[mythtvnz] Update on DTT Debugging at mythtv.co.nz

[Michael Dilger]

Steven Ellis wrote:
> Just posted a quick update on the DTV and Linux and the DTT Debugging
> pages at http://www.mythtv.co.nz.
>
>   
nicely.
> There are also some additional tips on DTT playback.
>   
You might want to add a suggestion for skiploopfilter=$SOMETHING to the 
lavdopts, as the filtering step is usually the most processor intensive 
part of H.264 decoding.   It will leave things blocky, but at least when 
performance is taxed the video will keep playing and usually stay in 
sync.  That's better than having it jam up and crash out.
> Michael - Can you send me some more details on your setup
>   
OS    Gentoo  2.6.24
CPU    AMD AthlonXP 3200+
RAM    1 GB
Graphics    nVidia 6600

576i   artifacts, usually of the motion prediction blocky kind.

720p   If I dumpstream and play it back, it is clean, no artifacts, 
looks wonderful.  But I can't play it real-time from the dvb:// device 
because of performance reasons (decoding is too intensive, and input 
buffers overflow)

1080i   sometimes it plays cleanly, even in real time, for a while, but 
usually it freezes on one frame and spills buffers onto my livingroom 
carpet.

Radio   Yes, perfectly.