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R. G. Newbury wrote:
<blockquote cite="mid44916886.5080609@mandamus.org" type="cite">
<pre wrap="">Pavol Droba wrote:
</pre>
<blockquote type="cite">
<pre wrap="">On Tue, Jun 13, 2006 at 03:24:15PM -0400, R. G. Newbury wrote:
</pre>
<blockquote type="cite">
<pre wrap="">James D wrote:
</pre>
<blockquote type="cite">
<pre wrap="">Has anyone actually got this to work well?
I've read this post to the dev list:
<a class="moz-txt-link-freetext" href="http://mythtv.org/pipermail/mythtv-dev/2005-December/042588.html">http://mythtv.org/pipermail/mythtv-dev/2005-December/042588.html</a>
but I can't even get close to the results he claims.
With Via XvMC selected I can actually watch HDTV without the CPU being
the bottleneck, but some channels / programs it will be very close. CPU
usage is usally 70% - 95% watching HD content depending on the format
and program. The video is smooth enough, but the audio is choppy no
matter what I do. Enabling AC3 passthrough makes it much worse... any ideas?
The other thing is the video only works on 720p and SD channels, 1080
channels just show a blank screen with audio (that isn't choppy
ironically). Perhaps I need to make the code adjustment from the post
above? I'm hesitant since I rather rely on gentoo than do a hand
compile, but you can only set the framebuffer memory to 64M max in the
BIOS, so I'm suspicous there isn't enough video memory for 1080. I've
set the framebuffer to 64M, I've got 512M in the box... I wonder if the
bus could be the bottleneck??
Would appreciate if anyone who has watchable HD on an EPIA would share
what they did.
</pre>
</blockquote>
<pre wrap="">You DO realize that the chipset on the SP13000 will NOT actually do full
HD? The limit is 1024x1024 apparently to VGA and something less through
the S-video output (limitation of S-video??)
</pre>
</blockquote>
<pre wrap="">
This information is not correct. The limit applies to Unichrome (non pro) chipsets.
SP13000 have UnichromePro chipset and should be able to decode HD.
However, it cannot realy play it right now on MythTV as far as I know.
There was a discussion on the openchrome list. Apparently mythtv tries to allocate
more frames beforehand than could actualy be sqeezed into the graphic
card's memory.
The HD playback will not be functional over TV-out, since it is not HD ready,
you will have to use VGA port.
Regards,
Pavol
</pre>
</blockquote>
<pre wrap=""><!---->
Sorry Pavol, but the limit is 1024x768 for the VT1623 chipset (and
probably less for the VT1622. You have to dig around on the various VIA
sites, and search on VT1623 to find relevant information. I cannot
remember or find exactly which pdf or page where I found that
information. And I cannot find it right now. It was on the via-embedded
site I think. Via actually keep this information very well hidden,
although they boast about the chipset having 'TV -out' capabilities they
will not give specifications or limits.
Moreover, on the SP series you are probably going to be limited by the
S-video in terms of what HD you can push to the TV, so the limits of the
TV-out chipset are irrelevant. I CAN watch HD level content on my
monitor, with the SP13000, but my monitor is, of course, connected to
the VGA output and the display monitor (a Phillips 21") will do better
than 1908x1080 itself.
They are slightly more forthcoming with the VT1625 chipset which is in
the new EN boards (and one of the nano boards IIRC). That chipset will
do the full 1980x1080i. They are proud of that!
Geoff
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</pre>
</blockquote>
Given the speed and power consumption of their CPU and motherboard they
should be quite proud of it. If they actually understood open source
then the rest of us might be proud of them too.<br>
<br>
W<br>
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