You didn't say what your editing platform is, but whatever it is you need to be working in a 1920x1080 project/timeline. Your 1440x1080 will be displayed properly in that window, unless you have the aspect ratio set at something funky. You'll do the rest of the work in 1920x1080.
Think of it this way... the footage you shoot is technically 1440x1080 (although it
appears 1920x1080 because the pixels end up getting stretched horizontally), but that's the
last time you should use that ratio. Everything is edited at 1920x1080. And your final master is made at 1920x1080. As is the mpeg file for delivery.
As for "will the commercial be able to be played in High definition on a local tv station's HD channel?"... you'll just have to ask them. Many stations accept HD commercials... but many do not, even though the station broadcasts in HD. Our company mostly produces broadcast commercials, and even though we produce everything in HD, we always make a standard-def NTSC (letterboxed) version as well, as that's what many television stations and cable systems still require.
T2
__________________________________
Todd Terry
Creative Director
Fantastic Plastic Entertainment, Inc.
fantasticplastic.com
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