[mythtv-users] Mythtv v35 fails decode with Nvidia NVDEC

[James Abernathy]

On Fri, Feb 14, 2025 at 8:32 AM Roland Ernst <rcrernst at gmail.com> wrote:

>
>
> On Fri, Feb 14, 2025 at 1:44 PM James Abernathy <jfabernathy at gmail.com>
> wrote:
>
>>
>>
>> On Fri, Feb 14, 2025 at 7:08 AM Ryan Patterson <ryan.goat at gmail.com>
>> wrote:
>>
>>>
>>> On Thu, Feb 13, 2025 at 9:16 PM James Abernathy <jfabernathy at gmail.com>
>>> wrote:
>>>
>>>> On Thu, Feb 13, 2025 at 9:04 PM James Abernathy <jfabernathy at gmail.com>
>>>> wrote:
>>>>
>>>>> On Thu, Feb 13, 2025 at 8:54 PM James Abernathy <jfabernathy at gmail.com>
>>>>> wrote:
>>>>>
>>>>>> On Thu, Feb 13, 2025 at 8:27 PM Ryan Patterson <ryan.goat at gmail.com>
>>>>>> wrote:
>>>>>>
>>>>>>> I just upgraded to fixes/35 and it is not working correctly.
>>>>>>> Nothing will play when set to use the Nvidia NVDEC video decoder.
>>>>>>>
>>>>>>> The error displayed says, "Video Frame Buffering Failed Too Many
>>>>>>> Times"
>>>>>>>
>>>>>>> I switched to VDPAU decoding and playback works.  But I need NVDEC
>>>>>>> for 4K content.
>>>>>>>
>>>>>>> _____________
>>>>>>> Ryan Patterson
>>>>>>> May the wings of liberty never lose a feather.
>>>>>>>
>>>>>>>
>>>>>> What are you seeing? Any log errors?  I have a laptop with hybrid
>>>>>> GFX. Nvidia and Intel, so I can launch mythfrontend with pure Nvidia or
>>>>>> pure Intel. Since I've been told that using OpenGL only works best with the
>>>>>> current software and average CPU.  That even applies to RPI 4. I'm on v35
>>>>>> on everything so I can test it.
>>>>>>
>>>>>> Jim A
>>>>>>
>>>>>
>>>>> I did a quick test on my laptop and launched mythfrontend with
>>>>> dedicated GPU option. NVDEC would not even play for me. I switched to
>>>>> OpenGL High Quality and it played perfectly. Of course my laptop is pretty
>>>>> good. Intel© Core™ i7-10750H CPU @ 2.60GHz × 6.
>>>>>
>>>>> Jim A
>>>>>
>>>>>
>>>> I switched my laptop to Nvidia GPU only and rebooted. I got the same
>>>> error as you. However, using OpenGL High Quality was a perfect picture on
>>>> the Nvidia..
>>>>
>>>> Jim A
>>>>
>>>
>>> Thanks for confirming you see the same issue.  Yes, other decoders work
>>> (VDPAU, FFMPEG, etc.).  But my CPU is not powerful enough for h.265 HEVC 4K
>>> decode.  That is why I need Nvidia NVDEC.  Hopefully the issue is fixed
>>> soon.
>>>
>>> -Ryan
>>>
>>
>> You might want to open an issue on the github.com site for mythtv.
>>
>>
> You can try to set up different playback profiles, see last thread in
> http://lists.mythtv.org/pipermail/mythtv-users/2025-February/414942.html
> mythfrontend: playback settings
>
> Formats MPEG2VIDEO->VDPAU acceleration & OpenGL Hardware
> Formats H264->VDPAU acceleration & OpenGL Hardware
> Formats HEVC->NVIDIA NVDEC acceleration & OpenGL Hardware
>
> Roland
>
>
That setup worked for me but I can only test it on MPEG2 and H.264 m4v.

Jim A
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