Yes, I have already thought to this solution But I need to display at least 30 frame per seconds in a image format of 640x512 without overloading the CPU. My idea consists to write the data in "the video driver" like V4L and then display the data in the overlay of the graphic card. I suppose that I can directly show the overlay's image in a XWindow. I need apply some transformations like magnifying, inverting, gamma correction and so on. I think do that by using the graphics card features, but I don't know
how, perhaps by using the openGL's functionnalies. My problem is to find documentation on video display on linux, how does it work ? I'm looking for documentations about the video displaying under linux and on the programmation of the graphics card features. Do you have a clues for me ? Thanks --Franco transformation by using the feature of the graphics card. > On Thu, 10 Oct 2002, Franco Bevilacqua wrote: > > > > > The format acquired from the DSP board are gray levels (0..255). > > The data come from the DSP board's driver continuously. > > > > I'm assuming you mostly just want to take a raw greyscale > image and display it on the screen with scaling. > > I'd recommend using OpenGL. Draw a textured quad. That would > be a LUMINANCE texture that you could update with glTexSubImage2D. > > Mark. > > > > > Mark Vojkovich wrote: > > > > > On Wed, 9 Oct 2002, Franco Bevilacqua wrote: > > > > > > > Hi all, > > > > I'm a newbie in developpment of video under linux. > > > > Where can I find docs and tutorials to program video under linux ?? > > > > I need to display video on a XWindow starting from raw data (not > > > > compressed ) acquired on DSP card. > > > > I need also to apply some filters on the raw data, like interpolation. > > > > Does anybody has can give me some inputs ? > > > > In advance thanks. > > > > -Franco > > > > > > What format is your data in? YCbCr, I assume. Planar? Packed? > > > > > > Mark. > > > _______________________________________________ > > > Xpert mailing list > > > [EMAIL PROTECTED] > > > http://XFree86.Org/mailman/listinfo/xpert > > > _______________________________________________ > Xpert mailing list > [EMAIL PROTECTED] > http://XFree86.Org/mailman/listinfo/xpert _______________________________________________ Xpert mailing list [EMAIL PROTECTED] http://XFree86.Org/mailman/listinfo/xpert
