On Mon, 16 Feb 2009 21:28:56 +0100 Thomas Hilber <vdr@xxxxxx> wrote: > On Mon, Feb 16, 2009 at 11:48:50PM +1000, Torgeir Veimo wrote: > > > > On 16 Feb 2009, at 23:29, Tony Houghton wrote: > > > > > And if the video has to be scaled it would have to scale each field > > > separately then reinterlace them line-by-line at the output resolution > > @Tony Houghton: > is it really possible to scale each field separately without producing > artifacts? Isn't deinterlacing always neccessary prior to scaling? > IMHO scaling does imply that even lines are allowed to blur into odd lines > if the scale factor forces this. > > But artifact free blur of both fields is NOT possible if you either > - don't deinterlace prior to scale > or > - keep even and odd fields separated during scale You're right. I was thinking of cases where there's a lot of movement and the fields are from different pictures, forgetting that they can alternatively add detail to static scenes. > > Ok, I guess this single issue implies that vdpau is not fully suitable > > for displaying interlaced material with interlaced output. > > @Torgeir Veimo: > not sure about this. Intel series i9xx graphics is able to scale by > hardware even in interlaced mode. I use this feature for my intel based > frame rate control patches (SCART/RGB/PAL vga-sync-fields patch). VDPAU is currently only on NVidia cards although it's possible Intel and even ATI may provide backends for it in the future. I think only the most recent Intel chipsets support H.264 decoding, does your patch work with those? Once there's a stable API for their H.264 decoding I guess we'll have the best of both worlds :-). -- TH * http://www.realh.co.uk _______________________________________________ vdr mailing list vdr@xxxxxxxxxxx http://www.linuxtv.org/cgi-bin/mailman/listinfo/vdr
