[FFmpeg-user] Detect interlaced video
oliver at fromme.com
Tue May 13 22:20:34 CEST 2014
Carl Eugen Hoyos wrote:
> 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.
Ok, thanks for the explanation. So I will just use the
idet filter to determine whether deinterlacing is required.
By the way, does it hurt to use the yadif filter on frames
that are not interlaced?
I came across an old DVD once that contained titles that
consisted of some scenes that were interlaced and some that
were not. I ran yadif over the complete titles, and I
think it didn't hurt the non-interlaced scenes, but I'm
not 100% certain. If it _does_ hurt, what is the best way
to handle such mixed material?
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