Billy Biggs writes: > Mike Frisch (mfrisch@xxxxxxxxxx): > > > > This whole issue of field-orientation is a messy business, and this effect > > > does depend on whether the original video is field-based. Often its > > > frame-based, like film - in which case these problems aren't so obvious. > > > > I presume this is a non-issue if I was to use a progressive scan capable > > television set? > > You'd still get judder. > > > Many HTPC users have their PCs connected directly to front projectors > > (using a progressive scan mode) and do not complain of these problems, > > so I presume it's simply an issue of an interlaced display. > > Because everything they output is progressive, so they have to > deinterlace. And most reasonable Windows apps for high quality video > sync to the vertical refresh which is difficult under Linux (for > example, dScaler does). > > > > I just put up with this at the moment - but more power to Billy with > > > efforts to fix it properly. Though my approach would probably be to > > > work on XVideo to provide a hook into the physical VSYNC. > > > > Sounds like this is a non-trivial update to the X server. > > Yeah, which needs more discussion as to what best to do. I wish more > developers were interested in it. > AFAIK, DirectFB supports deinterlacing for v4l devices and seems to me a better choice for a VDR than X11. Now, it even supports OpenGL according to their latest log. Have a look at directfb.org. Marcus
