[FFmpeg-user] Zoom out/scale down dynamically

[astian]

Gyan:
> On Mon, Sep 10, 2018 at 9:34 AM astian <astian at e-nautia.com> wrote:
> 
>>
>> I want to dynamically (per frame) zoom out/scale down a video below 100%
>> size.
>> It seems that the zoompan filter would be ideal for this case, but
>> unfortunately it clamps the zoom ratio to [1,10], that is, it only zooms
>> in/scales up.  Why?  And what can I use instead?
>>
> 
> What's the intended use of the image after dynamic scaling?

In this particular case, blend/concat to another video stream.

Cheers.