On Wed, Jul 10, 2002 at 04:42:20PM +0000, Gerd Knorr wrote: > > Sure. I just declared a new wait queue and changed VIDIOCSYNC to use this > > queue when called with the parameter '-1'. > > Ok, I see. How do you sync with the matrox card then? Do you have a > userspace app which does that job? Yes. I use DirectFB where the v4l video provider notifies the matrox driver of the field change. So the cards aren't really synced together and that might cause some artifacts. The G400 docs say this: "For de-interlaced conversion, subpixel compensation is applied on the lower field". So I suppose that if the field changes aren't registered the image looks either unmodified or too blocky depending on which field the hardware thinks is being displayed. I haven't really tested if this is true. But without the field syncing the image did look a bit blocky to me. -- Ville Syrjälä syrjala@xxxxxx http://www.sci.fi/~syrjala/
