[FFmpeg-devel] [PATCH] Port mp=eq/eq2 to lavfi

Stefano Sabatini stefasab at gmail.com
Tue Jan 27 10:56:54 CET 2015

On date Monday 2015-01-26 13:20:49 +0100, Michael Niedermayer encoded:
> On Mon, Jan 26, 2015 at 11:31:49AM +0100, Christophe Gisquet wrote:
> > To me, it looks like just a normal
> > clipping is needed.
> yes
> also on a differnt topic, i think "gamma*" should be removed from
> eq, the implementation is simply wrong and it cannot be done
> conveniently in a yuv based filter.
> we already have lut based filters for rgb space, they could easily
> do correct gamma, a "gamma" filter could be added based on that

BTW, eq is not bitexact with mp=eq2 and differs in many parts of the
code (yes, I realized this after removing mp=eq/eq2, so this is partly
my fault). For example the LUT16 part of the code is entirely missing.

Do we care about it? I don't, so I suggest to just keep the code and
try to improve on it rather than port the missing "features" (was a
16bit LUT useful in that context?).

For the future, please *ALWAYS*, *ALWAYS*, *ALWAYS*, test for
bitexactness when implementing or committing a new filter port, or
state in the log why it differs.
FFmpeg = Faithless and Faithless Meaningless Philosofic Epic Genius

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