[FFmpeg-user] field order detection - numbering framepositions possible?

[Christoph Gerstbauer]

As we know it is possible to detect field orders with ffmpeg:

ffmpeg -i <INPUT_FILE> -vf idet -f rawvideo -y NUL

Example Output:

[Parsed_idet_0 @ 003ea220] Single frame detection: TFF:0 BFF:153 
Progressive:0 Undetermined:0
[Parsed_idet_0 @ 003ea220] Multi frame detection: TFF:0 BFF:153 
Progressive:0 Undetermined:0


Is it possible to MARK the framenumbers to its detected field orders? 
Via framenumber or timestamp?
Or to search a "known" TFF content for BFF frames? To force the output 
to lines like:
Found BFF frames at position X

(https://ffmpeg.org/pipermail/ffmpeg-user/2014-October/023995.html)

Best Regards
Christoph