[FFmpeg-user] amplify filter, threshold option

[Michael Koch]

Am 22.02.2019 um 23:37 schrieb Paul B Mahol:
> On 2/17/19, Michael Koch <astroelectronic at t-online.de> wrote:
>> Am 17.02.2019 um 22:12 schrieb Paul B Mahol:
>>> On 2/17/19, Michael Koch <astroelectronic at t-online.de> wrote:
>>>> The threshold option in the "amplify" filter suppresses large
>>>> differences. In my opinion it would make more sense to have a (second)
>>>> threshold option for suppressing small differences, for example noise. I
>>>> mean alter the source pixel only if the difference is greater than the
>>>> threshold value.
>>> The sole point of filter is usage in forensics to amplify small pixel
>>> changes in
>>> static video. But it could be added to filter, sure it would not hurt
>>> to extend its funcionality.
>> Sounds good. I have videos of the night sky and want to amplify fast
>> moving objects, especially meteors. But I don't want to amplify the noise.
> Done.

Thank you! I'm just testing it.

Michael