MIME-Version: 1.0
In-Reply-To: <list-5255529@media-motion.tv>
References: <list-5255529@media-motion.tv>
Date: Fri, 18 Oct 2013 08:55:42 +0200
Message-ID: <CAAQHdpDNKt-=3cj+mOK=5mDsAV82TBvXaHqeDtwn5DAmObwH3g@mail.gmail.com>
Subject: Re: [AE] Camera flicker
From: Py Fave <pyfave@gmail.com>
To: After Effects Mail List <AE-List@media-motion.tv>
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

you have options with expressions too :

i found that , that can be adapted

Re: driving opacity based on another layer's pixel value?
by Dan Ebberts on Oct 4, 2008 at 5:57:07 am
Something like this should do it:

sampleSize =3D [10,10];
target =3D thisComp.layer("layer 1");
samplePos =3D [target.width,target.height]/2;
rgb =3D target.sampleImage(samplePos, sampleSize, true, time);
hsl =3D rgbToHsl(rgb);
hsl[2]*100

Dan

2013/10/17 Simon Bj=F6rk <bjork.simon@gmail.com>:
> If you can stabilize your shot around an area that has flicker, this meth=
od
> works very well.
>
> - Create a composition called "average luma". You could make it in a lowe=
r
> resolution to save render time. Drop in your plate and duplicate it. On t=
he
> bottom layer, freeze frame at a frame where you have no flicker (or as
> little as possible). Apply a blur to both layers and crank up blurriness =
a
> lot. Set the blending mode of the top layer to "Divide".
> - Create a composition called "flicker removal". Drop in your plate at th=
e
> bottom and the average luma composition on top, scale it to composition
> size, and set the blending mode to "Multiply".
> - Flicker removed.
>
> So if you need to stabilize around an area, you would probably want to cr=
op
> the plate around that area and use that to average the luminance. It
> important that you linearize your footage and that you work in 32bpc.
>
> Cheers,
> Simon
>
>
> 2013/10/17 Simon Bj=F6rk <bjork.simon@gmail.com>
>>
>> If you can stabilize your shot around an area that has flicker, this
>> method works very well.
>>
>> - Create a composition called "average luma". You could make it in a low=
er
>> resolution to save render time. Drop in your plate and duplicate it. On =
the
>> bottom layer, freeze frame at a frame where you have no flicker (or as
>> little as possible). Apply a blur to both layers and crank up blurriness=
 a
>> lot. Set the blending mode of the top layer to "Divide".
>> - Create a composition called "flicker removal". Drop in your plate at t=
he
>> bottom and the average luma composition on top, scale it to composition
>> size, and set the blending mode to "Multiply".
>> - Flicker removed.
>>
>> So if you need to stabilize around an area, you would probably want to
>> crop the plate around that area and use that to average the luminance. I=
t
>> important that you linearize your footage and that you work in 32bpc.
>>
>> See attached example.
>>
>> Cheers,
>> Simon
>>
>>
>> 2013/10/16 Stephen van Vuuren <stephen@sv2studios.com>
>>>
>>> I have this plugin:
>>>
>>> http://www.granitebaysoftware.com/products/productgbd.aspx
>>>
>>> It's decent but not what I would call state of the art.
>>>
>>> stephen van vuuren
>>> 336.202.4777
>>>
>>> http://www.insaturnsrings.com/
>>> http://www.sv2dcp.com/
>>> http://www.sv2studios.com/
>>>
>>> A film is - or should be - more like music than like fiction. It should
>>> be a
>>> progression of moods and feelings. The theme, what's behind the emotion=
,
>>> the
>>> meaning, all that comes later.
>>> -Stanley Kubrick
>>>
>>> -----Original Message-----
>>> From: After Effects Mail List [mailto:AE-List@media-motion.tv] On Behal=
f
>>> Of
>>> Perry Mitchell
>>> Sent: Wednesday, October 16, 2013 4:42 AM
>>> To: After Effects Mail List
>>> Subject: [AE] Camera flicker
>>>
>>> High speed video shooting has now become pretty mundane. Sony has just
>>> released an update to its F5/55 camera that offers 240fps. As a result =
of
>>> seeing some quick & dirty tests I am triggered to ask what is the best
>>> flicker reduction AE plug that members have encountered? As a minimum i=
t
>>> has
>>> to offer the ability to track both moving scenes and differing flicker
>>> areas
>>> within the shot.
>>>
>>> --
>>> Perry Mitchell
>>> Engineer
>>> Farnham, Surrey
>>>
>>>
>>> +---End of message---+
>>> To unsubscribe send any message to <ae-list-off@media-motion.tv>
>>>
>>>
>>> +---End of message---+
>>> To unsubscribe send any message to <ae-list-off@media-motion.tv>
>>
>>
>