[mythtv-users] Where best to adjust color and how to test
Nick Morrott
knowledgejunkie at gmail.com
Mon Apr 23 01:26:08 UTC 2007
On 22/04/07, Lan Barnes <lan at falleagle.net> wrote:
> My playback is too red-yellow. The docs that I've seen say I can adjust
> for this at the recording side or the playback side. Is one "better"? Is
Do you see this colour inbalance on all channels, and when playing
back non-PVR-150 material/DVDs?
A great feature of analog recording in MythTV is being able to specify
colour settings for each channel's recordings. If non-recorded
playback is normal, you may find that different channels require
different colour level settings to get more optimal recordings. If you
adjust the playback settings for your particular display, you lose
this fine-grained tuning, and also affect all playback.
> there a test to determine which is off? Burn a DVD and play it in a DVD
> player? Compare the playback on a remote front end? Anything?
If you use the same box/display for testing, you will not really know
where the problem lies. I would record a file and try to play it back
on as many other displays (with well configured colour settings) as
you can - computer monitors, TVs, etc. This way you'll be able to
determine whether the source recording contains the colour inbalance,
or your display.
Note that different displays will have different colour gamuts, but if
the red-yellow inbalance is noticeable across a variety of different
display types, and other video types such as DVDs play normally, you
can be quite certain the PVR-150's levels need adjusting, not the
output display's.
Nick
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