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<div class="moz-cite-prefix">On 9/20/19 1:31 PM, Josh Rosenberg
wrote:<br>
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<blockquote type="cite"
cite="mid:CAKmods6ANRNbQwnoM4KrQcSD2wCeeBr7D9S=0AHwDU3nSZfg+A@mail.gmail.com">
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<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif">Hey, all. I
just set up my new Raspberry Pi 4 4GB as a frontend, and I'm a
bit disappointed in performance. You can notice jitter easily
on sports programs of all sorts (most often during camera
panning), in news crawls at the bottom of the screen (most of
the time, but you'll occasionally get a second of smooth
performance), and so on. In fact, it's pretty similar to an
old post of mine when I described the same behavior on a
then-new Raspberry Pi 3B: <a
href="https://lists.gt.net/mythtv/users/603845"
style="font-family:Arial,Helvetica,sans-serif"
moz-do-not-send="true">https://lists.gt.net/mythtv/users/603845</a></div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif"><br>
</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif">I'm using
mythtv-light on Raspbian, with a 256MB GPU memory split
(though I'm led to believe this doesn't matter anymore), and
OpenMAX Normal for playback. (There is no OpenMAX High
available.) Of note is that there is plenty of free memory and
idle CPU capacity while the playback is jittering!</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif"><br>
</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif">My questions
are:</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif"><br>
</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif">1. Does anyone
see better performance on their Raspberry Pi, and if so, what
are you doing differently?</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif"><br>
</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif">2. Does anyone
see better performance using one of the other "standard
hardware" solutions, such as the Shield or the Fire Stick 4K?
If so, do you think it's worth buying that hardware? Have you
ever compared it to RPi performance?</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif"><br>
</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif">I'm really
trying to move off of the cheap slim-form-factor PC I bought
off ebay a few years ago, but at least that PC has VDPAU,
which is the only thing I've ever used for consistently smooth
playback.</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif"><br>
</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif">Thanks!</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif">Josh</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif"><a
href="mailto:mythtv@desh.info" moz-do-not-send="true">mythtv@desh.info</a></div>
<br>
</div>
</blockquote>
<p>I'm using 320MB GPU memory split and I don't notice much of any
problems on my 4GB RP4.</p>
<p>Jim A<br>
<br>
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