[mythtv-users] stuttering and staggering recordings
WagnerOne
wagner at wagnerone.com
Mon Feb 11 18:58:11 UTC 2008
My mythtv box is a single front/back end on a Ubuntu 7.10 system. All
my myth packages are listed as version 0.20.2-0ubuntu10.1.
Linux tatooine 2.6.22-14-generic #1 SMP Tue Dec 18 08:02:57 UTC 2007
i686 GNU/Linux
I'm using the motherboard audio hardware:
00:1f.5 Multimedia audio controller: Intel Corporation 82801EB/ER
(ICH5/ICH5R) AC'97 Audio Controller (rev 02)
and a single pcHDTV HD-5500 for my capture device.
At the present, I have my analog coax cable plugged into the coax
input on the HD-5500 and am using it to record analog SD TV only.
About 1/10 of the time I record a program or view live TV, the video
and audio streams stuttering to the point the viewing/recording is
pointless. The video and audio stuttering seems to be in sync FWIW.
If this happens when attempting to view live TV, exiting and
immediately going to live TV again will correct the problem. Of
course, if it happens while recording, I just have to hope the program
will be on again for a 2nd recording attempt.
I've spent a good deal of time troubleshooting this issue and have
made no progress. I've researched ALSA, VFL and DVB drivers, searched
the web for the errors I see in the system logs when this happens, and
physically moved the HD-5500 to another PCI slot for kicks... all to
no avail.
At this point I'm pretty convinced I have an ALSA driver issue related
to either the on-board audio hardware or the HD-5500, a V4L/DVB driver
problem with the HD-5500 itself or configuration issue within Mythtv.
The one thing I'll throw in here before I ask for what details I can
provide to best troubleshoot is the output to my syslog when this
stuttering thing happens:
1 Time(s): [174280.617511] cx88[0]: irq aud [0x1001] dn_risci1* dn_sync*
1 Time(s): [174280.636123] cx88[0]: irq aud [0x1101] dn_risci1* dnf_of
dn_sync*
1 Time(s): [177267.170212] cx88[0]: irq aud [0x201001] dn_risci1*
dn_sync* mchg_irq
1 Time(s): [177267.170234] cx88[0]: irq aud [0x1001] dn_risci1* dn_sync*
1 Time(s): [177267.170249] cx88[0]: irq aud [0x1001] dn_risci1* dn_sync*
1 Time(s): [177267.170262] cx88[0]: irq aud [0x1001] dn_risci1* dn_sync*
1 Time(s): [177267.170273] cx88[0]: irq aud [0x1001] dn_risci1* dn_sync*
1 Time(s): [177267.170287] cx88[0]: irq aud [0x1001] dn_risci1* dn_sync*
1 Time(s): [177267.170299] cx88[0]: irq aud [0x1001] dn_risci1* dn_sync*
1 Time(s): [177267.170312] cx88[0]: irq aud [0x1001] dn_risci1* dn_sync*
1 Time(s): [177267.170326] cx88[0]: irq aud [0x1001] dn_risci1* dn_sync*
1 Time(s): [177267.170343] cx88[0]: irq aud [0x1001] dn_risci1* dn_sync*
1 Time(s): [177267.170352] cx88[0]/1: clearing mask
1 Time(s): [177267.236356] cx88[0]: irq aud [0x1001] dn_risci1* dn_sync*
1 Time(s): [177274.475260] cx88[0]: irq aud [0x1001] dn_risci1* dn_sync*
Thanks,
Mike
--
wagner at wagnerone.com
"The advantage of a bad memory is that one enjoys several times the
same good things for the first time."-Nietzsche
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