[mythtv-users] Re: pvr-150 image looks "soft"
paulx at andreassen.com.au
Fri Dec 9 00:27:45 EST 2005
On Fri, 9 Dec 2005 01:31 am, Steve Adeff wrote:
> On Thursday 08 December 2005 10:03, Steve Adeff wrote:
> > On Thursday 08 December 2005 01:26, Paul Andreassen wrote:
> > > On Thu, 8 Dec 2005 11:58 am, Mike Frisch wrote:
> > > > On 7-Dec-05, at 7:13 PM, Steve Hodge wrote:
> > > > > On 12/8/05, Steve Adeff <adeffs at gmail.com> wrote:
> > > > >> like a smoothing filter is being used. it looks just a tad softer
> > > > >> than the
> > > > >> source. I also notice that during scenes with movement it looks as
> > > > >> though the
> > > > >> frame rate was dropping by 5-10.
> > > > >>
> > > > >> so are there any "secret" settings I can look for or anything?
> > > > >
> > > > > A friend of mine had some success using the nvidia-settings
> > > > > sharpness adjustment. So if you've got a nVidia card that might be
> > > > > worth a try.
> > > >
> > > > What if I'm using an ATI card? :)
> > > >
> > > > I also mentioned the softness of the picture with the PVR-250. I
> > > > turned off the DNR which seems to have made a noticeable improvement
> > > > in picture quality but did nothing for the sharpness. There are some
> > > > MPEG-2 tuning parameters left but I am unsure what they do.
> > > >
> > > > Mike.
> > >
> > > Have you tried increasing the bitrate? Go nuts and see if it makes a
> > > difference. I use 6400/8000 which is much better than the analog
> > > signal out of a digital satellite set top box.
> > >
> > > Use 720x576 and Stream Type: 'DVD-Special 2' in case you ever what to
> > > put it on a dvd.
> > >
> > > On every boot do a 'ivtvctl -c dnr_temporal=0' to turn off temporal
> > > filtering.
> > >
> > > One other thing I did was turn up the contrast and colour by 5%. While
> > > using Live TV on the PVR-x50, press 'g' for the recording controls.
> > >
> > > Paul
> > well, I've got my bitrate at 6000000/8000000 already. I'm using stream
> > type DVD-Special 2 already. I used the temporal setting from the previous
> > person that posted it.
> > BUT your comment about contrast and colour got me thinking. so I searched
> > google and found:
> > http://ivtvdriver.org/index.php/Ivtvctl
> > which is nice for us to have.
> > then I noticed the brightness was all the way up. well, every stereophile
> > knows the first thing you do when you go tv shopping at a store is go
> > into the menu and turn the brightness and contrast down on the display
> > TV's. Stores always turn them all the way up to make the TV look
> > brighter, and in the eyes of those that don't know, "better". What it
> > actually does is destroy the image quality. the picture will get blury
> > amongst other things. so changing the brightness down to 63 seems to have
> > fixed the softness problem I had. Its not perfect, but now I can play
> > with it.
> > I do like being able to see the image all of a sudden shift brightness
> > when I do this though, kinda cool.
> > anyway. I'm gunna play around with the settings ivtvctl allows to change.
> > I'll post my results for others to compare/argue with.
> ok, everytime I change the channel the brightness/contrast settings reset.
> how do I store the settings in MythTV so they don't change?
These setting are stored in the database for each channel. You have to set
them individually with 'g' or update the database. Mythweb has a page with
channel configuration which you could use .
More information about the mythtv-users