[mythtv] ffmpeg SWSCALE!

Steven Adeff adeffs.mythtv at gmail.com
Thu Aug 31 01:33:00 UTC 2006

On 8/30/06, Daniel Kristjansson <danielk at cuymedia.net> wrote:
> On Thu, 2006-08-31 at 10:53 +1000, Richard Dale wrote:
> > Here's a few screenshots of software scaling (using FFDshow on windows PCs,
> > not on Linux) and the before and after shots on DVDs:
> > http://www.htpcnews.com/index.php?option=com_content&task=view&id=132&Itemid
> > =48&limitstart=4
> >
> > I'm experimenting with MythVideo's mplayer parameters right now.
> >
> > By adding:
> > -sws 9 -vf pp=unsharp=l:c:7x7:5/denoise3d=12:12:12
> >
> > To mplayer's parameters this apparently this does software scaling, unsharp
> > mark sharpening and denoise too.
> Heh, I looked at the URL and I was gonna post a "pshaw, those
> images just look like somebody ran an unsharp filter on the image"
> type missive. But then I see that is exactly what you are doing
> with this command line. "unsharp" to reduce the resolution but
> enhance the edges, then "denoise3d" to blur out the noise. Yuk!
> Anyway, I wouldn't object to a good unsharp filter patch, even
> if I will personally never use it. The denoise3d filter has
> already been ported to mythtv. I would be interested in what
> kind of scaling the software scaler employs. If it's reasonable,
> I might implement the same filter in the hardware scaler. So
> they both look the same. This type of HW scaling would only be
> available on cards that supported the OpenGL 2.0 shading
> language, or the nVidia variant.

However its done, those of us with HDTV would appreciate any increase
in quality (especially if its tuneable)!

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