Hi, I'm working on a project that is being ported from Redhat6.0 to redhat 7.2 One of the requirements of the project is that a set amount of footage from a camera is stored on disk, to be played back at any time, however it must be dispalyed and look good at full screen size (blah de blah de blah). Anyway, we currently use a set of BT848 cards (reported by the API as BT848A Unknown) with which we had specially modified the bttv driver to rewrite the microcode on the cards to scale the input to our desired size. Porting this driver to 7.2 is probably a lot more effort than is worthwhile, especially as any change in hardware will require the code being rewritten again for each change in hardware. I noticed in the API that cards can return the VID_TYPE_SCALES indicating that the hardware is capable of scaling the image internally (exactly what we ahve been doing but manually). Does anybody have any information on what routes through the API there are to enable and setup this hardware scaling? If anybody has any other information about scaling or more tutorials about how the v4l API works then that would also be greatly appreciated Thanks in advance Information - Previous Generation BT848 Card, modified bttv.o, possibly a lot more modifcations that nobody will bother telling me until the day before the project is due, Redhat 6.0, display using SVGAlib and an internal graphics library New Generation Redhat 7.2, display using X with SDL and a (hopefully) rewritten internal graphics library Possibly a variety of Capture cards, however each must support Hardware Scaling. --- Michael Spall
