[mythtv-users] Gigabyte Brix Celeron N2807

[Mark Perkins]

> On 18 Nov 2015, at 1:44 am, Gerald Brandt <gbr at majentis.com> wrote:
> 
> 
> 
>> On 2015-11-17 07:57 AM, Gerald Brandt wrote:
>> 
>> 
>>> On 2015-11-17 07:27 AM, Tom Bongiorno wrote:
>>> On Tue, Nov 17, 2015 at 8:11 AM, Gerald Brandt <gbr at majentis.com> wrote:
>>>> Hi,
>>>> 
>>>> I just bought one of these units (http://www.gigabyte.com/products/product-page.aspx?pid=5038#ov). The price was right, and I had the RAM and SSD already.
>>>> 
>>>> The first thing I did was install Lubuntu and a mythfrontend.  It works pretty well, but my regular frontend is a quad core AMD with an Nvidia GT 730.  There are definitely quality differences in the video.
>>>> 
>>>> vainfo gives me this:
>>>> 
>>>> vainfo: VA-API version: 0.38 (libva 1.6.0)
>>>> vainfo: Driver version: Intel i965 driver for Intel(R) Bay Trail - 1.6.0
>>>> vainfo: Supported profile and entrypoints
>>>>       VAProfileMPEG2Simple            :    VAEntrypointVLD
>>>>       VAProfileMPEG2Simple            : VAEntrypointEncSlice
>>>>       VAProfileMPEG2Main              :    VAEntrypointVLD
>>>>       VAProfileMPEG2Main              : VAEntrypointEncSlice
>>>>       VAProfileH264ConstrainedBaseline:    VAEntrypointVLD
>>>>       VAProfileH264ConstrainedBaseline: VAEntrypointEncSlice
>>>>       VAProfileH264Main               :    VAEntrypointVLD
>>>>       VAProfileH264Main               : VAEntrypointEncSlice
>>>>       VAProfileH264High               :    VAEntrypointVLD
>>>>       VAProfileH264High               : VAEntrypointEncSlice
>>>>       VAProfileH264StereoHigh         :    VAEntrypointVLD
>>>>       VAProfileVC1Simple              :    VAEntrypointVLD
>>>>       VAProfileVC1Main                :    VAEntrypointVLD
>>>>       VAProfileVC1Advanced            :    VAEntrypointVLD
>>>>       VAProfileNone                   : VAEntrypointVideoProc
>>>>       VAProfileJPEGBaseline           :    VAEntrypointVLD
>>>> 
>>>> Is there anything I can do to tweak the video?  Kodi seems to give me better quality.
>>>> 
>>>> I'd probably be better off with the Brix i3 version and Intel HD 5500 video, but it has a fan and I'm not sure how much noise it generates.
>>>> 
>>>> Gerald
>>>> 
>>>> _______________________________________________
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>>> 
>>> Questions like this come up over and over again. They should continue to be asked, even if only to serve as gauge of the interest in Intel Graphics support.
>>> 
>>> Interlaced Video: You will surely see a difference in video quality. Mythfrontend does not utilize the latest deinterlacers provided by the Intel Graphics driver. Even if it did, I am not sure that they are as good as the Nvidia GPU deinterlacers. Kodi has a much larger developer group and most likely uses the latest features of the Intel Graphics driver.
>>> 
>>> Progressive Video: I would think that they would be the same, but I admit that I know little about decoding video. Maybe someone else can give better info on this one.
>>> 
>>> Buying the i3 version with Intel HD 5500 GPU will not improve your video quality at all.
>>> 
>>> -Tom
>> 
>> Interestingly, after I ran Kodi, the MythTV de-interlacing looked much better.  I'll have to experiment a bit.
>> 
>> Gerald
> 
> Hi,
> 
> Nah, I couldn't duplicate it.
> 
> The video is so bad under MythFrontend and the WAF is zero for Kodi, so I'll fix my Quad Core AMD/Nvidia GT 730 system and go back to that.  Too bad.
> 
> Gerald
> 
> _______________________________________________

Are you testing using LiveTV? At one point (IIRC) there was a bug that every other channel change (ie alternating) would revert to software decoding.

https://code.mythtv.org/trac/ticket/12319

Comment appears to indicate it is fixed in master only.
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