[mythtv-users] My MythTV experience

[Kirby Vandivort]

I haven't been following this super close, but how recent is your version
of ivtv?  The brightness, etc options didn't exist until a month or
two back..

On Mon, Aug 18, 2003 at 11:08:35AM -0400, Ken Bass wrote:
> None, I tried those previously but they did't work. 
> 
> [root at kevo utils]# ./test_ioctl -y brightness=128
> ioctl: VIDIOC_S_CTRL
> ioctl: VIDIOC_S_CTRL failed
> 
> Looking in dmesg - there is a cooresponding msg:
> ivtv: ivtv-api.c: unknown ioctl 0x4008561c
> 
> If I try to use the 'function' key in MythTV same result.
> 
> On Mon, 18 Aug 2003 09:56:28 -0500 (CDT), "James S. White"
> <james at jameswhite.org> wrote:
> 
> >> The colors on the TV are much darker, black objects blend into the background.
> >> Peoples faces are redish/orange. Very white background shows 'interlace'
> >> looking stripes. Video where flash bulbs go off is poor.
> >
> >Just out of curiosity, how much adjusting have you attempted with test_ioctl?
> >As in:
> ># brightness [0 - 255]
> >test_ioctl -y brightness=128
> ># hue [-128 - 127]
> >test_ioctl -y hue=-5
> ># saturation [0 - 127]
> >test_ioctl -y saturation=64
> ># contrast [0 - 127]
> >test_ioctl -y contrast=64
> >
> >
> >--------------------------------------------------------------
> >James S. White                      GAPS Incorporated
> >james at jameswhite.org                Electrical Engineer - Etc.
> >http://www.jameswhite.org           Caffeine is my anti-drug.
> >--------------------------------------------------------------
> >I can picture in my mind a world without war, a world without hate.
> >And I can picture us attacking that world, because they'd never expect it.
> >                                                               -Jack Handy
> >
> >On Mon, 18 Aug 2003, Ken Bass wrote:
> >
> >> I've put together a mythtv box with a small form factor PC (ASUS Pundit).
> >> 2.4GHz 533GSB P4, 512MB RAM, 160GB HD.
> >>
> >> I've tried both a bt848 based card which does the encoding in software and a
> >> PVR-250 MPEG2 hardware encoder. I'm interfacing with analog cable TV.
> >>
> >> My goal was to use this connected to my TV.
> >>
> >> I find the picture quality to be unacceptable. I don't own one of those
> >> commerical PVR's so I do not have a comparision. My expectations are high,
> >> I'm looking for good quality (close to the original broadcast).
> >>
> >> Using the RTJPEG or the MPEG4 codecs yield poor results. MPEG4 with 'FMV'
> >> options turned on is not that great. The quality looks poor when things move
> >> fast.
> >> The PVR-250 is much better quality (at 4GB/hr its a bit of a hog). However,
> >> even the PVR-250 is not what I consider acceptable for everyday use (ie;
> >> always use live tv through the box).
> >>
> >>   The playback of the PVR-250 doesn't look too bad on a computer monitor,
> >> but my goal is not to run this on a computer. It seems the TV-out (S-Video)
> >> is the worst/weakest link in the chain. Just running the monitor next to the
> >>
> >>  Is this what I should expect on a large (36" TV)? Perhaps this is
> >> acceptable for everyone and I just have high expectations. I'm about to give
> >> up on the project.
> >>
> 

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-- 

Kirby Vandivort                      Theoretical and Computational Biophysics 
Email: kvandivo at ks.uiuc.edu          3051 Beckman Institute
http://www.ks.uiuc.edu/~kvandivo/    University of Illinois
Phone: (217) 244-5711                405 N. Mathews Ave
Fax  : (217) 244-6078                Urbana, IL  61801, USA