[mythtv-users] TBS2603 HDMI to Ethernet h.265

Nick Skarott meow at tunaweb.net.nz
Sat Dec 22 04:35:19 UTC 2018

> On 22/12/2018, at 15:22, Stephen Worthington <stephen_agent at jsw.gen.nz> wrote:
>> On Fri, 21 Dec 2018 14:33:12 -0600, you wrote:
>> Hi,
>> I have a TBS2603, which is working very well for me. If I switch it to 
>> send h.265 instead if h.264, I get a black screen. Does MythTV 29 not 
>> support h.265 video in yet?
>> Gerald
> If you are using an Nvidia card with VDPAU, then you may need to
> create a profile that will play H.265 using the CPU to decode.  MythTV
> does not yet support H.265 GPU decoding, although I think I saw a
> message where the dev doing the video decoding was looking at
> implementing it in v30.  And older Nvidia cards do not do H.265
> either.  You do need a decent CPU to do H.265 decoding also.  I do not
> know if the decoding code is multithreaded - if it is not, then you
> need a fast CPU rather than multicore.

For reference: nvidia has H.265 decode support only on pascal based cards (GeForce 1000 series) with the exception of 2nd gen Maxwell based cards using a GM206 core (GTX750, GTX950 and 960 non-Ti only) - CPU decode so far I’ve seen that H.265 does seem to thread nicely on decode, my i7 3770K (4 core 8 thread cpu) handles 4K HDR decoding @ 24fps but it takes a beating getting well above 50% usage.

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