[mythtv-users] brightness, sat. & contrast problems in 0.15 going from Live TV -> recording

[Stephen Atkins]

I've been trying to get myth going on my gentoo system for over a week now with
little success.  My problems stem from sata and ivtv problems.  In other words
sata is not stable for my SiL3512A in 2.6 kernels and ivtv (0.1.9) isn't stable
in 2.4.26 for some reason (mythbackend crashes and the driver takes the rest of
the machine with it).  My only problem with the recording seems to be every 15
to 20 mins I get a flash of a frame that shouldn't be there.  It's not a big
problem just a annoyance.

Stephen

> -----Original Message-----
> From: mythtv-users-bounces at mythtv.org
> [mailto:mythtv-users-bounces at mythtv.org]On Behalf Of john lawler
> Sent: Friday, July 23, 2004 2:56 PM
> To: mythtv-users at mythtv.org
> Subject: [mythtv-users] brightness, sat. & contrast problems in 0.15
> going from Live TV -> recording
>
>
> Hi guys,
>
> I started using MythTV about 6 months ago w/ version 0.13 or 0.14, I
> think it was.  First tried Gentoo, couldn't get that to work (probably
> had a kernel w/ power mgmt problems in it), then went to FC 1 with
> Jarod's guide and got everything pretty much working well and used it
> for a few months like that.
>
> Then, xmltv (or w/e that was) broke and I decided I'd just wait until I
> could reinstall to Gentoo (see, it's my preferred distro) before I did
> the 0.15 upgrade.  So that's what I did, and I finished that up in the
> last month or so.  So 0.15 seems to be working great with these specs
> for me:
>
> 	512MB RAM on a Chaintech 7NIF2 board with Athlon-XP 2400+ & PVR-250
>
> 	2.6.5-gentoo-r1
> 	ivtv-0.1.9
> 	nvidia 4363 binary driver (using S-vid out to TV)
>
> oh, also I mostly followed this guide, specifically for gentoo, which
> was mostly correct for my purposes:
>
> 	http://wopr.yi.org/mythtv.html
>
> Having said all of that, here's the 'but':  I never had this problem in
> 0.14 under RedHat (and the 2.4 kernel), but now whenever I start
> recording in my "low res" VCD mode (my Default profile), the picture
> often becomes too dark, the saturation somewhat too high and the
> contrast too low.  When I look at the test_ioctl output during the
> record, the values are normal (right in the middle of the ranges for all
> of those values, the ivtv defaults).
>
> My Default profile is 352 x 240 resolution (w/ the defaults for
> bitrate), and I've noticed when watching Live TV (I have that set to the
> highest resolution, 720 x 480 or w/e it is), the colors on the exact
> same station look great, then as soon as I press record on that station
> (and it goes to the Default profile, I suppose), the colors immediately
> change, even though test_ioctl shows them the same.
>
> I've searched the archives on this problem and am not seeing anyone else
> with a similar problem, unfortunately.
>
> Other than that, and occasional minor video & sound jittering (seems to
> be near commercials, but that may be a coincidence), 0.15 running on my
> 2.6 kernel seems to work great (no lockups or crashes yet).
>
> Does anyone feel my pain?
>
> jl
>