Date: Mon, 20 Feb 2006 08:01:02 +0100
From: Hans Verkuil <[EMAIL PROTECTED]>
I am not aware of any color issues, but the volume issue is a known
'problem'. If I remember correctly the latest MythTV can set the volume
per card (can someone confirm this?). This is the only real solution:
volume levels of a card are hardware dependent.
As far as I know, the volume level is -not- settable per-card in
Myth. I suggested this as a potential feature because my 350's level
is at least 9dB above those of my 250's, but the suggestion went
nowhere, and since I'm not running the current Subversion release,
I wasn't about to try to make a patch for it. (I may in the future,
once I can upgrade my current stable machines from 0.18.1 to 0.19,
which is the just-released-last-week non-SVN branch but which is
still getting many bugs shaken out of it.)
What you -might- be thinking of is that I'm currently "solving" this
problem with a trivial shell script that simply bashes the correct
register setting into the 350 every second, without fail, hence
overriding the initialization that Myth does at the start of a
recording and when changing the channel in LiveTV. However, I'm not
100% sure this isn't introducing some sort of timing race---I can't
actually jump forward or backwards in an mpeg stream more than a dozen
times without causing the card to wedge (leaves video frozen on the
screen that the GUI then writes characters "through" fragments of
video, like broken chromakeying) and I have to reboot to fix the card.
I don't have quite enough experience running with and without this
kluge to know whether the wedgeup happens even when I'm not constantly
bashing the card volume. Is this a common problem?
My suggestion actually included (extra credit :) being able to set
per-input levels as well (since often RF audio and composite level
aren't very comparable, and might not be adjustable at the end that's
generating the composite level without causing other problems if its
signal is being split [e.g., to also run straight into a TV]), and
even per-channel levels (since some channels run very hot).
The feature suggestion can (currently!) be found as the first bullet
item under "Hardware Support" at [1], with pointers to elaboration of
the idea in case someone(s) wanted to implement it in stages.
[1] http://www.mythtv.org/wiki/index.php/Feature_Wishlist
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