[mythtv-users] [OT] Hardware (video and audio card) questions,
differences and features?
johan at vulturest.com
Wed Dec 28 02:50:06 EST 2005
> I'm looking for an easy-to-use website that will explain the
> differences of the nvidia cards to me. MythTV says I need a Geforce 4
> or better to do XvMC, but I've got an MX440 and it barely (nearly
> unusably) does it. I am looking for a faster/better/newer card and
> want to know the difference in the 5200, 6200, 6600, GT versions of
> those, the 4000...
I use the SVideo out on an MX440 and had little luck with XvMC in 0.18.2
(the fixes release), but am having far more luck with the latest SVN -
it's totally watchable and lowers my CPU usage quite significantly (to
the point where HD channels used to be unwatchable, but now only
ocassionaly skip with a 'pre-buffering pause').
> I'm looking for a card that actually works (well) in linux/mythtv with
> it's Digital Coax output. I have yet to actually be able to get
> anything to play through my digital out and have my receiver pick it
> up as a Dolby Digital sound source (when it's a HD recording with DD
Believe it or not, I'm using the AC97 onboard audio on a KT600 chipset
mainboard through the SPDIF out.
All I did was enable IEC968 output in alsamixer, turn IEC968 playback
all the way *down* (it seems to work in reverse?), and pointed Myth to
use alsa:spdif as the output device.
For mplayer, I use a command line similar to:
mplayer -fs -zoom -quiet -vo xv -ao alsa:device=spdif -ac hwac3,
(NOTE: extra ',' at the end is required, tells mplayer to fallback to
other codes if it can't access hardware ac3, or the stream is not ac3 at
> The best I've gotten is a loud repeated 'beat' (which is my best
> description, I would guess it's an analog version of the digital
> pulse?) which I quickly mute or kill. I've tried/used a cmipci, an
> emu10k1, and onboard via-82xx, all through very new versions of ALSA,
> with no avail.
That's it, my AC97 chipset uses the via-82xx driver.
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