[MEncoder-users] question when encoding lossless progressive 60 fps to 30fps flash video

[Reimar Doeffinger]

Hello,
On Wed, Apr 25, 2007 at 11:06:39PM -0500, Alejandro Vélez wrote:
[...]
> this video maintain motion smoothness even it was reencoded to a less
> framerate than the original. It looks like blur motion to me, I'm not
> sure. I saw another where they used the half of framerate and the
> reencoded video maintains a motion smoothnes closer to the original
> but it looked different.

It can't really maintain smooth motion, you can at best blur over it,
and I'm certain quite a few people will hate you for blurring things (at
least I tend to strongly notice bluring but usually don't care about low
fps - as long as it is constant).
Anyway, have a look at temporal denoising, e.g. -vf hqdn3d, that should
provide for some kind of motion blur effect. And check if the result is
better if you have softskip before or after it.

Greetings,
Reimar Doeffinger