[mythtv-users] Adjusting Brightness Levels

David Vasquez vasqued2 at yahoo.com
Sat Feb 3 17:30:16 UTC 2007

I've been trying to adjust the brightness of my
recordings because they were too dark.  I've tried
multiple ways with mixed success.  I have two separate
capture cards (both PVR-250's) and a firewire

First, I adjusted the Recording brightness value in
the channel table but the cards behaved differently
and it seemed like some recordings weren't getting the

Second, I tried adjusting the Playback brightness and
this worked fine until I tried to watch a DVD and I
needed to readjust the Playback brightness back to its
original value.

Third, I found a comment in the Wiki that per-capture
card video adjustments were included in 0.20.  I then
looked at the capturecard table and noticed
brightness, contrast, etc. columns.

I also noticed that one capture card has brightness =
5240 and the other to 5784.  Also, the contrast for
one card is 0 and the other is 65261.  I suspect that
this is what is causing my cards to behave

Any information on how to use the values in the
capturecard table vs. the channel table would be


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