After being forced to work under MS Windows XP ;), I took the opportunity to compile glv (see this other article about it). It just worked out of the box; thanks MinGW! You can download it from this page if ever you find the use for it (don’t forget GLV does not plays the sound of the movie).
So, the GL super mixer will certainly be cross platform too; Linux, OSX & XP.
By the way, GLV now allows to open TWO files simultaneously and to synchronize the playback per frame; this way, it becomes a stereo movie player !