[mythtv-users] HDTV playback & GF4

[Andrew Dodd]

Quoting Kent Williams <kent2 at optusnet.com.au>:

> Well, I went out and got a GF4 MX 440 and recompiled the latest CVS with
> the addition of -march-pentium4 in libavcodec.pro.
> 
> Now when trying to watch the HDTV channel, things seems much smoother
> but I still get stuttering, ie, I get about a second of nice smooth
> video then a short stutter, followed by a slightly garbled frame, then
> another smooth second, etc, etc.
> 
> While all this is happening, CPU usage is doesn't seem to crack 50%, so
> that is no longer the issue. I started to suspect the signal strength so
> enabled the DVB signal monitoring for a 15 minute recording I just made
> with an interval of 60 secs. I get the following:
> 
> Recording period from Sat Feb 21 17:04:00 2004 to Sat Feb 21 17:20:00
> 2004
> Card: 6 Min SNR: 0 Avg SNR: 56574 Min BER: 426 Avg BER: 516 Cont Errs: 0
> Overflows: 0
> 
> Incidentally I tried to playback a DVD using Xine and noticed a similar
> problem - there were occasional pauses during playback. Perhaps the
> indicates that something else is the problem.
> 
> I'm using an ASUS P4R800VM. Perhaps there are some driver / other issues
> with this board and Linux?
> 
> Also, should de-interlacing filters, etc still work with XvMC?
The only deinterlacing method that works with XvMC is the "onefiled"
deinterlacing method.  (i.e. it drops all odd fields or all even fields, only
displaying the other.)