[mythtv-users] Just built MythTV, beginner questions
Patrick Reynolds
reynolds at cs.duke.edu
Tue Mar 16 17:53:40 EST 2004
On Tue, 16 Mar 2004, maarten van den Berg wrote:
> > PVR-x50 cards record in MPEG2. MythTV has no option to encode MPEG2 in
> > software, only RTjpeg and MPEG4.
>
> Oh. Why is that ? Is mpeg2 encoding that much harder than mpeg4 ?
> (not that it changes anything, just being curious)
I believe that MPEG4 produces better video at (almost) all bitrates. And
at least in their current Linux software implementations, MPEG4 is also
faster.
> I'm back at default settings now, having a fast cpu, but I'll try the 576
> setting. But I was led to believe PAL was 720 lines, not 576 ? Or is that
> including the non-visible lines ? That would explain it.
Most variants of PAL have 576 lines visible out of 625. NTSC is 480 of
525.
> Okay. I'm still trying to figure out all the keys and their meaning...
Have you read keys.txt yet?
> > Plenty of discussion on that in the archives, even within the past week.
>
> I don't know if it's the new case or the new CPU or whatever, but I now get a
> reasonably good picture, better than Xawtv does (in my opinion). I attribute
> it to the fact that the PCI slot is much further away from the CPU now. So
> this has become a moot point for now. Sorry if I missed that thread though.
http://www.gossamer-threads.com/perl/mailarc/gforum.cgi?post=113777;search_string=video%20quality;guest=2618879&t=search_engine#113777
--Patrick
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