[FFmpeg-soc] making moving and zooming effect

[Stefano Sabatini]

On date Wednesday 2009-11-04 17:21:04 +0200, Oleksandr Bondar encoded:
> Thanks for the response.

Avoid top-posting on FFmpeg mailing lists, we're trying to resist
against this (predominant) silly way to reply to text messages.
 
> When I got something working will put it here.
> 
> Have one more question.
> 
> Is it possible to use scale and overlay filters with dynamic values of h:w
> for scale and x:y for overlay?
> like it is possible in setpts filter,
> 'setpts=AVTB/25*(N+0.05*sin(N*2*PI/25))'

Do you mean as a function of PTS or N?

For the overlay filter that should be possible by extending it, with
the scale filter that's going to be more tricky since then you'll have
a variable output video size, which is currently not managed by
libavfilter.

[...]

Regards.