[FFmpeg-user] Why are half the frames "duplicate" ?

[Carl Eugen Hoyos]

2018-09-28 20:58 GMT+02:00, sean darcy <seandarcy2 at gmail.com>:

> Also, I used ffprobe:
>
> ffprobe -show_frames -select_streams v -i in.mpg  2>&1 | grep -c
> interlaced_frame=1
> 2052
> ffprobe -show_frames -select_streams v -i in.mpg  2>&1 | grep -c
> interlaced_frame=0
> 30347
>
> This means there are at least some interlaced frames

No, unfortunately ffprobe cannot tell you (the information above
is mostly unrelated to the question if the content is interlaced,
telecined or progressive).

Either use the idet filter or do a visual inspection.

Carl Eugen