From: Matthias H. <Mat...@in...> - 2002-01-09 19:26:21
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On Jan 09, 02 08:26:08 -0800, Billy Biggs wrote: > Matthias Hopf (Mat...@in...): > > > My plugin is based on nv-tv-out. What that (and tvtool for windows) > > > does is reprogramming some registers to enable tvout. For tvout an > > > external chip is used (brooktree, chrontel and some others). It > > > doesn't do much more. The rest is just done by the vga driver I > > > think and synchronisation is handled by the tvout chipset. So I > > > think it is correct already. > > > > You missunderstood me. When I'm playing a 25fps video I would really > > like to have it synchronized to the video clock (doing PAL output at > > 25fps as well) than to the system clock (which is - always - slightly > > off). Otherwise I might miss the one or other frame, or some might be > > dublicated. This is not really a hard problem, but I would like to > > have it. > > The problem is even worse when playing field-based material at 50fps > or 59.94fps for NTSC. With tvtime (http://dumbterm.net/graphics/tvtime) > you see nasty judder problems even if you fix tearing unless you're > synced exactly, for example, 59.94fps video when your monitor refresh is > 60.00hz. > > With a tv out driver we need to know the field parity also in order to > play field-based DVDs correctly. My words. Exactly. It isn't field-based DVDs only, SVCDs can be interlaced as well - and I'm creating quite some of them right now... Luckily I have a stand-alone DVD player, so this is not too urgent for me :) Matthias -- Matthias Hopf - Visualization and Interactive Systems Group \ | | /-- IfI, University of Stuttgart, \ | | \ Breitwiesenstr. 20-22, 70565 Stuttgart, Germany \| | --/ Phone +49-711-7816-404 Fax -340 ma...@ms... www.mshopf.de |