On Wed, 4 Jan 2017, Matthias, Thomas wrote:
Thanks for the help Carl.
Seeing the difference isn’t that important, really what I’m trying to
accomplish is outputting 1080i video using the FFMPEG wrapper for the
DeckLink SDK. I’ve tried numerous combinations of filter settings with
either 1080i or 1080p source content, but I think there I just a
limitation/bug in the DeckLink wrapper/device code that’s preventing me
from outputting interlaced video. Any clues on how to fix this would be
amazing!
Just a wild guess, but if I remember correctly, the decklink device
advertises both progressive and interlaced 1080 formats. You can check
this with -list_formats. If the progressive one is the first, then I think
the decklink device in ffmpeg will use that, no matter what you do. If
that is really the case, then this has to be fixed in ffmpeg/libavdevice.
Regards,
Marton
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