Optical flow using Hybrid -- Possible?

[Selur]

A source clip can have flags regarding whether they are interlaced or not, but like the normal interlaced info it often is not reliable.
If you call

ffprobe -i "<path to input>" -show_frames

you get data like:

[FRAME] media_type=video stream_index=0 key_frame=0 pts=149673 pts_time=1.663033 pkt_dts=151473 pkt_dts_time=1.683033 best_effort_timestamp=149673 best_effort_timestamp_time=1.663033 pkt_duration=1800 pkt_duration_time=0.020000 pkt_pos=532604 pkt_size=87443 width=1920 height=1080 pix_fmt=yuv420p sample_aspect_ratio=1:1 pict_type=P coded_picture_number=5 display_picture_number=0 interlaced_frame=1 top_field_first=1 repeat_pict=0 color_range=tv color_space=bt709 color_primaries=bt709 color_transfer=bt709 chroma_location=left [/FRAME]

Some deinterlacers use these,...
Problem is that just because a frame is interlaced, doesn't mean it shows combing. Sometimes progressive input is encoded with an interlaced flag or telecined contend it flagged as progressive or vise versa.

Cu Selur