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Fine tune tvcard though Mythtv?

 

 

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hsingfoo at gmail

Feb 18, 2008, 10:51 PM

Post #1 of 5 (293 views)
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Fine tune tvcard though Mythtv?

Hi,

Is there any way to finetune the tvcard (picture quality) through
Mythtv? I have a PVR350 and by default, Hauppage ships this with
software that can 'finetune' the picture output quality.

Mythtv svn, PVR350, Analog Cable

Thanks,
-HF
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myth at dermanouelian

Feb 19, 2008, 6:48 AM

Post #2 of 5 (263 views)
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Re: Fine tune tvcard though Mythtv? [In reply to]

On Feb 18, 2008, at 10:51 PM, Hsing-Foo Wang wrote:

> Hi,
>
> Is there any way to finetune the tvcard (picture quality) through
> Mythtv? I have a PVR350 and by default, Hauppage ships this with
> software that can 'finetune' the picture output quality.
>
> Mythtv svn, PVR350, Analog Cable
>
> Thanks,
> -HF

ivtv has some tools to adjust the picture. I've never used Hauppauge's
software so I don't know how it compares, but you should start with
v4l2-ctl --help (in recent versions of ivtv).

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hsingfoo at gmail

Feb 19, 2008, 7:01 AM

Post #3 of 5 (265 views)
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Re: Fine tune tvcard though Mythtv? [In reply to]

Thanks Brad,

I'll play with that.

-HF


On Feb 19, 2008 3:48 PM, Brad DerManouelian <myth[at]dermanouelian.com> wrote:
>
> On Feb 18, 2008, at 10:51 PM, Hsing-Foo Wang wrote:
>
> > Hi,
> >
> > Is there any way to finetune the tvcard (picture quality) through
> > Mythtv? I have a PVR350 and by default, Hauppage ships this with
> > software that can 'finetune' the picture output quality.
> >
> > Mythtv svn, PVR350, Analog Cable
> >
> > Thanks,
> > -HF
>
> ivtv has some tools to adjust the picture. I've never used Hauppauge's
> software so I don't know how it compares, but you should start with
> v4l2-ctl --help (in recent versions of ivtv).
>
> _______________________________________________
> mythtv-users mailing list
> mythtv-users[at]mythtv.org
> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>
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mtdean at thirdcontact

Feb 19, 2008, 2:02 PM

Post #4 of 5 (255 views)
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Re: Fine tune tvcard though Mythtv? [In reply to]

On 02/19/2008 01:51 AM, Hsing-Foo Wang wrote:
> Is there any way to finetune the tvcard (picture quality) through
> Mythtv? I have a PVR350 and by default, Hauppage ships this with
> software that can 'finetune' the picture output quality.
>
> Mythtv svn, PVR350, Analog Cable

Are you really talking about "fine-tuning" the picture quality or are
you talking about fine-tuning the tuner (which will result in improving
picture quality in the event that you originally tuned to the wrong
frequency)? I.e. when you use the Hauppauge software to "finetune", is
it adjusting the frequency to which the tuner is tuned?

If so, just specify either a frequency ID as a frequency in kHz or
specify a "finetune" amount (for the appropriately-named "Finetune
(kHz)" setting) as a number of kHz (positive or negative) to be added to
the frequency specified for the given frequency ID (i.e. channel number)
in the frequency table you're using.

Note, though, that finetune should not be required in most cases.

Mike
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hsingfoo at gmail

Feb 19, 2008, 10:41 PM

Post #5 of 5 (246 views)
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Re: Fine tune tvcard though Mythtv? [In reply to]

Hi,

I am talking about the picture quality. But then again, I didn't grasp
the meaning of the db table finetune either, but that is due to the
lack of my knowledge of Khz and Frequencies. ;-)
I simply enter the exact frequency into the db table as they are
listed by my cable company. First that didn't give me a picture and I
found out that they are 250 off (+), so I manually added 250 to all
frequencies which gave me the correct channels. Did I had to use the
'finetune' db table for that? (searched the wiki, but couldn't find)

As for picture quality, it all looks a bit 'misty' (not perfectly
sharp) opposed to the pic quality on my tv screen. I saw that the
original Hauppage software can finetune the picture quality, and was
wondering if Mythtv had some sort of 'improve picture quality' stuff
on board.

Thanks,
-HF


As for frequency, I can enter the exact frequency

> Are you really talking about "fine-tuning" the picture quality or are
> you talking about fine-tuning the tuner (which will result in improving
> picture quality in the event that you originally tuned to the wrong
> frequency)? I.e. when you use the Hauppauge software to "finetune", is
> it adjusting the frequency to which the tuner is tuned?
>
> If so, just specify either a frequency ID as a frequency in kHz or
> specify a "finetune" amount (for the appropriately-named "Finetune
> (kHz)" setting) as a number of kHz (positive or negative) to be added to
> the frequency specified for the given frequency ID (i.e. channel number)
> in the frequency table you're using.
>
> Note, though, that finetune should not be required in most cases.
>
> Mike
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