Is there such a thing as a "Field-Based" Divx file

[LisaB]

Just wondering, is the video information in a Divx file always physically stored and encoded on a frame by frame basis (whether the frames are progressive or interlaced doesn't matter, I guess)....or can Divx be field-based.

I'm really trying to understand this. It seems that there is no direct connection between the type of frames (progressive or interlaced) and the "physical" storage of the information in the video file (field-based or frame-based). After all, one can always split progressive frames and store them as fields, and one can always merge interlaced fields and store them as frames. Doing the former would be fine, I think, but doing the latter would lead to an inefficient encode, right?

[Gazorgan]

DivX doesn't support Interlacing, it's all progressive.

24 fps (FILM from DVD) is as efficient as it gets.

[LisaB]

So, if it's all progressive, why does TMPGEnc waste so much time "judging field order" when I open my DivX Avi in using the wizard?