Re: [mythtv-users] Audio echo/stutter

[Brad Benson]

I've been having this exact same problem.  I had been using ivtv version 0.3.6w successfully for some time with a PVR-350 and a PVR-500.  I could only get one tuner working on the PVR-500 and finally figured out that it was bad hardware.  Hauppauge replaced the 500 for me and sometime relatively shortly after replacing that card 0.3.6w stopped working for me.  I don't recall now exactly what the problem was that started occurring, but I ended up upgrading to 0.3.8.  I've seen the exact problem you describe below with 0.3.8, 0.3.9 (various svn revisions including at least 2745 and 2738), as well as 0.3.7 and various 0.3.7x (x = a-z) releases.  I've also tried reverting to 0.3.6w which used to work, but now when I use 0.3.6w I get zero-byte files from the second tuner of the PVR-500.  I searched both the mailing list and google and the best I could come up with was some info on the IOBOUND error messages that implied there may be some sort of network problem as my video storage is mounted via NFS.  My NFS server is a PII 266 so I thought that maybe it doesn't have enough horsepower to do everything it needs to do.  The thing that seems odd is that that file server hasn't never been a problem before and it's been serving the video storage partition for close to a year before this problem started.  The file server is connected to the backend via 10/100 ethernet so it shouldn't be a bandwidth problem that's causing this.  I've still using a cvs version of myth from several months after 0.18.1 was released.  Haven't tried a new SVN version yet since I was thinking that my problem was ivtv related and not myth.  I also saw some list traffic regarding problems with auto-expire in the latest SVN so I'm hesitant to upgrade until that gets worked out.

Anyone else seeing similar problems or have any idea what the problem might be?

On 10/7/05, Dean <[EMAIL PROTECTED]> wrote:

Hi Users,

I just upgraded from ivtv-0.3.3 to 0.3.8 and am getting an annoying echo in the
audio of recorded programs.  I can not track it down, but it *seems* to come
from MythTV.

I have a master backend with two pvr-500s and a frontened with an additional
500 for a total of 6 tuners.  So this isn't an issue with line-in echo.

I extracted a short clip of the audio.  You can listen here:
http://pics.deanandadie.net/choppy.mp2   [238K]

You can find my system logs at:
http://pics.deanandadie.net/ivtv.probe

Backend logs during recording of an echo-y program:
http://pics.deanandadie.net/recording
Nothing much here.

Some things I noticed.

o The chop usually comes in about 20-30 minutes into a recording.
o System load appears to have no effect - happened recording a single show this
  morning.
o I did a simultaneous cat /dev/v4l/videoN of all my tuners for an hour and
  found no stutter.  Captures directly from the v4l device contain no echo.
o The tuner does not seem to make a difference.
o The echo does not happen all the time.
o Sometimes I get "IOBOUND" messages, but it doesn't happen every time.  (See
the recording messages above.)
2005-10-06 18:35:58.420 IOBOUND - blocking in ThreadedFileWriter::Write()
2005-10-06 18:36:03.208 IOBOUND - blocking in ThreadedFileWriter::Write()

I'm a little lost here.  Everything was working great on the previous drivers.
Any suggestions?

Thanks,
--Dean - Unscrambler of eggs
--
Take your time, take your chances
[3278.7 km, 273.4] Apparent Rennerian
------------------------------------------------------------------------------
It matters not how strait the gate / How charged with punishment the scroll
I am the master of my fate / I am the captain of my soul.    -- Invictus --
                                                        -- William E Henley --
_______________________________________________
mythtv-users mailing list
mythtv-users@mythtv.org
http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users

_______________________________________________
mythtv-users mailing list
mythtv-users@mythtv.org
http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users