[mythtv-users] mythtvideo 0.21 - internal player scaling

[Steven Adeff]

On Wed, Mar 26, 2008 at 4:39 AM, Joan Vallés <joan.valles at gmail.com> wrote:
> On Tue, Mar 25, 2008 at 9:53 PM, Steven Adeff <adeffs.mythtv at gmail.com> wrote:
> >
> >
> >
> > On Tue, Mar 25, 2008 at 8:26 AM, Joan Vallés <joan.valles at gmail.com> wrote:
> > > On Wed, Mar 19, 2008 at 6:58 PM, Steven Adeff <adeffs.mythtv at gmail.com> wrote:
> > > > On Mon, Mar 17, 2008 at 10:39 AM, Joan Vallés <joan.valles at gmail.com> wrote:
> > > > > Hi,
> > > > >
> > > > > I've been using internal player for some time and I was happy with it as
> > > it
> > > > > plays many of the formats I use, since I upgraded to .21 I started
> > > noticing
> > > > > that videos do not look as smooth as before, I don't know how to
> explain
> > > it
> > > > > in my poor English, but image quality is definitely worse. I looks
> like
> > > the
> > > > > horizontal lines are doubled, scaled without interpolation
> ("coarse"?),
> > > > > does it make any sense? anyone experiencing something similar?
> > > > >
> > > > > BTW I tried the same videos using mplayer (SMplayer) and they look
> great
> > > (as
> > > > > they did when using .20)
> > > > >
> > > > > Thanks
> > > >
> > > > Possibly due to the use of a different deinterlacer than you had
> > > > previously set which is due to the new CPU Profiles. Make sure your
> > > > using the proper Profile for your system and that the deinterlacer is
> > > > properly set.
> > > >
> > > >
> > >
> > > Thanks for your reply Steve but videos I play using mythvideo are not
> > > interlaced, anyway, I'm going to check again my Playback profiles
> starting
> > > with the Slim one.
> >
> > Joan, it's possible, if the video your watching is much lower
> > resolution than your TV that the scaling Myth uses (which is very
> > basic) may be showing its inferiority to the mplayer scaler. Thats one
> > area where some work was done a while back (to introduce the use of
> > better scaling algorithms but nothing seems to have come of it. I
> > think the idea was to get it working in hardware via the openGL stuff,
> > but I don't think it was implemented yet.
> >
> > Daniel, any word on the scaling stuff that was discussed oh-so-many months
> ago?
> >
>
> Steve, you are right, videos are about the half of the resolution of the TV.
> I just noticed the  big quality difference when I switched to 0.21, before
> that (0.20) I was very happy with the output.

Is there a noticeable difference between 0.20 and 0.21's output of the
file? From what I understand there should not be any.


> Regarding openGL, should it provide more quality? I've tried to use it but
> it works just once, then when go back to the recording list and play the
> video again I just get a black screen... I need to do some more testing.

I don't think any improved scaling was included with the current
openGL output, just the frame work for it to be added in later.  If
your having problems with it, I would create a new thread for that as
it's most likely a driver/setup issue, but if not something that a
ticket should be opened for and whatever the bug is, fixed.

-- 
Steve
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