Adding black bars without re-encoding?

[Wheatyz0r]

I've got a 640x272 25fps Divx movie, and I want to add black bars to it (so the final res would be 640x480). However, I don't see how I can do this without re-encoding (and therefore losing more quality, as Divx is not lossless).

For anyone who's curious, I want to do this so that I can watch the Divx file through my H+ using HHPlus. Playing the file the way it is now (ie. with no black bars) works, but the video is slightly shifted to the right on the TV (leaving about a 1cm black gap between the left of the TV and the picture).

Anyway, any help is appreciated, thanks.

[Wheatyz0r]

sorry, but I gotta bump this.

[Big_Jit]

you won't be able to add black bars withour re-encoding. That's pretty much the bottom line...