[FFmpeg-user] lumakey?

[Zenny]

On 11/2/15, Timo Rothenpieler <timo at rothenpieler.org> wrote:
>> On 10/14/15, Zenny <garbytrash at gmail.com> wrote:
>>> Hi,
>>>
>>> Is there a lumakey filter in ffmpeg 2.8 or latest git? Anything proposed?
>
> No

In that case, is there a way to achieve lumakey alternatively?

I am experimenting to extract the brightest portion (naturally the
white background) from the picture ( http://picpaste.com/qJ4WNPHY.jpg)
and replace that with a transparent layer, based on luminance value.

I read here at
https://ffmpeg.org/pipermail/ffmpeg-user/2011-July/001793.html that
geq filter can be of help to the yuv formats, but could not figure out
how? Any inputs appreciated!

>
>>> Cheers,
>>> /z
>>>
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