You want to come out 720 x 486 for NTSC (720 x 576 for PAL).
Field dominance is Lower field first for NTSC and Upper field for PAL.
When rendering from AE to the 844/X codec check the options so that you're taking out the correct format, 8-bit or 10-bit and Video or Matte. Also add "-V" to the end of a video output, and "-M" if outputting a matte file (without the "").
That's all I can think of off the top of my head.
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