On Sat, 29 Aug 2015, Carl Eugen Hoyos wrote:
Marton Balint <cus <at> passwd.hu> writes:
Consider you have a 25i source, and you want 30i (60p for display)
Are you referring to this filter chain for deinterleaving?
-vf il=l=d:c=d,framerate=30,il=l=i:c=i,yadif=1
And this for deinterlacing?
-vf yadif=1,framerate=60,interlace,yadif=1
The original task afaiu was not to provide a progressive
output stream (in that case, deinterlacing first is of
course correct) but to provide an interlaced stream.
(I don't care about the reason.)
The last filter (yadif=1) is only there to visually check the results, as
I have a progressive display. If you are encoding to a 30i file, you can
remove the yadif=1 filter form the filter chain.
I thought - and it seems that Robert agrees now - that
apart from being faster, deinterleaving has a good
chance of providing better quality.
The second is much, much better.
Why do you think so?
I have tried it, and seen it with ffplay.
(Apart from the fact that I don't understand the
filterchain "interlace,yadif": It never makes sense imo.)
It's there to be able to visually see the result. Remove the yadif filter
from the end of the filter chain if you are encoding a file.
Regards,
Marton
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