[mythtv-users] How to improve capture quality

[Jay Mallar]

Steve Peters - Priority Electronics wrote:
> What is your recording bitrate set at?
>
>     -----Original Message-----
>     *From:* mythtv-users-bounces at mythtv.org
>     [mailto:mythtv-users-bounces at mythtv.org] *On Behalf Of *Jay Mallar
>     *Sent:* Monday, October 22, 2007 9:46 AM
>     *To:* Discussion about mythtv
>     *Subject:* [mythtv-users] How to improve capture quality
>
>     My machine:
>
>     Intel Quad Core (Q6600)
>     Asus P5N32-Plus MB
>     EVGA GeForce 6200-LE
>     Hauppauge PVR-250
>
>     My video card is connected to my monitor via the VGA port and to
>     my TV.   The TV connection is S-video out to an RF Modulator to my
>     TV's cable input.
>
>     The quality of video captured via the PVR-250 isn't what I'd hoped
>     for.  I thought at first that the video card or the connection to
>     my TV had been the problem, but that isn't the case.  I've watched
>     DVDs and AVIs on the machine via the same video connection to my
>     TV and the images are sharp and clean.
>
>     However when I capture video and replay it, it is grainy at best. 
>     When the image changes rapidly, I get what I can only hope to
>     describe as problems with refresh timing; I see this big
>     horizontal lines where it looks like the image was painted to a
>     certain point and then repainted again before it finished.  It's
>     worse with high-contrast, fast action.
>
>     I suspect I need to tweak the capture settings, but I'm curious
>     what the best values are.  I tried using the settings from the
>     Wiki (http://www.mythtv.org/wiki/index.php/Recording_Parameters),
>     but those don't seem to be getting me where I'd hoped to be. 
>
>     At the very least, shouldn't I be able to get the quality I see
>     when I hook my TV directly to the satellite STB or to the output
>     from my TiVo  (Are these TiVo values accurate? 
>     http://alfter.us/tivo2svcd.shtml?)
>
>     Setting the resolution to anything higher than width of 480 seems
>     to have no effect.    Myth won't let me change height above 480. 
>     I got a bit lost the settings for bitrate etc..    Not sure if
>     bitrate is avg or min or both, and not sure if Myth uses VBR or
>     CBR.  From what I've read avg bitrate should be set below max
>     bitrate, but I'm not getting good results trying to tweak on my own.
>
>
>
>
>
>
>
> ------------------------------------------------------------------------
>
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>   
Right now It's set to 480x480, MPEG-2 PS, 4:3, BR 5800, MBR 8000, but 
I've also used the defaults of 480x480, MPEG-2 PS, 4:3, BR 4500, MBR 
6000 as well and honestly can't tell the difference between them.

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