Mailing List Archive: ivtv: users

pvr150 static sound on channel change

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pickle136 at sbcglobal

Nov 23, 2008, 3:51 PM

Post #1 of 7 (3038 views)
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pvr150 static sound on channel change

Hello all, this is my first mailing list posting ever, so if I goof this
sorry.

My problem is with my pvr-150. My problem is with the sound, when i
start recording the sound is fine, but when I change the channel the
sound ends up having static.
My temporary fix was to use "v4l2-ctl --set-sudio-input 0 -d
/dev/video" in a script that can be executed by a button on my remote.
Not very ideal.
Im running the following:
opensuse 11.0
2.6.25.18-0.2
ivtv/firmware 1.0.3 ( Im using the prebuilt rpm's, I dont understand why
these version are used, as that version doesnt match the kernel
versioning on the ivtv page: kernels >= 2.6.22 and <= 2.6.23)
I can post my dmesg, but it looks pretty normal.

Ive tested the card and ivtv with both mythtv and another ivtv tv
frontend player and the problem is the same.
I used to run opensuse 10.3 and it worked fine until I "upgraded" to
11.0, I looked up and the ivtv version is 0.10.3

Im am willing to try to install a newer driver, it looks like I should
be running version 1.2.0 for kernel 2.6.25 anyway. Im willing to try
anything.

Scott

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stichnot at gmail

Nov 23, 2008, 8:06 PM

Post #2 of 7 (2912 views)
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Re: pvr150 static sound on channel change [In reply to]

On Sun, Nov 23, 2008 at 3:51 PM, Scott <pickle136 [at] sbcglobal> wrote:

> My problem is with my pvr-150. My problem is with the sound, when i
> start recording the sound is fine, but when I change the channel the
> sound ends up having static.
> My temporary fix was to use "v4l2-ctl --set-sudio-input 0 -d
> /dev/video" in a script that can be executed by a button on my remote.
> Not very ideal.
>

This sounds like the "tinny audio" problem. Do a search on that and you'll
find plenty of workarounds like yours. The usual approach in mythtv is to
add the command to the channel-changing script so that it is executed
automatically. Maybe you can do something similar with your setup.

Jim

pickle136 at sbcglobal

Nov 24, 2008, 6:45 AM

Post #3 of 7 (2898 views)
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Re: pvr150 static sound on channel change [In reply to]

Yeah ive followed some of the tinny audio episodes as I wasnt sure if i
had the same problem. The only problem I have is that im using the
analog input for cable, not the composite input, which is used for
digital cable packages. As far as I know I thought the channel change
scripts applied to only that setup. The only solution I thought I could
use was to map the command to my lirc setup for my remote, although it
doesnt help if mythtv changes channels on its own.

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pickle136 at sbcglobal

Dec 6, 2008, 3:27 PM

Post #4 of 7 (2801 views)
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Re: pvr150 static sound on channel change [In reply to]

I knew there as the change channel script option for external tuners,
but I never thought to use since I was using the tuning the pvr directly.
Well it finally dawned on me that I could use this option and tune the
pvr150 through ivtv-tune. Heres what I came up with and it works:

#!/bin/sh

for digit in $(echo $1 | sed -e 's/./& /g'); do
ivtv-tune -c $digit
v4l2-ctl --set-audio-input 0 -d /dev/video0
done

I took the for statement from the external tuner script I came across.
Hope this is helpful to someone.

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pickle136 at sbcglobal

Dec 6, 2008, 3:45 PM

Post #5 of 7 (2806 views)
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Re: pvr150 static sound on channel change [In reply to]

The previous script I sent didnt work right with double digit channels
as it was sending each digit by itself (should have noticed that, must
have been too excited that the tinny sound was gone). Anyway this script
does work:

#!/bin/sh

ivtv-tune -c $1
v4l2-ctl --set-audio-input 0 -d /dev/video0

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markfkaufman at yahoo

Dec 7, 2008, 4:57 AM

Post #6 of 7 (2793 views)
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Re: pvr150 static sound on channel change [In reply to]

Here are a couple of the ones I use.

#! /bin/bash

ivtv-tune -c 3 -d /dev/video0
mplayer -vo xv -vf spp,scale -ao alsa -autosync 30 /dev/video0

my alternate, for when I want to record or stream

#! /bin/bash
vlc pvr:// :pvr-device="/dev/video0" :pvr-radio-device="/dev/radio0" :pvr-norm=0 :pvr-frequency=-1 :pvr-bitrate=-1

----- Original Message ----
From: Scott <pickle136 [at] sbcglobal>
To: ivtv-users [at] ivtvdriver
Sent: Saturday, December 6, 2008 6:45:20 PM
Subject: Re: [ivtv-users] pvr150 static sound on channel change

The previous script I sent didnt work right with double digit channels
as it was sending each digit by itself (should have noticed that, must
have been too excited that the tinny sound was gone). Anyway this script
does work:

#!/bin/sh

ivtv-tune -c $1
v4l2-ctl --set-audio-input 0 -d /dev/video0

_______________________________________________
ivtv-users mailing list
ivtv-users [at] ivtvdriver
http://ivtvdriver.org/mailman/listinfo/ivtv-users

_______________________________________________
ivtv-users mailing list
ivtv-users [at] ivtvdriver
http://ivtvdriver.org/mailman/listinfo/ivtv-users

markfkaufman at yahoo

Dec 7, 2008, 5:03 AM

Post #7 of 7 (2792 views)
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Re: pvr150 static sound on channel change [In reply to]

Scott, I use the tv remote to change channels on my box, as the input source is constant channel 3 from the box

#! /bin/bash

ivtv-tune -c 3 -d /dev/video0
mplayer -vo xv -vf spp,scale -ao alsa -autosync 30 /dev/video0

This is why I fix the channel at 3, it is a constant, the box interprets the digital info from the cable provider. I also have a Hauppauge PVR-150, I use the vlc script when I want to record or stream.

Thank you,

Mark F. Kaufman

----- Original Message ----
From: Scott <pickle136 [at] sbcglobal>
To: ivtv-users [at] ivtvdriver
Sent: Saturday, December 6, 2008 6:45:20 PM
Subject: Re: [ivtv-users] pvr150 static sound on channel change

The previous script I sent didnt work right with double digit channels
as it was sending each digit by itself (should have noticed that, must
have been too excited that the tinny sound was gone). Anyway this script
does work:

#!/bin/sh

ivtv-tune -c $1
v4l2-ctl --set-audio-input 0 -d /dev/video0

_______________________________________________
ivtv-users mailing list
ivtv-users [at] ivtvdriver
http://ivtvdriver.org/mailman/listinfo/ivtv-users

_______________________________________________
ivtv-users mailing list
ivtv-users [at] ivtvdriver
http://ivtvdriver.org/mailman/listinfo/ivtv-users

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