[vdr] Any really working HD video output systems for VDR?

Mattia Rossi mattia at technologist.com
Fri Jun 5 15:20:45 CEST 2009


On Fri, 2009-06-05 at 13:19 +0300, Vesa wrote:
> > -----Original Message-----
> > Behalf Of Mattia Rossi
> > Subject: Re: [vdr] Any really working HD video output systems for VDR?
> > 
> > At the moment I have a running system with one s2-3200, vdr1.7.5,
> > extensions patch, reelbox3, filebrowser,xinemediaplayer (took me about
> > a
> > weekend of fiddling with patches, drivers, small corrections to the
> > reel code, lurking the german boards and swearing, lots of swearing)
> > and some other plugins, hd output on the eHd is really nice, I am not
> > so happy with the quality of SD output either at native resolution or
> > scaled to 1080i .... the non scaled quality is in my opinion much worse
> > than what I have on my FF card, and the scaled quality depends on the
> > media, but it is generally bad, in my opinion.
> > 
> 
> Reelbox eHD DA is poor, so there is no any reason to use analog output. HDMI output is ok, but there is couple items to remember: chipset have only one scaler/video processor. So if analog output is active, video is for it. HDMI gets same -> video is not pixel to pixel, it is always scaled! To get right quality out of HDMI, turn off analog output completely.
> 
> Second issue is caused by HDMI itself, there is very few displays with 576i/480i support. With HDMI eHD reads display capabilities and end result is most of cases 576P/480P even that ui tels 576i/480i. eHD internal processing for i->P is poor, so SD looks quit bad.
> 
> When you get combination where eHD outputs pixel to pixel 576i (or what native resolution of video is) signal over HDMI/DVI and TV scales it properly, quality is perfect. Much beter than FF card with RGB, it is clear with comparison how DA-AD process lost one bit of every color channels.
> 
> If reelbox-3 plugins would work better (working FF/FR, no delays on replay commands) it is the best video output currently. It outputs original video/audio as it is with out micro stuttering.
> 

First of all, thanks for the explanation, I believe it is the first time
I manage to understand why these settings are needed, the automatic
translation from google is borderline between funny and completely
useless.

> Here is proper settings for eHD, when you have HDMI/DVI display and it support all resolutions (576i, 720p and 1080i in Europe)
> 
> Output: HDMI
> Analog Output: off
> Display Type: 16:9
> Aspect Rations: Fill to Aspect
> Resolution: 1080
> Refresh Rate: 50Hz
> Deinsterlacer for SDTV: Off
> Resolution change: Media resolution
> OSD scaling: Fill to screen
> 
> With proper display, digital video is now 1:1 on pixel/frame level.
> 

Well, I have to say that I already used this setup since after trying
almost all the combinations this was giving me best results.
I have a mitsubishi HC-4900 VPR that has no problems displaying
576i/480i through the HDMI connection.

That said, while I agree that for still images and for videos with very
small amounts of panning the eHd image is much better (color definition,
sharpness) in all other cases , and much more evident with low bitrate
streams (that alas are almost the norm with Sky Italy), the mpeg
rendering of the FF card is much more smooth than the eHd, the eHD also
has problems with the rendering of white lines and/or characters (jagged
lines, blurry borders) .

So, either something's still not working with my setup (no pixel to
pixel output from the eHd, is there any way I can check ?) or I stand
with my s_subjective_ opinion that the FF output, in terms of MPEG
rendering is much more polished than the eHd output for SD content

I sincerely hope that I'm wrong, and that I still have to find the
correct setup for the eHd that will allow it to output an
unprocessed/uninterlaced image

Regards

Mattia

-- 
---MR.-




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