[mythtv] "vidiocgcap" error on a new MyhTv installation

[Martin Møller]

----- Original Message -----
From: Frank Hui <frankhui at linuxide.org>
To: martin at martinm-76.dk
Sent: 4. september 2006 08:21:49 GMT+0100
Subject: Re: [mythtv] "vidiocgcap" error on a new MyhTv installation

Martin Møller wrote:
> See below.
>
> ----- Original Message -----
> From: Frank Hui <frankhui at linuxide.org>
> To: martin at martinm-76.dk
> Cc: Development of mythtv <mythtv-dev at mythtv.org>
> Sent: 4. september 2006 01:40:39 GMT+0100
> Subject: Re: [mythtv] "vidiocgcap" error on a new MyhTv installation
>
> Martin
>
>   
>> ----- Original Message -----
>> From: Frank Hui <frankhui at linuxide.org>
>> To: mythtv-dev at mythtv.org
>> Sent: 3. september 2006 10:34:20 GMT+0100
>> Subject: [mythtv] "vidiocgcap" error on a new MyhTv installation
>>
>> MythTV Version : 1.91 (12-Feb-2006)
>> Error:                    vidiocgcap:: invalid argument
>> TV-Capture Card:  KWorld Terminator (SAA7134 driver)
>>
>>
>> I am getting a "vidiocgcap" error on a new MyhTv installation (0.19),
>> when attempting to watch live TV. Watching live TV using TV-Time and
>> KDE-TV works without any problems.
>> [....]
>>
>> 2006-08-21 17:03:23.205 Channel(/dev/video0):
>> InitPictureAttribute(       hue):
>> VIDIOCGMBUF:: Invalid argument
>>
>> Any help and pointers would be appreciated. 
>> thx
>> frank
>>
>> Hey Frank.
>>
>> Could you look at your loaded kernel-modules and check if v4l1-compat is listed? I'm almost 100% sure that it is not. MythTV needs v4l1-compat to use SAA7134 cards while MPlayer and KwinTV for example do not.
>>   
>>     
>
> It's loaded,
>
> saa7134               159592  0
> compat_ioctl32         41600  1 saa7134
> ir_kbd_i2c             42512  1 saa7134
> ir_common              63620  2 saa7134,ir_kbd_i2c
> videodev               57728  1 saa7134
> v4l1_compat            44420  2 saa7134,videodev
> v4l2_common            56832  3 saa7134,compat_ioctl32,videodev
> video_buf              59268  1 saa7134
>
>
>
>   
>> If v4l1-compat is not included in your distribution at all, you're probably best off fetching the latest tarball from the linuxtv.org git tree.
>>
>>   
>>     
> I compiled V4l from the source.
>
> thx frank
>   
>> /Martin.
>>
>>     
>
> Okay... Are you running a 64-bit operating system? Is mythtv 32-bit? If so that could also do it. If not, I'm out of ideas.
>   
Good point. I am running FC5 64 bit. What's the issue with running the
32bit version of myth on FC5 64 bit??? The usual lib issues ? And if so
which once are causing the trouble?

thx frank
> /Martin.   
>

The 32-bit MythTV doesn't interface well with the 64-bit kernel module.
Actually none of the usual videorecorders (mencoder/mplayer/ffmpeg) seems to.
I'm guessing it's too low-level access for 32-bit code to be allowed or something...

You need 64-bit Myth on 64-bit operating systems.

This one bit me too a few months back.

/Martin.