[mythtvnz] HDHomerun - VLC on Linux - Yes - well sort of!

[Steven Ellis]

On 30/03/2009, at 11:49 PM, Tortise wrote:

> Steven
>
> Re CPU I was quoting from http://www.silicondust.com/products/hdhomerun_dvbt 
>   I expect you are correct.

> Out of interest what signal strength and quality are you testing with?

My office has somewhat lower signal strength due to additional  
splitters, but around 62/59 as shown here
http://www.mythtv.co.nz/mythtv/images/hdhomerun/linux_gui.jpg

The only picture break up I tend to see is down to the CPU, or if i'm  
streaming over a wireless network.

Steve

>
>
> I've moved my unit up to the top of the antennae tree here to now  
> get 100% strength and 85-87% quality.  It probably improves things
> a little, the issues continue, just less so.  Video breaks on TV1 do  
> not seem associated with any appreciable S/Q % reduction's
> outside the minor variation that occurs, instead they do seem to be  
> associated with major video scene changes.  TV1 is curiously and
> currently displaying better than C4.  I look forward to running up a  
> VDPAU box.
>
> Kind regards
> David
>
> ----- Original Message -----
> From: "Steven Ellis" <steven at openmedia.co.nz>
> To: "MythTV in NZ" <mythtvnz at lists.linuxnut.co.nz>
> Sent: Monday, March 30, 2009 6:55 PM
> Subject: Re: [mythtvnz] HDHomerun - VLC on Linux - Yes - well sort of!
>
>
>
>
>>
>> Silicon Dust's website suggests the 2.8 GHz Pentium 4 (or similar)  
>> for HD
>> playback is the minimum hardware specification.  The test rig seems  
>> to
>> exceed that.  Seems to me the solution likely also lies in VDPAU,  
>> however
>> for me even C4 does not play smoothly, I would have thought there was
>> enough grunt to manage C4, certainly SD MPEG2's of the same C4  
>> content
>> play fine, so perhaps there are things they can address??  Problems  
>> also
>> could lie in the antennae strength (seems unlikely given other DVB- 
>> T gear
>> is receiving ok) VLC's ability to play, maybe the LAN or ?  Given the
>> HDHomeRun is new to the NZ DVB-T market it would not surprise me if  
>> some
>> firmware upgrades prove to be necessary to get this working to the
>> standard I was expecting.
>>
>
> sadly the Silicon Dust specs are for HD MPEG2 broadcasts like the US  
> and
> AU. The specs for HD H.264 like NZ are far greater. My X2-6000+ can do
> TV1/2 but sometimes struggles with TV3. On my single core 3200+ I  
> can do
> the SD channels (C4 etc) but even TV1/2 struggle.
>
> Really we need VDPAU or similar hardware acceleration for HD playback.
> Your signal strength is a little low but nothing extreme.
>
> Steve
>
>
> --------------------------------------------
> Steven Ellis - Technical Director
> OpenMedia Limited - The Home of myPVR
> email   - steven at openmedia.co.nz
> website - http://www.openmedia.co.nz
>
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Steven Ellis - Technical Director
OpenMedia Limited
email   - steven at openmedia.co.nz
website - http://www.openmedia.co.nz

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