[mythtv-users] Occasional missing audio from recordings
Philippe C.Cattin
cattin at vision.ee.ethz.ch
Wed Dec 3 11:48:51 EST 2003
Whenever I see this 'no sound' behaviour I can always cure it with the
following command:
test_ioctl -v input=7,output=1
It even works while watching live tv. I just fire-off the above command
in a shell. It seems as if the MSP_MATRIX gets hosed from time to time.
Notice, that I'm in a PAL country so your input number might be different.
Philippe
> Same problem here. I have to restart the ivtv module as well.
> I've had it once running the ivtv driver for several hours before
> starting up the backend drivers.. or not having plugged in my coaxial
> cable before loading the driver.
>
> Latest issue I had it with was sound going all b0rked when recording
> channel Veronica from 20:30-22:15 and then Net5 from 22:15-22:45 ... I
> think it didn't like to switch recordings/channels that fast with it's
> recordingschedule? I had to reload the driver again.
>
>
> Jelle.
>
> ------------------------------------------------------------------------
> *From:* mythtv-users-bounces at mythtv.org
> [mailto:mythtv-users-bounces at mythtv.org] *On Behalf Of *Tako Schotanus
> *Sent:* woensdag 3 december 2003 16:21
> *To:* Discussion about mythtv
> *Subject:* Re: [mythtv-users] Occasional missing audio from recordings
>
>
> jose rubio wrote:
>
>>On Tue, 2003-12-02 at 20:44, Doug Scoular wrote:
>>
>>
>>>Hi All,
>>> I have a Shuttle SB61G2 with a Hauppauge PVR-350 and
>>> NVidia GeForce 4 440MX for TV-out. I'm using gentoo 1.4
>>> with a 2.4.21 kernel and the latest IVTV drivers/firmware
>>> and MythTV 0.12.
>>>
>>> MythTV works wonderfully well on the above setup with
>>> one remaining issue.
>>>
>>> Occasionally I get no audio on a scheduled recording. This
>>> has been the case on MythTV 0.11 and 0.12. Most of
>>> the time the loss of audio on a scheduled recording causes
>>> live TV to also lose audio, however this is not always the
>>> case. Sometimes the loss of audio is limited to the
>>> one scheduled recording, subsequent recordings being
>>> fine and live tv unaffected.
>>>
>>> If I lose audio on live tv I can fix it by killing mythbackend
>>> and restarting it. This always fixes the problem... which indicates
>>> that the IVTV driver has no problem re-initialising.
>>>
>>> I had thought this might be due to some KDE app holding
>>> open the dsp device but I've disabled all arts binaries
>>> by making them non-executable. I've also tried running
>>> under twm, but all to no avail. There's nothing in the
>>> mythbackend logs to indicate a problem.
>>>
>>> I haven't seen anyone else mention this problem on the
>>> list so I'm stumped.
>>>
>>> I do get about less than a second of white noise at
>>> the start of playback on these "no audio" recordings.
>>>
>>> Any ideas much appreciated...
>>>
>>> Doug
>>>
>>>
>>
>>It happens, although I've never seen it happen during live tv. I
>>believe it's an ivtv problem, just waiting for the newest driver to come
>>out and see if that fixes it.
>>
>>
>>-jose-
>>
>
> Restarting the backend doesn't do it for me, I have to do a "modprobe -r
> ivtv/modprobe ivtv" before I get my sound back.
> But I agree with jose that it is most likely an ivtv problem, they've
> been very busy lately and there are several known problems with the
> current version in CVS.
>
> -Tako
>
>
> ------------------------------------------------------------------------
>
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--
Dr. Philippe C. Cattin cattin at vision.ee.ethz.ch
Swiss Federal Institute of Technology, ETHZ Tel: +41-1-632 25 29
Computer Vision Laboratory, CH-8092 Zuerich Fax: +41-1-632 11 99
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