[FFmpeg-user] Zoom out/scale down dynamically

astian astian at e-nautia.com
Fri Sep 14 06:58:00 EEST 2018

Carl Eugen Hoyos:
> 2018-09-13 3:28 GMT+02:00, astian <astian at e-nautia.com>:
>> Carl Eugen Hoyos:> 2018-09-10 6:04 GMT+02:00, astian <astian at e-nautia.com>:
>>>> I want to dynamically (per frame) zoom out/scale down
>>>> a video below 100% size.
>>> Isn't it sufficient to pad first, and use zoompan in a later
>>> filter?
>> Do you mean work in reverse? Scale down, pad, zoompan
>> in reverse, then reverse the frames??
> No, only pad and zoompan.

Well, I'm not sure what you mean. Pad doesn't seem very dynamic to me, I
know that it has an eval=frame option, but according to the manual there
is no frame-number variable that I could exploit.

Do elaborate, please.


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