<div dir="ltr"><div>Thank you very much for the replies and the very detailed information from Mark!</div><div><br></div><div>This gives me a base to start looking - I was considering the 3400G but wasn't sure if that would be enough - I might start with it and then consider discrete options later.</div><div><br></div><div>Regards,</div><div>Deyan</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Feb 1, 2021 at 1:28 AM Mark Kendall <<a href="mailto:mark.kendall@gmail.com">mark.kendall@gmail.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">On Mon, 1 Feb 2021 at 08:11, Stephen Worthington<br>
<<a href="mailto:stephen_agent@jsw.gen.nz" target="_blank">stephen_agent@jsw.gen.nz</a>> wrote:<br>
> For (relatively) low power, try looking for fanless cards, such as the<br>
> Nvidia GT1030s. I am not sure how good their 4k support is as I do<br>
> not have a 4k TV yet, but they do have at least basic 4k support.<br>
<br>
As Stephen has said, I think the GT1030 is about the minimum for good<br>
NVDEC decoding coverage (if you are looking to the future and moving<br>
away from VDPAU), it is more than powerful enough and isn't a power<br>
hungry monster. (I use one myself for testing). Older cards will<br>
probably give you adequate decoding of just H264/MPEG2 (either with<br>
VDPAU or NVDEC) if you are just looking for handling broadcast<br>
material.<br>
<br>
In terms of discrete cards, any more recent AMD card is probably more<br>
than capable as well, is better supported under linux but they don't<br>
seem to do small, low power cards like Nvidia (I'm using an RX 460<br>
atm). I also use the integrated GPU with an AMD 3400G (VEGA 11?) and<br>
that is more than capable. (Both work well with VAAPI but VDPAU does<br>
not currently work with MythTV - not sure why).<br>
<br>
Intel wise, any CPU with integrated graphics from Coffee Lake onwards<br>
will give you good hardware video decoding coverage, though I'm not so<br>
sure how well the older models would cope with running the UI at 4K.<br>
<br>
The biggest issue I've found with 4K support is not the resolution but<br>
the framerate - you need to check carefully whether your<br>
TV/GPU/Motherboard combination will support 60fps at 4K (I got caught<br>
out with my Intel CoffeeLake motherboard).<br>
<br>
Looking to what might be of interest in the future:-<br>
<br>
- I'm just testing GSync (Nvidia) and FreeSync (AMD) support in<br>
master - both of which work well (DisplayPort connections only)<br>
- HDR support is coming along (looks like only AMD and some SoCs) -<br>
I'm getting my displays to enable HDR but can't turn it off at the<br>
moment.<br>
- there is ongoing work to enable DRM video rendering and the new<br>
V4L2 request API - so fingers crossed the Pi4, for example, will be a<br>
much more capable option for 0.32 (improved H264 handling and HEVC 4k<br>
as well)<br>
<br>
Regards<br>
Mark<br>
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</blockquote></div></div>