[XviD-devel] GMC

[suxen_drol]

On Tue, 31 Dec 2002 00:00:40 +0100 (CET) Christoph Lampert <chl@math.uni-bonn.de> wrote:

> I don't like 1 warp point because there's no real difference to normal
> motion vectors, and you can gain hardly anything from GMC if it just
> implements stuff already implemented just in a different way.
> That's one reason why current GMC has no positive effect. The other one
> is, that's the implementation is bad, of course... 
> 
> But with 2 warp points you can encode zooms and rotation, that might save
> a few bits (e.g. during zooms and camera rotations ;-)

yep.

> 3 warp points might not be necessary, because the extra features
> (coding shears) are rarely used in real life video. 
> 
> ffmpeg can decode up to 3 warp points, so I can test encoding even without
> XVID support for decoding... but I wanted to make sure what the status is. 

have you modified the encoder motion compensation for 2 warp points?
if so, then modifying the decoder shall be a since.

-- pete; life is like a box of ammo