[vdr] OT: Finnish Yle HD olympics channel..

Pasi Kärkkäinen pasik at iki.fi
Tue Aug 12 14:45:14 CEST 2008


On Tue, Aug 12, 2008 at 03:07:57PM +0300, Seppo Ingalsuo wrote:
> Pasi Kärkkäinen wrote:
> > Maybe try with recent mplayer (from svn).. and give it 
> > "-demuxer lavf -lavdopts fast:threads=2 -no-correct-pts" or something similar..
> > you can also try with threads=4 etc.. 
> >   
> "mplayer -demuxer lavf -lavdopts fast:threads=4 -nocorrect-pts ..." 
> gives steady but slow motion (roughly 50% speed) video. It is weird that 
> the load on CPU1 and CPU2 is less than 40% during playback according to 
> gnome system monitor. Somehow mplayer is not able to max both CPUs close 
> to 100%.
> 
> With mplayer I noticed that the video is 1080i -- it is silly to 
> broadcast interlaced crap. That probably explains why vdr xinelibout 
> choked due to greedy de-interlacer that is pretty power consuming for 
> 1080i. Other channels such as Arte HD (arte 
> HD;ZDFvision:11362:hC23M5O0S1:S19.2E:22000:6210:6221=deu,6222=fra:6230:0:11120:1:1011:0) 
> work OK.
> 

Actually interlaced video kinda makes sense for sports and other live
video.. you get 50 fields per second, so the movement is smooth..  

If you look at interlaced video on a progressive display, then you need to do pretty
heavy deinterlacing, preferrably using "full motion" methods to get 50 or
100 fps output.. takes a lot of CPU. Check http://www.100fps.com

Where did you get that stream from btw? 

Digita is broadcasting this channel as 720p in DVB-T.. dunno if it's 25 fps or 50 fps.. 
Hopefully not 25 fps..  

In what format is that Arte HD? 

-- Pasi



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