[mythtv-users] Current generation low-power graphics card to use for 4K TV (both MythTV frontent and content)

Deyan mythtv at bektchiev.net
Mon Feb 1 21:47:40 UTC 2021


Thank you very much for the replies and the very detailed information from
Mark!

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.

Regards,
Deyan

On Mon, Feb 1, 2021 at 1:28 AM Mark Kendall <mark.kendall at gmail.com> wrote:

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