That was a handy explanation, I have various companys internal dev guides but nothing I can freely release so I wondered if the BBC would have anything like this publicly available...
http://www.bbc.co.uk/commissioning/branding/picturesize.shtml This has various guide pictures (which comes with the classic test card) for all prospective aspect ratios. I have both native overscan and no overscan tv output cards (dxr3 and old nvidia/ati) and 4:3 and 16:9 tvs. There seems to be some confusion as to the "resolutions" used by the tv. This is more or less a constant being either PAL or NTSC (forgetting the other variations PAL-i, secam etc) irrespective of what the PC is using 800x600, 640x480 it is all scaled to fit the TV standard being used. You can in theory display any resolution you want on a TV 1600x1200 for example, if you have the hardware to scale that far, the problem being the TV is incapable of showing that level of detail. Unless you are showing a low res picture at high res scaled down again for the TV. ----- Original Message ----- From: "Barnowl" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Saturday, January 17, 2004 11:26 PM Subject: Re: [Freevo-users] dxr3 and libSDL > Looks like I have a project to play with this weekend. > > Evan > > > n Fri, 16 Jan 2004 12:17:09 -0400 > Rob Shortt <[EMAIL PROTECTED]> wrote: > > > > > For everyone, this is an important read: http://scanline.ca/overscan/ > > > > Mark Benson wrote: > > > If you are going to use overscan, then the interface should be designed to > > > take into account the TV Safe area. > > > > Freevo does take into account the safe action area and overscan area > > (referring to the area outside of the safe action area). That's what > > OSD_OVERSCAN_X and OSD_OVERSCAN_Y are for. If your tv encoder is > > overscanning ~20 pixels we must make sure not to draw that close to the > > 'edge' of the tv signal. > > > > > ----- Original Message ----- > > > From: "Gray, Tim" <[EMAIL PROTECTED]> > > > > <snip> > > > > >>yes I have, and I also need to make the GUI image smaller somehow. > > > > So, you want to make the safe action area smaller - that is what > > Freevo's overscan settings do. > > > > >>overscan settings will not take negative numbers so those are useless (I > > >>want a -20 setting!) > > > > That is like saying you want Freevo to draw outside of the tv signal > > which doesn't make sense. > > > > Your dxr3 (or any tv output method / encoder / xserver / drivers) is > > responsible for actually overscanning the picture. Many xservers that > > support tv-out also have an overscan setting for this, the same is true > > for some framebuffer drivers, and some just overscan a certain amount > > automatically. > > > > So, if your tv-out is overscanning 30 pixels horizontally and in Freevo > > your OSD_OVERSCAN_X is only set to 20 then freevo will draw things > > outside of your visible tv border, outside of the safe action area. You > > would need at least a value of 30 (probably a bit more) for > > OSD_OVERSCAN_X to make it look right. Our overscan settings really > > determine what Freevo thinks is the safe action area. > > > > >>so yes it works, except that the freevo GUI is overscanning too far. > > > > It sounds like your dxr3 is overscanning too far and you need to tell > > Freevo just how much. > > > > HTH, > > -Rob > > > > > > > > ------------------------------------------------------- > > The SF.Net email is sponsored by EclipseCon 2004 > > Premiere Conference on Open Tools Development and Integration > > See the breadth of Eclipse activity. February 3-5 in Anaheim, CA. > > http://www.eclipsecon.org/osdn > > _______________________________________________ > > Freevo-users mailing list > > [EMAIL PROTECTED] > > https://lists.sourceforge.net/lists/listinfo/freevo-users > > > > > ------------------------------------------------------- > The SF.Net email is sponsored by EclipseCon 2004 > Premiere Conference on Open Tools Development and Integration > See the breadth of Eclipse activity. February 3-5 in Anaheim, CA. > http://www.eclipsecon.org/osdn > _______________________________________________ > Freevo-users mailing list > [EMAIL PROTECTED] > https://lists.sourceforge.net/lists/listinfo/freevo-users > ------------------------------------------------------- The SF.Net email is sponsored by EclipseCon 2004 Premiere Conference on Open Tools Development and Integration See the breadth of Eclipse activity. February 3-5 in Anaheim, CA. http://www.eclipsecon.org/osdn _______________________________________________ Freevo-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/freevo-users
