MBAFF involved in x1088 (1920x1080 video) ?

[twinsun]

Here is another common 1920x1080 viewed 1088 with AVDM.
Alpes extrait 141213 1080 (AVDM 1088).mp4
https://drive.google.com/file/d/0B7UOzqUbGLumdmo2S2haNFVOVzA/view?usp=sharing
5MB, download with arrow on top of screen.

It seems 1088 appends when the video has full vertical stack of MBAFF macroblocks *.
As each macroblock is 16x16, a full stack is 1088.

1- Such a video, just copy edit, will keep the original 1920x1080 in all kind of players, and also will still be opened 1088 with AVDM.
No issue here.

2- But reencoding the video, if someone don't crop at least the 8 bottom lines, will give a 1920x1088 in all players, with the 8 bottom lines hard coded.
An issue here, but not if one crops the bottom.

* If a video as only scattered MBAFF macroblocs in frames, with not any including line 1080, the MBAFF video is AVDM opened regular 1080, afai see.