[FFmpeg-user] FieldOrder detection with an timestamp list (time position of field order changes)

[Christoph Gerstbauer]

Hello

ffmpeg has a very good field detection algorythm:

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

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 extract an timestamp list where you can see on which 
timeposition in the file the field order is changing?

Like this:
00:00:00.000 - 00:00:23.040  TFF
00:00:23.080 - 00:01:00.000  BFF
00:01:00.040 - 00:02:00.000  Progressive

Sometimes material is made where field orders are switching, so it would 
be very helpful to find the exact time position where the field order 
changes.

br
Christoph Gerstbauer