[FFmpeg-user] De-telecine, deinterlace, and filter chains

[Andy Furniss]

Andy Furniss wrote:

> Vid looks like it's scaled up from 480 height and pillarboxed, so
> the weave is not line for line anymore.
>
> It's probably been scaled as progressive which on strong chroma will
> (I think) be un-mendable. Saying that the sample can be scaled down
> to 480 and the weave is 1:1 again, which holds out the possibility
> that you could make it interlaced again with tinterlace and try to
> get IVTC to run on that.

Maybe tinterlace was a crap idea as IIRC it would need field rate input.
Another way could be to scale down to 480 do a field rate deint and drop
duplicated frames.