie based on specified input movies. It needs to work on both Windows and the Mac, for video formats that QuickTime supports. The code will be used as part of a larger application, so no user interface is required. We have already written code to do this, but it is not working. We are looking for someone with QuickTime SDK experience to fix and complete the existing code.