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<div class="moz-cite-prefix">On 12/29/18 1:32 PM, Ashu Desai wrote:<br>
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<div dir="ltr">On Fri, Dec 28, 2018 at 9:29 AM Peter Bennett
<<a href="mailto:pb.mythtv@gmail.com"
moz-do-not-send="true">pb.mythtv@gmail.com</a>> wrote:<br>
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On 12/27/18 8:34 PM, Ashu Desai wrote:<br>
> Hello all<br>
> Looking to get directions on what/how regarding
building a frontend <br>
> that is capable of playing UHD 4K movies please.<br>
><br>
> I have a Ubuntu backend on a VM working great with my
Zotac ION CentOS <br>
> frontend. However, it does NOT play TrueHD, DTS-HD and
def not any <br>
> UHD/4K movies.<br>
><br>
> So I thought maybe invest a bit and build out a
frontend that is <br>
> capable of playing 7.1 lossless audio as well as 4K
movies.<br>
><br>
> Any suggestions please? I saw a few posts about Amazon
Firestick 4K <br>
> but someone said it does not play 4K so that burst the
bubble...<br>
><br>
> Thank you! Happy Holidays!<br>
><br>
><br>
> Ash<br>
><br>
The following applies to current master / planned V30.<br>
<br>
You can play 4K content with some limitations. I hope to get
those <br>
sorted out.<br>
<br>
VDPAU will not play 4K.<br>
<br>
You can use software decode plus OpenGL (one of the OpenGL
profiles) if <br>
you have a powerful enough processor, and set the number of
CPUs <br>
appropriately. This works best on Intel integrated graphics.<br>
<br>
You can also use VAAPI or VAAPI2 profiles to play 4K
(requires Intel <br>
integrated graphics).<br>
<br>
Playing 30 fps 4K works fine. With VAAPI 60fps works fine.
With VAAPI2 <br>
or OpenGL, some frames are dropped when playing 60fps 4K.<br>
<br>
10bit or 12bit color unfortunately gets downgraded to 8bit.<br>
<br>
These problems I hope to fix. I plan to fix VAAPI2 so that
is can play <br>
60fps 4K. VDPAU will not play 4K but I will be adding NVDEC
support for <br>
NVidia devices.<br>
<br>
The extra audio formats will likely be decoded in software.
I don't have <br>
any samples and I don't know if they work.<br>
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<div>Peter</div>
<div>Thank you for the reply. I apologize - I should have
mentioned - I am looking for hardware help - need to find
out which direction I should go to buy/set up a frontend
that can play 4K.</div>
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<div>Like I mentioned, I heard of Firestick 4K but apparently
it doesn't play 4K videos!</div>
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<div>Thank you!</div>
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<p>I just complete the upgrade of my Front End to a 4K Nvidia
Shield. It's plugged into the HDMI port of a UHD Samsung 4K TV. I
have it networked to the mythtv-backend via GBe cable. But all
the content I have access to for Mythtv is 1080i/720p. I can
stream 4K content from a number of sources but all are thru a
service like Prime Video, etc. I went this way because of cost and
video quality. It's a perfect frontend for Mythtv-frontend, Kodi,
Sling, ESPN, Prime Video. As an added benefit it's a very good
gaming platform, but that's based on an old guys opinion who
rarely games. My son things it's pretty good, but he's a slave to
the PC gaming experience.</p>
<p>Jim A<br>
<br>
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