On Wednesday 06 March 2002 08:50 pm, Mark Vojkovich wrote: > On Wed, 6 Mar 2002, Chris Nuernberger wrote: > > > Not sure if this is what you want, but why not try: man v4l > > > > That is not what I want. I am compressing images, so I need access to > > that data for an arbitrary amount of time. > > > > I would like to capture to the same buffer that I pass in to xvideo with > > the call of XvShmPutImage. > > > > Basically, to set that all up, you have to get a shared memory segment > > (man shmget) then give it to X (XShmAttach, no man page on my system). > > > > I am trying to either get the bttv driver to use the linux shared memory > > (right now for streaming it uses mmap) system and give me an shmid that I > > can > > It would have to lock those pages down and get a physical address. > mlock should lock them down, but I don't know how to get a physical > address. > > > use and that xvideo can use, or figure out how I can get the shared > > memory system to just set the memory the capture device gave me from the > > mmap call as the shared memory it gives me an ID for. > > That sounds easier, but both probably need kernel hacks. What do you think, Gerd?
