Jerky playback
Jean-Paul Saman
jpsaman at wxs.nl
Sat Jul 7 23:34:50 CEST 2001
Chris Jensen wrote:
>
> Hi,
> I've got vlc running now with x11 output (the other two still segfault). But
> the playback is kind of choppy and I think sometimes the audio slides faster
> and slower causing the pitch of music being played to slide.
> It starts out dropping about every 10 or so frames but as I get to the end
> of a movie it seems to be more like every second frame.
> Looking at top as this happens, the cpu usage starts out at about 65% user
> but goes towards 75% user, and about 24% nice. Almost all of my 64 megs of
> memory is in use, and there are 4 vlc processes listed as using 25.1% of
> memory, and that grows to about 29% each.
> I'm playing on an AMD Athlon 750MHz, with a Riva TNT M64, so I would've
> thought this would be adequate to decode fast enough for full screen
> playback, the disc reading certainly isn't at maximum.
Try fiddling with hdparm to speed up the dvd:
c1 -enable 32 bit
a128 -read larger chunks in one row from your dvd drive sequentioally
d1 -enable dma
A1 -enable lookahead read
/sbin/hdparm -c1d1A1a128 /dev/dvd
You might want to use this together with: nice -n vlc --yuv yuv -V sdl
-I gnome
Jean-Paul Saman
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