[mythtv-users] Motion is jerky/blurry with tv out.

[Damon Searle]

> -----Original Message-----
> From: mythtv-users-bounces at mythtv.org [mailto:mythtv-users-
> bounces at mythtv.org] On Behalf Of Michael T. Dean
> Sent: Tuesday, 31 May 2005 11:43 PM
> To: Discussion about mythtv
> Subject: Re: [mythtv-users] Motion is jerky/blurry with tv out.
> 
> Matthew Carle wrote:
> 
> > I have got MythTV running on Fedora 3 but any motion appears
> > jerky/blurry. This is most obvious on scrolling credits.
> >
> > I live in Australia and we use PAL.
> >
> >
> > It is currently running at 800x600 @ 60hz (which I suspect is the
> > problem since it should be 50hz?). I can't seem to get 50hz.
> >
> > The video card is a GeForce FX5600 and I am using svideo out to a sony
> > WEGA TV.
> >
> > Any ideas? Should it be running at a different resolution (720x576 or
> > something)? It has me stumped.
> >
> Does *anybody* read the README for NVIDIA's drivers?
> 
> ftp://download.nvidia.com/XFree86/Linux-x86/1.0-7174/README.txt
> 
> specifically, (app-j) APPENDIX J: CONFIGURING TV-OUT
> 
> To use your TV with X, there are a few parameters that you should
> pay special attention to in your X config file:
> 
>   o The VertRefresh and HorizSync values in your monitor section;
>     please make sure these are appropriate for your television. ...
> 
>   o The Modes in your screen section; the valid modes for your TV encoder
>     will be reported in a verbose X log file (generated with `startx --
>     -logverbose 5`) when X is run on a TV.  Some modes may be limited
>     to certain TV Standards; if that is the case, it will be noted in
>     the X log file.  Generally, atleast 800x600 and 640x480 are supported.
> 
>   o The "TVStandard" option should be added to your screen section; valid
>     values are:
> 
>         "PAL-B"  : used in Belgium, Denmark, Finland, Germany, Guinea,
>                    Hong Kong, India, Indonesia, Italy, Malaysia, The
>                    Netherlands, Norway, Portugal, Singapore, Spain,
>                    Sweden, and Switzerland
>         "PAL-D"  : used in China and North Korea
>         "PAL-G"  : used in Denmark, Finland, Germany, Italy, Malaysia,
>                    The Netherlands, Norway, Portugal, Spain, Sweden,
>                    and Switzerland
>         "PAL-H"  : used in Belgium
>         "PAL-I"  : used in Hong Kong and The United Kingdom
>         "PAL-K1" : used in Guinea
>         "PAL-M"  : used in Brazil
>         "PAL-N"  : used in France, Paraguay, and Uruguay
>         "PAL-NC" : used in Argentina
>         "NTSC-J" : used in Japan
>         "NTSC-M" : used in Canada, Chile, Colombia, Costa Rica, Ecuador,
>                    Haiti, Honduras, Mexico, Panama, Puerto Rico, South
>                    Korea, Taiwan, United States of America, and Venezuela
>         "HD480i" : 480 line interlaced
>         "HD480p" : 480 line progressive
>         "HD720p" : 720 line progressive
>         "HD1080i": 1080 line interlaced
>         "HD1080p": 1080 line progressive
>         "HD576i" : 576 line interlace
>         "HD576p" : 576 line progressive
> 
>     The line in your X config file should be something like:
> 
>         Option "TVStandard" "NTSC-M"
> 
>     If you do not specify a TVStandard, or you specify an invalid value,
>     the default "NTSC-M" will be used.  Note: if your country is not in
>     the above list, select the country closest to your location.
> 
> To repeat:  *If you do not specify a TVStandard, or you specify an
> invalid value, the default "NTSC-M" will be used.*
> 
> So, output a PAL signal and you should be fine.  Deinterlacing "works"
> when outputting an NTSC signal only as a side effect.  You'll likely get
> much better quality outputting the appropriate PAL (50Hz) signal without
> deinterlacing than using deinterlaced NTSC timings since your display is
> PAL and interlaced.
> 
> Note, as described in bullet 2, you may have to adjust your modeline.
> Just do a search on Google for "PAL-<whatever>" and "modeline" and test
> a few of them out.
> 
> Mike
> 
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Hasn't this been discussed over and over and decided that there's no way to
get smooth output on NVIDIA cards without using BOB deinterlacing?

Damon