[mythtv-users] LiveTV jitters every 60 seconds...
Albert Santoni
GameGod at sympatico.ca
Tue Jul 8 13:11:30 EDT 2003
Hello,
I've been trying to track down this problem for a while, but I haven't
gotten anywhere.
About every minute or so, the audio will cut out and the video will freeze
for a second. Then it will resume normal playing. If I pause the LiveTV for
a couple seconds, and resume it, it'll never go choppy again.
Why do I have to do this to watch LiveTV?
Here's my hdparm -Tt scores:
/dev/hdb:
Timing buffer-cache reads: 128 MB in 0.48 seconds =265.34 MB/sec
Timing buffered disk reads: 64 MB in 3.29 seconds = 19.48 MB/sec
/dev/hda:
Timing buffer-cache reads: 128 MB in 0.48 seconds =265.34 MB/sec
Timing buffered disk reads: 64 MB in 3.28 seconds = 19.52 MB/sec
These are identical harddrives.
It should also be noted that if I watch a program while it is being
recorded, it will run smoothly.
Another note, my LiveTV buffer is on one drive, and my recordings go on the
other.
Here's the hdparm -i info:
Model=QUANTUM FIREBALLP KA18.2, FwRev=A42.0400, SerialNo=361909032241
Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs }
RawCHS=16383/16/63, TrkSize=32256, SectSize=21298, ECCbytes=4
BuffType=DualPortCache, BuffSize=371kB, MaxMultSect=16, MultSect=16
CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=36094464
IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
PIO modes: pio0 pio1 pio2 pio3 pio4
DMA modes: mdma0 mdma1 mdma2
UDMA modes: udma0 udma1 udma2
AdvancedPM=no WriteCache=enabled
Drive conforms to: ATA/ATAPI-4 T13 1153D revision 15: 1 2 3 4
Now, if you look REALLY hard up there, you'll notice something odd.
"BuffSize=371kB"
Is my tiny drive buffer causing these hiccups?
I had a similar choppiness on my old rig, where I used the same
hard-drives...
Could this be the cause?
Thanks.
Albert
More information about the mythtv-users
mailing list