<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body text="#000000" bgcolor="#FFFFFF">
<div class="moz-cite-prefix">On 11/22/19 4:42 AM, Don Brett wrote:<br>
</div>
<blockquote type="cite"
cite="mid:a8b1b176-f833-b2c9-490f-0b01c234c86f@zoominternet.net">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<div class="moz-cite-prefix">On 11/22/2019 12:36 AM, Kenneth
Emerson wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CADzwnhX=_w1hvmE945-A3OpLWydR=j4bJhdDbHvt5Z8d1JEN_A@mail.gmail.com">
<meta http-equiv="content-type" content="text/html;
charset=UTF-8">
<div dir="ltr">
<div dir="ltr"><br>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Wed, Nov 20, 2019 at
1:49 PM Jay Foster <<a
href="mailto:jayf0ster@roadrunner.com"
moz-do-not-send="true">jayf0ster@roadrunner.com</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">
<div bgcolor="#FFFFFF">
<div>On 11/20/2019 9:52 AM, Kenneth Emerson wrote:<br>
</div>
<blockquote type="cite">
<div dir="auto"><span>I have 2 HDHR tuners: a quttro
and a dual. All programming is OTA. All recordings
are perfect except for 1 channel (NBC). Watching
recordings from this channel breaks up for 1
second or less whenever there is a large change in
the picture like when the broadcast throws up an
ID banner for the news program. It's as if the
stream is missing a type 'A' frame so it pixelates
until it gets the next A frame.</span><br>
<br>
<span>So I have experimented as follows:</span><br>
<span>Check signal with HDHR app: 100% for all three
measurements</span><br>
<span>use all the tuners (total of 6) -- all have
the problem</span><br>
<span>Connect a different antenna: same problem</span><br>
<span>Disable commercial flagging: same problem</span><br>
<span>Connect antenna to TV (live-no mythtv):
perfect picture</span><br>
<span>Use smart TV's software to connect directly to
HDHR: perfect picture</span><br>
<br>
<span>This tells me something is happening while
reading/writing the stream by the backend. I'm
running v30 on Ubuntu 16.4. None of the other
channels exhibit this behavior. The problem is
definitely in the recording and not the playback.</span><br>
<br>
<span>The recordings aren't unwatchable, just (very)
annoying. I don't know what else to try besides
reinstalling everything including upgrading to
Ubuntu 18.04. Does anyone have any ideas less
drastic?</span><br>
<br>
<span>-- Ken Emerson</span></div>
<br>
<fieldset></fieldset>
<pre>_______________________________________________
mythtv-users mailing list
<a href="mailto:mythtv-users@mythtv.org" target="_blank" moz-do-not-send="true">mythtv-users@mythtv.org</a>
<a href="http://lists.mythtv.org/mailman/listinfo/mythtv-users" target="_blank" moz-do-not-send="true">http://lists.mythtv.org/mailman/listinfo/mythtv-users</a>
<a href="http://wiki.mythtv.org/Mailing_List_etiquette" target="_blank" moz-do-not-send="true">http://wiki.mythtv.org/Mailing_List_etiquette</a>
MythTV Forums: <a href="https://forum.mythtv.org" target="_blank" moz-do-not-send="true">https://forum.mythtv.org</a>
</pre>
</blockquote>
It might not be the recording, but the playback. Many
NBC stations changed their MPEG2 encoding parameters a
while back which results in a data stream that the
Nvidia VDPAU driver/hardware does not handle well. If
you are using VDPAU for playback, you might try
switching to OpenGL or software decoding as a test to
see if that makes a difference. You could also try
viewing the channel with vlc from the hdhomerun_gui
application.<br>
Jay<br>
</div>
_______________________________________________<br>
mythtv-users mailing list<br>
<a href="mailto:mythtv-users@mythtv.org" target="_blank"
moz-do-not-send="true">mythtv-users@mythtv.org</a><br>
<a
href="http://lists.mythtv.org/mailman/listinfo/mythtv-users"
rel="noreferrer" target="_blank" moz-do-not-send="true">http://lists.mythtv.org/mailman/listinfo/mythtv-users</a><br>
<a href="http://wiki.mythtv.org/Mailing_List_etiquette"
rel="noreferrer" target="_blank" moz-do-not-send="true">http://wiki.mythtv.org/Mailing_List_etiquette</a><br>
MythTV Forums: <a href="https://forum.mythtv.org"
rel="noreferrer" target="_blank" moz-do-not-send="true">https://forum.mythtv.org</a></blockquote>
<div><br>
</div>
<div>Jay, David & Jim:</div>
<div><br>
</div>
<div>I want to thank you so much for your input. You were
spot on with the playback issue. I switched from VDPAU
High Quality to OpenGL High quality and the problem
vanished. Everyone (including the wife) is happy again.
I've been a fan of MythTV since February of 2006 and even
with the advent of streaming, my wife and I find the
majority of what we watch is OTA on Myth. It's been a
long time since I had to ask for help; very glad it's
still available. If y'all in the States, have a great
Thanksgiving.</div>
<div><br>
</div>
<div>BTW: Is there a reason why I shouldn't just continue
with the OpenGL playback profile?</div>
<div><br>
</div>
<div>Regards.</div>
<div><br>
</div>
<div>Ken Emerson </div>
</div>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<pre class="moz-quote-pre" wrap="">_______________________________________________
mythtv-users mailing list
<a class="moz-txt-link-abbreviated" href="mailto:mythtv-users@mythtv.org" moz-do-not-send="true">mythtv-users@mythtv.org</a>
<a class="moz-txt-link-freetext" href="http://lists.mythtv.org/mailman/listinfo/mythtv-users" moz-do-not-send="true">http://lists.mythtv.org/mailman/listinfo/mythtv-users</a>
<a class="moz-txt-link-freetext" href="http://wiki.mythtv.org/Mailing_List_etiquette" moz-do-not-send="true">http://wiki.mythtv.org/Mailing_List_etiquette</a>
MythTV Forums: <a class="moz-txt-link-freetext" href="https://forum.mythtv.org" moz-do-not-send="true">https://forum.mythtv.org</a>
</pre>
</blockquote>
<br>
Similar thing happened to me on an earlier version of MythTv,
running on Ubuntu 16.04. I've stayed with OpenGL ever since.<br>
<br>
Don<br>
<br>
Re: HD Hiomerun works better in HDHomeRun viewer than MythTV<br>
<a class="moz-txt-link-freetext"
href="https://lists.gt.net/mythtv/users/622959?search_string=HD%20Hiomerun%20works%20better%20in%20HDHomeRun%20viewer%20than%20MythTV;#622959"
moz-do-not-send="true">https://lists.gt.net/mythtv/users/622959?search_string=HD%20Hiomerun%20works%20better%20in%20HDHomeRun%20viewer%20than%20MythTV;#622959</a><br>
<br>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<pre class="moz-quote-pre" wrap="">_______________________________________________
mythtv-users mailing list
<a class="moz-txt-link-abbreviated" href="mailto:mythtv-users@mythtv.org">mythtv-users@mythtv.org</a>
<a class="moz-txt-link-freetext" href="http://lists.mythtv.org/mailman/listinfo/mythtv-users">http://lists.mythtv.org/mailman/listinfo/mythtv-users</a>
<a class="moz-txt-link-freetext" href="http://wiki.mythtv.org/Mailing_List_etiquette">http://wiki.mythtv.org/Mailing_List_etiquette</a>
MythTV Forums: <a class="moz-txt-link-freetext" href="https://forum.mythtv.org">https://forum.mythtv.org</a>
</pre>
</blockquote>
<p>I tried software decoding, which fixed the playback issue with
the NBC station, but it made the comm flag editing (for removing
commercials via lossless transcoding) so sluggish that it was
unusable. I went back to VDPAU.</p>
<p><br>
</p>
</body>
</html>