Mailing List Archive: MythTV, minor sound issue, major video issue

MythTV, minor sound issue, major video issue

Jul 17, 2003, 8:05 AM

Post #1 of 7 (1673 views)

I'm running MythTV from CVS with a PVR 250 card and on an nForce2 motherboard
(Shuttle SN45G with nForce2 sound and net) and have noticed a couple of
issues. I've been waiting a week to see if these were solved by upgrading
from the live CVS tree, but so far no sigar.

1. Sound issue

When MythTV starts up and I go in and watch live tv, sound is not enabled.
Simply switching channel seems to activate sound, but I would guess it should
be on by default. The only clue I have found about sound from the backend is
this message:

WARNING: Capture device /dev/dsp is not reporting full duplex capability

Does not sound too serious, and as said I have no problem with sound after
switching channel.

2. Video issue

Watching live tv works great, even pause/unpause livetv. However, all
recordings that have been scheduled from the program guide seems to be blank
(includig no sound). When I try to play recordings, the screen briefly
flashes blue and then shows all black. I've tried various recordings on
various channels but they all fail. I have no problem watching live tv - only
the recordings fail. I have found no indications in the output from the
backend that it is having problems recording, and apart from the missing
sound and video, it actually stores a recording (all black, no sound).

Any hints would be appreciated.

Marius K.

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Re: MythTV, minor sound issue, major video issue [ In reply to ]

csiwiec at ftdi

Jul 17, 2003, 9:11 AM

Post #2 of 7 (1660 views)

Permalink

The sound problem I have resently see too. ( i also have a PVR 250 Havent
had time to look at.

the video problem on the other hand could be our record profiles. Default,
livetv, and transcode
are they set for hardware MPEG?

I am not sure but it is something to check

----- Original Message -----
From: "Marius Kjeldahl" <marius@kjeldahl.net>
To: <mythtv-users@snowman.net>
Sent: Thursday, July 17, 2003 10:05 AM
Subject: [mythtv-users] MythTV, minor sound issue, major video issue

> I'm running MythTV from CVS with a PVR 250 card and on an nForce2
motherboard
> (Shuttle SN45G with nForce2 sound and net) and have noticed a couple of
> issues. I've been waiting a week to see if these were solved by upgrading
> from the live CVS tree, but so far no sigar.
>
> 1. Sound issue
>
> When MythTV starts up and I go in and watch live tv, sound is not enabled.
> Simply switching channel seems to activate sound, but I would guess it
should
> be on by default. The only clue I have found about sound from the backend
is
> this message:
>
> WARNING: Capture device /dev/dsp is not reporting full duplex capability
>
> Does not sound too serious, and as said I have no problem with sound after
> switching channel.
>
> 2. Video issue
>
> Watching live tv works great, even pause/unpause livetv. However, all
> recordings that have been scheduled from the program guide seems to be
blank
> (includig no sound). When I try to play recordings, the screen briefly
> flashes blue and then shows all black. I've tried various recordings on
> various channels but they all fail. I have no problem watching live tv -
only
> the recordings fail. I have found no indications in the output from the
> backend that it is having problems recording, and apart from the missing
> sound and video, it actually stores a recording (all black, no sound).
>
> Any hints would be appreciated.
>
> Marius K.
>
> _______________________________________________
> mythtv-users mailing list
> mythtv-users@snowman.net
> http://lists.snowman.net/cgi-bin/mailman/listinfo/mythtv-users

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Re: MythTV, minor sound issue, major video issue [ In reply to ]

ijr at po

Jul 17, 2003, 9:35 AM

Post #3 of 7 (1653 views)

Permalink

On Thursday 17 July 2003 11:05 am, Marius Kjeldahl wrote:
> I'm running MythTV from CVS with a PVR 250 card and on an nForce2
> motherboard (Shuttle SN45G with nForce2 sound and net) and have noticed a
> couple of issues. I've been waiting a week to see if these were solved by
> upgrading from the live CVS tree, but so far no sigar.
>
> 1. Sound issue
>
> When MythTV starts up and I go in and watch live tv, sound is not enabled.
> Simply switching channel seems to activate sound, but I would guess it
> should be on by default. The only clue I have found about sound from the
> backend is this message:

That's an ivtv driver issue, bring it up on their mailing list.

> WARNING: Capture device /dev/dsp is not reporting full duplex capability
>
> Does not sound too serious, and as said I have no problem with sound after
> switching channel.

It's not serious, as you're not using the soundcard to record with.

> 2. Video issue
>
> Watching live tv works great, even pause/unpause livetv. However, all
> recordings that have been scheduled from the program guide seems to be
> blank (includig no sound). When I try to play recordings, the screen
> briefly flashes blue and then shows all black. I've tried various
> recordings on various channels but they all fail. I have no problem
> watching live tv - only the recordings fail. I have found no indications in
> the output from the backend that it is having problems recording, and apart
> from the missing sound and video, it actually stores a recording (all
> black, no sound).

Sounds like you may have set up a input on the card other than the tuner (or
the input you want) with the same mapping -- ie, some people have wrongly
told every single input on the card (in the 4th section of setup) to be
connected to the same video source. When it goes to live-tv, it uses the
default input (generally the tuner), but when it goes to record, it picks the
first input that's mapped to that channel, and you get a blank recording.

Isaac
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Re: MythTV, minor sound issue, major video issue [ In reply to ]

ijr at po

Jul 17, 2003, 9:36 AM

Post #4 of 7 (1655 views)

Permalink

On Thursday 17 July 2003 12:11 pm, Chris Siwiec wrote:
> the video problem on the other hand could be our record profiles. Default,
> livetv, and transcode
> are they set for hardware MPEG?

No, this couldn't be it. It ignores all those settings aside from resolution.

Isaac
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Re: MythTV, minor sound issue, major video issue [ In reply to ]

marius at kjeldahl

Jul 18, 2003, 4:28 AM

Post #5 of 7 (1638 views)

Permalink

On Thursday 17 July 2003 18:35, Isaac Richards wrote:
> On Thursday 17 July 2003 11:05 am, Marius Kjeldahl wrote:
> > 1. Sound issue
> >
> > When MythTV starts up and I go in and watch live tv, sound is not
> > enabled. Simply switching channel seems to activate sound, but I would
> > guess it should be on by default. The only clue I have found about sound
> > from the backend is this message:
>
> That's an ivtv driver issue, bring it up on their mailing list.

I tried, but the ivtv list does not like the fact that I am on a variable IP
(even though my domain name is fixed), so until they relax their requirements
or I get an emal account on a "permanent" server, I can not join the lists
there.

> > 2. Video issue
> >
> > Watching live tv works great, even pause/unpause livetv. However, all
> > recordings that have been scheduled from the program guide seems to be
> > blank (includig no sound). When I try to play recordings, the screen
> > briefly flashes blue and then shows all black. I've tried various
> > recordings on various channels but they all fail. I have no problem
> > watching live tv - only the recordings fail. I have found no indications
> > in the output from the backend that it is having problems recording, and
> > apart from the missing sound and video, it actually stores a recording
> > (all black, no sound).
>
> Sounds like you may have set up a input on the card other than the tuner
> (or the input you want) with the same mapping -- ie, some people have
> wrongly told every single input on the card (in the 4th section of setup)
> to be connected to the same video source. When it goes to live-tv, it uses
> the default input (generally the tuner), but when it goes to record, it
> picks the first input that's mapped to that channel, and you get a blank
> recording.

This was exactly what was happening. By default, MythTV set up both Composite
0 and Tuner 0 to my default feed. Using MythTV, I had told it to use Tuner 0,
but recording still defaulted to Composite 0 like you described. I ran setup
and removed the Composite 0 mapping, and it works like a charm now.

In short, everything works fine now, but recordings are a bit low quality. As
soon as the PAL issues with the ivtv driver are solved or I figure out how to
tweak my Athlon XP 2800 nForce2 system to be able to capture 576x576 without
missing frames, recording quality should improve.

Thanks for the help.

Marius K.

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Re: MythTV, minor sound issue, major video issue [ In reply to ]

ijr at po

Jul 18, 2003, 7:43 AM

Post #6 of 7 (1651 views)

Permalink

On Friday 18 July 2003 07:28 am, Marius Kjeldahl wrote:
> This was exactly what was happening. By default, MythTV set up both
> Composite 0 and Tuner 0 to my default feed. Using MythTV, I had told it to
> use Tuner 0, but recording still defaulted to Composite 0 like you
> described. I ran setup and removed the Composite 0 mapping, and it works
> like a charm now.

It did not set up _anything_ for you. You told it wrong.

Isaac
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Re: MythTV, minor sound issue, major video issue [ In reply to ]

marius at kjeldahl

Jul 18, 2003, 12:05 PM

Post #7 of 7 (1666 views)

Permalink

On Friday 18 July 2003 16:43, Isaac Richards wrote:
> On Friday 18 July 2003 07:28 am, Marius Kjeldahl wrote:
> > This was exactly what was happening. By default, MythTV set up both
> > Composite 0 and Tuner 0 to my default feed. Using MythTV, I had told it
> > to use Tuner 0, but recording still defaulted to Composite 0 like you
> > described. I ran setup and removed the Composite 0 mapping, and it works
> > like a charm now.
>
> It did not set up _anything_ for you. You told it wrong.

I'm not trying to push the blame here, just completing the information so that
others might benefit. Thanks for helping out.

Marius K.

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