[FFmpeg-user] Detect interlaced video

[Carl Eugen Hoyos]

Oliver Fromme <oliver <at> fromme.com> writes:

> Actually I had hoped that there is a flag somewhere 
> on the DVD, either in the meta data or in the MPEG2 
> stream itself, indicating whether a title is 
> interlaced or progressive.

The flag tells you if the stream was encoded using 
mpeg2video interlaced or mpeg2video progressive, but 
to decide whether or mot to deinterlace a video, only 
the actual content is relevant: Progressive content 
is often encoded as interlaced and it is of course 
possible (although unlikely) that interlaced content 
is encoded using progressive frames.

Carl Eugen