[mythtv-users] HD-PVR and SPDIF out sound

John Nissley jnissley at nissley.org
Tue Apr 6 20:39:56 UTC 2010


John Nissley wrote:
> On Tue, Apr 6, 2010 at 1:47 PM, John Nissley <jnissley at nissley.org 
> <http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users>> wrote:
>> / I am running trunk 23994 and just got the output of the audio from 
>> my F/E to
> />/ be SPDIF so now I am trying to make sure I have the best sound 
> available
> />/ from my capture devices.
> />/
> />/ I have had the HD-PVR running well for at least six months with 
> composite
> />/ input and the stereo plugs for sound.  I tried to switch to the SPDIF
> />/ connector for sound and made the changes required in the backend 
> to look at
> />/ the SPDIF for sound.
> />/
> />/ My problem is that when the HD-PVR is used I sometimes get sound and
> />/ sometimes I do not get sound.  When I switch back to the stereo 
> input the
> />/ sound works all the time.  I have a time warner stb for the HD 
> content.
> />/
> />/ Does anyone have any suggestions for what I can look at to make 
> SPDIF audio
> />/ work reliably?
> />/
> />/ Thanks
> />/
> />/
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> /
> I can't seem to find the thread right now, but this has been addressed
> before.  You need to make sure that you set the HD-PVR for the correct
> audio input through v4l2-ctl.  Assuming your HD-PVR is on /dev/video0,
> first type v4l2-ctl --device=/dev/video0 -l to get a list of the
> current settings.  If I remember correctly the "audio_encoding" needs
> to be set to (I believe) 4, but I could be remembering incorrectly,
> and I can't get to my box right now.
>
> A search of the archives for "HD-PVR" and "v4l2-ctl" might get you the 
> answer.
>
> George
>
> ----------------------------------------------------------------------------------- 
>
>
> Thank you for the response.  I was reading something about that but am 
> not able
> to find v4l2-ctl on my system anywhere.  I could not seem to find out 
> how to install
> it either.  I know that HD-PVR drivers exist now and do not need to be 
> compiled in
> and I was trying to do a yum-install v4l12-ctl* and could not find 
> anything.
>
>
> How would I get the v4l2-ctl program installed on my Fedora back end?
>
>
----------------------------------------------------------------------------------------------
Found it.  I had to install the ivtv-utils.  That seems to be missing in 
the docs I was looking at.


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