Mailing List Archive: MythTV: Users

LiveTV on HD channel?

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km at mathcs

Mar 4, 2006, 4:11 PM

Post #1 of 5 (629 views)
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LiveTV on HD channel?

I'm able to get LiveTV to work on the SD channels over firewire. The
image fills the 4x3 screen on my latop. On HD channels I get audio, a
blue screen and an X bad param error on a shared memory segment.

I presume this is because the size and resolution of the HD image.

Do I need to tell Myth to scale the image somehow?

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mtdean at thirdcontact

Mar 4, 2006, 4:27 PM

Post #2 of 5 (594 views)
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Re: LiveTV on HD channel? [In reply to]

On 03/04/2006 07:11 PM, Ken Mandelberg wrote:
> I'm able to get LiveTV to work on the SD channels over firewire. The
> image fills the 4x3 screen on my latop. On HD channels I get audio, a
> blue screen and an X bad param error on a shared memory segment.
>
> I presume this is because the size and resolution of the HD image.
>
> Do I need to tell Myth to scale the image somehow?
>
What's the exact error? If you show the messages in your frontend log,
I could probably say for sure, but my guess is that your video card
cannot handle images of the size required for HD.

Mike
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km at mathcs

Mar 5, 2006, 11:24 AM

Post #3 of 5 (573 views)
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Re: LiveTV on HD channel? [In reply to]

>From: "Michael T. Dean" <mtdean [at] thirdcontact>
>Subject: Re: [mythtv-users] LiveTV on HD channel?
>
>On 03/04/2006 07:11 PM, Ken Mandelberg wrote:
>> > I'm able to get LiveTV to work on the SD channels over firewire. The
>> > image fills the 4x3 screen on my latop. On HD channels I get audio, a
>> > blue screen and an X bad param error on a shared memory segment.
>> >
>> > I presume this is because the size and resolution of the HD image.
>> >
>> > Do I need to tell Myth to scale the image somehow?
>> >
>What's the exact error? If you show the messages in your frontend log,
>I could probably say for sure, but my guess is that your video card
>cannot handle images of the size required for HD.

The exact error is

VideoOutputXv Error: CreateXvShmImages(): XvShmCreateImage() failed to
create image of the requested size.

It's no surprise that it cannot display a 1920x1080 image on a 1024x768
display. Still there should be a way to scale it. Xine manages to do it
on the same hardware.
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adeffs.mythtv at gmail

Mar 5, 2006, 1:37 PM

Post #4 of 5 (577 views)
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Re: LiveTV on HD channel? [In reply to]

On 3/5/06, Ken Mandelberg <km [at] mathcs> wrote:
> >From: "Michael T. Dean" <mtdean [at] thirdcontact>
> >Subject: Re: [mythtv-users] LiveTV on HD channel?
> >
> >On 03/04/2006 07:11 PM, Ken Mandelberg wrote:
> >> > I'm able to get LiveTV to work on the SD channels over firewire. The
> >> > image fills the 4x3 screen on my latop. On HD channels I get audio, a
> >> > blue screen and an X bad param error on a shared memory segment.
> >> >
> >> > I presume this is because the size and resolution of the HD image.
> >> >
> >> > Do I need to tell Myth to scale the image somehow?
> >> >
> >What's the exact error? If you show the messages in your frontend log,
> >I could probably say for sure, but my guess is that your video card
> >cannot handle images of the size required for HD.
>
> The exact error is
>
> VideoOutputXv Error: CreateXvShmImages(): XvShmCreateImage() failed to
> create image of the requested size.
>
> It's no surprise that it cannot display a 1920x1080 image on a 1024x768
> display. Still there should be a way to scale it. Xine manages to do it
> on the same hardware.

I watch 1080i using 720p output.

--
Steve
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mtdean at thirdcontact

Mar 5, 2006, 2:19 PM

Post #5 of 5 (580 views)
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Re: LiveTV on HD channel? [In reply to]

On 03/05/2006 02:24 PM, Ken Mandelberg wrote:

>From: "Michael T. Dean" <mtdean [at] thirdcontact>
>
>>On 03/04/2006 07:11 PM, Ken Mandelberg wrote:
>>
>>>I'm able to get LiveTV to work on the SD channels over firewire. The
>>>image fills the 4x3 screen on my latop. On HD channels I get audio, a
>>>blue screen and an X bad param error on a shared memory segment.
>>>
>>>I presume this is because the size and resolution of the HD image.
>>>
>>>Do I need to tell Myth to scale the image somehow?
>>
>>What's the exact error? If you show the messages in your frontend log,
>>I could probably say for sure, but my guess is that your video card
>>cannot handle images of the size required for HD.
>
>The exact error is
>
>VideoOutputXv Error: CreateXvShmImages(): XvShmCreateImage() failed to
>create image of the requested size.
>
>It's no surprise that it cannot display a 1920x1080 image on a 1024x768
>display. Still there should be a way to scale it. Xine manages to do it
>on the same hardware.
>

As I presumed: http://svn.mythtv.org/trac/ticket/1190

You need a better video card or better video card drivers.

Mike
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