Frame Buffer question

[Marcio Calixto Cabral <mcabral@xxxxxxxxxx>]

 Hi there,

 When I issue ioctl(fdVideoDev, VIDIOCGMBUF, &video_mbuf) what does the
size field means? Is it always that size? If I change the palette, is the
size field going to change too?

 Thank's for your help,
 Marcio