Original sequence settings:
720 x 480 NTSC DV 3:2
pixel aspect ratio: NTSC CCIR 601 – Anamorphic
Compressor: DV/DVC PRO NTSC
Copied and pasted into letterboxed sequence:
Frame size, pixel aspect ratio, compressor – ALL
settings same as above except Anamorphic is unchecked.
Looks good, aspect ratio fine, black bars on top and bottom.
Final step:
Export as Quicktime Movie
I tried Current settings, apple pro res, uncompressed, both anamorphic and not anamorphic, as well as custom 720 x 480.
The resulting file is squeezed every single time.
iMac 2.8 GHz Intel Core i7, 8 GB
OS 10.6.2
Final Cut Pro 7.0