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

Stephen Worthington stephen_agent at jsw.gen.nz
Mon Dec 24 01:34:54 UTC 2018

On Sun, 23 Dec 2018 18:09:58 -0600, you wrote:

>On 2018-12-23 10:49 a.m., Stephen Worthington wrote:
>> On Sun, 23 Dec 2018 08:56:24 -0600, you wrote:
>>> On 2018-12-22 10:57 a.m., Stephen Worthington wrote:
>>>> On Sat, 22 Dec 2018 08:36:20 -0600, you wrote:
>>>>> On 2018-12-21 8:22 p.m., Stephen Worthington 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, as only one core will be used.
>>>>>> _______________________________________________
>>>>> I'm using Kodi as a frontend (more wife friendly). It has an nVidia
>>>>> 1050, I believe. I've played h265 videos on Kodi, so I assumed the
>>>>> backend was the issue here.
>>>>> Gerald
>>>> Kodi does have H.265 support for using Nvidia GPUs, if the video
>>>> chipset is late enough to do H.265 acceleration.  Mythfrontend does
>>>> not have that support yet.
>>>> _______________________________________________
>>> So you're saying there's nothing in the backend to stop me from
>>> recording h.265.
>> No.  The way recording is done is to just copy the data in each stream
>> transmitted for the channel.  If H.265 is what is transmitted, then it
>> will be what is recorded.  So if you set the TBS2603 to H.265,
>> mythbackend will record that.  Then you need to have a way of playing
>> back those H.265 files.  In v29 with mythfrontend, that means you will
>> have to have a good enough CPU to do the decoding.  Hopefully H.265
>> decoding will be done in time to be in v30, but you would still need a
>> recent Nvidia card that does H.265 decoding.  If your card is a 1050
>> chipset, then that will certainly do H.265 in the GPU - I believe all
>> the 10xx series do it.  As far as I know, Kodi (and VLC and maybe
>> mplayer) already have the code to offload H.265 decoding to an Nvidia
>> GPU.
>What about commercial detection?

I have no idea if mythcommflag works on H.265.  I do not use it as it
does not work well enough to be any use on my local TV stations so I
turned it off.  It had no problem reading H.264 from our DVB-T
channels, but it had far too many false positives and false negatives.
It was a little better on our satellite pay TV service when it was
MPEG2, but still not enough to be useful.  The pay TV is mostly also
H.264 now, but I have not tried mythcommflag on it since then.  I do
not miss having it as mythfrontend makes manually skipping over
commercial breaks easy.  That is one reason I never liked Kodi as a
frontend - it is much harder to skip around in a recording using Kodi.

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