Does anyone know what the difference between 'encoded bounds' and 'display bounds' is (as shown in Apple Compressor 3.0)? I am compressing a 720x486 quicktime, exported by Final Cut Pro 6, as an mpeg2. When I open the resulting file in quicktime and get the movie properties, it list the file as 640x480, even though I encoded it as 720x480. When I import the file into After Effects, it verifies that it is indeed 720x480. When I import it back into Compressor and look at the properties, it says the 'encoded bounds' are 720x480, but the 'display bounds' are 640x480. In fact, when I look at the original quicktime before I compress it, it shows the 'encoded bounds' are 720x486 but the 'display bounds' are 640x486.
My question is, WTF? Does this have to do with pixel aspect, or is there something else I am missing?