[MEncoder-users] hqdn3d versus lavc's nr

[Guillaume POIRIER]

Hi,

On 11/3/05, Jean Hoderd <jhoderd at yahoo.com> wrote:
> Hi,
>
> There seem to be two ways of applying a denoise filter
> if one is using lavc: one in the video filter chain,
> with hqdn3d; the other with the nr option in lavcopts.
>
> Now, how do these compare exactly, and which one is
> recommended for a high quality encoding?  (And with
> which settings?)

The HTML doc gives an example of settings for hqdn3d Please refer to that doc.

As far as I'm concerned, I think the default values of hqdn3d are a
bit too high. If I remember correctly, the "temporal" value is 6 when
I prefer 4. I also decreased the chroma and luma values a bit.

I have not used nr other than on small tests as I don't use lavc
anymore and only use x264. I did not like the picture quality obtained
with nr, but that's just me. To my mind, nr's main advantage is to be
quite fast. That's all.

> I didn't even know about nr until I saw it in this list.
> The manual only mentions hqdn3d -- any reason?

Nope, the manual (at least, the one on the CVS version) does mention it.

Guillaume
--
Reading doesn't hurt, really!
  -- Dominik 'Rathann' Mierzejewski