[FFmpeg-user] lenscorrection and vignette filters
barsnick at gmx.net
Tue Feb 23 10:31:20 CET 2016
On Tue, Feb 23, 2016 at 10:00:47 +0100, Michael Koch wrote:
> The remarks "0.5 means no correction" in the documentation are wrong.
> This can easily be tested:
I know nothing about lens correction formulas, I trust you on this. :-)
> But unfortunately this isn't the only error in the documentation. I
> haven't yet found out which formula is actually used in the
> lenscorrection filter, but one thing is absolutely sure: It's not the
> formula from the documentation.
I can't help you much, but you are free to look at the source code, and
see whether you can see the formula from it:
I think filter_frame() calls filter_slice(), but don't quote me on
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