[mythtv-users] New HD setup, couple questions.
charriglists at bellsouth.net
Tue Jan 23 16:02:59 UTC 2007
So I broke down and bought an HDHR. Neat little device. Easily
configured, works like a charm. My mythtv box is a slightly older setup.
Athlon XP 1800+
MSI FX5200 (DVI,VGA,SVIDEO)
400 Gig Seagate
ASRock 741GX based motherboard.
Built in Audio (no digital out :-( )
Built in 100 MB nic
Gentoo using the latest 0.20 stable release in portage. 2156?
Sony 50" LCD projection set connected via DVI->HDMI adapter
This set has worked well for me since myth 0.7 or so.
I've been able to get this modest hardware working with HD pretty
decently. Using XVMC and custom modelines for my tv. I've managed to
create and use the following modes.
Looks awesome, no de-interlacing necessary by mythtv.
Max 65% CPU
Was able to watch a 1080i recording, record a 1080i & a SD program all
at the same time without a much as a hiccup.
The native mode of the TV, also the mode the gui runs in.
Uses it for mythvideo (mplayer) and most myth functionality.
About 70% CPU (forgot exactly)
Works but source video needs to be deinteraced. (one of the later
questions). Works well for emulators.
Works but there are deinterlacing artifacts, seems to be hardware (tv or
Instead of trying to deinterlace, I use the feature in myth to switch
modes and use the deinterlacer in the tv to do the work. I also have
dishnetwork which I capture using the PVR250. I switch to 480 mode to
be able to use the wide zoom feature of the TV. You know that mode that
progressively stretches the image as it goes towards the edge of the TV.
That works great. It results in a sharper image than scaling and
My questions are two fold. Because I have the 1080i modeline in the
xorg.conf file, mythtfrontend starts up at that mode and scales fonts,
themes etc to that resolution, though it almost immediately switches to
1280x720p because of the mode switching options I set to run the GUI in
1280x720p. The fonts/graphics are really small. (Yes I have made the
fonts bigger in the setup screens) Is there a way to convince mythtv to
scale to a preset mode (1280x720p in this case) other than the mode it's
The second question has to do with deinterlacing. Because I couldn't
get a good 480i mode working on my setup I have to use the 480p, thus I
have to deinterlace the the signal I get from the pvr 250. Problem is
that deinterlacing seems to be a all or nothing option at this point.
Needless to say I don't want to deinterlace the 1080i stream, just the
480i. Is there a way to deinterlace based on resolution, I assume it
would have to be a hack since I couldn't find anything in the
documentations, menu options, or the list. I would like to add it to
the resolution switching options if it decided which way it should be
I'd like to thank the developers for an awesome project and the user
community for all the interest and support in this project.
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