can video be "flagged" as 16 x 9 without re-encodi

[maca]

Sorry if this topic is covered somewhere else, but I can't seem to find it. I have an mpg file whose shape is 16x9 anamorphic, meaning it looks perfect on a 16x9 tv, but is "tall and skinny" on a 4x3. Obviously, the video is not "flagged" as 16 x9, so a dvd player on 4x3 mode doesn't know to make it letterboxed. My question, is there a fast way to flag the video as anamorphic without re-encoding the whole thing? Seems a waste of time (and a loss of quality) to re-encode, when all I want to do is make the dvd player aware that it's 16x9. Anyone know a way? Thanks.

[skeg64]

This is specified at the authoring stage. Although there is also a flag in the MPG header that describes the AR. It really depends on what you authored the disc with.
You can change the attributes in an authored DVD using PGCedit (right-click on the main title, choose "domain stream attributes").
However, if your MPG flag is wrong, use Restream to change it.

[ChrissyBoy]

As skeg64 said. If it is the AR in the IFO files that needs changing from 4:3 to 16:9 then ifoar2ws will do this too.

[maca]

Thanks for the responses. I haven't authored the disc yet; it's simply an mpg at this point, which my dvd authoring programs are reading as 4x3 when it really should be 16x9. I'll check out the above mentioned programs to see if I can work it out. Thanks again.

[maca]

RESTREAM seems to be the answer I've been looking for. Didn't know it existed; it'll make life a lot easier. Thanks to both of you for your help.