Re: Text Aspect Ratio & Video Format
Lawrence D'Oliveiro <ldo-kC51rjc0cqs1dNLGKZg6taU/[email protected]>
| Newsgroups | gmane.comp.multimedia.dvdauthor.user |
|---|---|
| Message-ID | <[email protected]> |
On 29/07/10 21:12, Elio Blanca wrote: >>> Is this attribute useful for menu anyway? >> >> Yes. As explained in the man page, “format” and “aspect” between them >> are used to calculate the correct aspect ratio when rendering the text. > > Yes, but a menu doesn't need rendering ... Text needs rendering. > In details, 4:3 menus show optimal mapping and they appear perfect > in a 4:3 pal tv. On the other hand, 16:9 menus appear ugly, since > the mpeg clip is stretched (when showed in a 4:3 tv two black borders > are added) but the png image is not, resulting in labels placed far > from expected. Please note, the png image is stretched right in > horizontal direction, it is just un-stretched in vertical direction. > In other words, while the clip is stretched as a 16:9, the above png > image is handled as a 4:3. > Perhaps is some setting missing? Remember that widescreen footage can be shown on a 4:3 screen in 2 different ways: letterboxed, or pan-and-scan. In both cases, the subpicture stream is scaled to fill the screen, not to match the picture bounds. Basically, you need to provide up to 3 different versions of the subpicture stream in this case: a “widescreen” one for use on widescreen TVs, and one or both of a “letterbox” or “pan-and-scan” versions for use on 4:3 TVs. ------------------------------------------------------------------------------ The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://p.sf.net/sfu/dev2dev-palm _______________________________________________ Dvdauthor-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/dvdauthor-users