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

[Andy Furniss]

Christoph Gerstbauer wrote:
> 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)

Not sure I would trust idet to call everything right, but then maybe the
fail case I vaguely remember was some artificial/genetated sample.