Andrew: using some "real" interlaced video here, I tested dv_pal.qt and dv_pal.avi (which will be checked into GIT on the next checkin). It works but the input video was from TV and was already Bottom Field First. In these opts file we had changed top=0 to field_order=bb since that, I believe, is correct with the View options available when switch from viewing "codec" to "ffmpeg". As you pointed out via the documentation, bottom field first is what dvvideo is supposed to generate and when I tried to switch to field_order=anything else (or top=1), it still generated bottom field first I actually read some documentation, it says DV (usual Standard Resolution,
at least) uses bottom field first:
https://www.provideocoalition.com/field_order/
https://forums.creativecow.net/docs/forums/post.php?forumid=8&postid=566441&...
so, I put top=0 options in my profiles, they still render.