<div class="gmail_extra"><br><br><div class="gmail_quote">On Sun, Apr 22, 2012 at 4:18 PM, BobW <span dir="ltr"><<a href="mailto:bob_pub_mailbox-mytv@yahoo.com" target="_blank">bob_pub_mailbox-mytv@yahoo.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000"><div><div class="h5">
On 4/22/2012 6:02 AM, jakommo wrote:
<blockquote type="cite">I'm having trouble using my hdhomerun (HDHR3-EU) on
mythtv 0.25. All the SD channels are working fine but on HD
channels I get artifacts on LiveTV and recordings.<br>
I have a dedicated frontend/backend machine where I installed
mythbuntu 12.04 Beta 2 (mythtv 0.25) + all updates for mythbuntu
and mythtv.<br>
On another partition of the same machine I have my old
installation of mythbuntu 10.10 (mythtv 0.23-fixes) where
everything works fine including the HD channels, so I think its
not an hardware failure.<br>
First I thought it was an VDPAU problem but the artifacts are also
appearing using a non VDPAU profile.<br>
Using hdhomerun_config_gui and vlc from 12.04 HD works fine.<br>
As I'm aware that mythbuntu 12.04 is still in development I
installed mythtv 0.25 (atrpms) on my CentOS 6 fileserver and used
my Desktop as a fronted (Fedora 16 also atrpms). Same thing there,
the HD channels have artifacts.<br>
<br>
A while back I already posted my problem on the mythbuntu forums,
but as it seems its not a mythbuntu only problem. (I'm not
familiar with the rules of the mailing list, is it ok to post the
link to the forum here? I posted my logs there)<br>
<br>
I live in Germany and the setup is a satellite signal converted to
cable. As it works on 10.10 I think its not a problem.<br>
<br>
Everyone here has hdhomerun working with 0.25? (in Germany?)<br>
Any ideas what I can try?<br>
</blockquote>
<br></div></div>
I just went from 0.23 to 0.24 and 10.10 to 11.04 and I started
seeing similar behavior--more breakups in HD OTA signals. <br>
Searching on the SiliconDust website I found:<br>
<i>Packet loss<br>
On slower machines or machines under high load the maximum receive
socket buffer size for the system should be increased to 1MB:<br>
<br>
sudo sysctl -w net.core.rmem_max=1048576<br>
</i><br>
This seems to have helped my situation, however, I still think I am
getting more breakups under 11.04 than 10.10.<br>
<br>
The other thing the SiliconDust web site suggests is testing for
packet loss:<br>
<i>Low level test for network packet loss - ATSC/QAM/DVB:<br>
<br>
1) Run HDHomeRun Setup and go into the channel editor. Choose a
physical channel number (for example CH102). This is the number
before the - in the Tune column.<br>
<br>
2) From a cmd prompt run:<br>
"C:\Program Files\Silicondust\HDHomeRun\hdhomerun_config" FFFFFFFF
set /tuner0/channel auto:<channel number><br>
"C:\Program Files\Silicondust\HDHomeRun\hdhomerun_config" FFFFFFFF
save /tuner0 null<br>
<br>
Replace "<channel number>" with the physical channel number
from HDHomeRun Setup (e.g. 102).<br>
<br>
If you have more than one HDHomeRun unit then replace "FFFFFFFF"
with the device ID of the desired unit.<br>
<br>
You should see a series of dots. "n" indicates network packet
loss. "t" indicates a reception error. "s" is informational.<br>
</i><br>
(I have not tried this test yet.) I also upgraded to the latest
firmware, (hdhomerun_atsc_firmware_20120405.bin)<br>
<br>
What is really frustrating to me is that my TV's built-in tuner gets
at least 3 other stations which just break-up on my HDHR. (Although
it was like that before as well.)<br>
<br>
Bob<br>
</div>
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<br></blockquote></div><br>Hi Bob,<br>thanks for your reply.<br><br>I increased net.core.rmem_max to 1048576 but I'm still getting the artifacts.<br>Also tested for packet lost but I get:<br>-- Video statistics --<br>
49056 packets received, 0 overflow errors, 0 network errors, 0 transport errors, 0 sequence errors<br>So it seems noting is lost.<br><br>I think it has to be a software thing as it works fine after rebooting to 10.10 and also works from 12.04 using vlc.<br>
<br>Jakob <br><i></i></div>