[mythtv-users] "Error getting codec params"... "IVTV_IOC_G_CODEC:: Invalid argument"

[Dean Wilson]

I just reconfigured my mythbox, and am having the same problem.
Here's my setup:

AMD X2 4200+ running 64-bit linux
Fedora Core 5 with 2.6.17-1.2139_FC5 kernel
SVN release-0-19-fixes (as of 7/7/06)

First attempt was with ivtv rpm modules:

[root at hercules bleeding]# rpm -qa | grep -i ivtv
ivtv-firmware-enc-2.04.024-9.at
perl-Video-ivtv-0.13-7.rhfc5.at
ivtv-firmware-dec-2.02.023-9.at
ivtv-0.8-116.rhfc5.at
ivtv-kmdl-2.6.17-1.2139_FC5-0.8-116.rhfc5.at
ivtv-firmware-audio-0.0.1-5.at

Second attempt was with ivtv svn 0.7.

In both cases, I can watch tv by doing 'cat /dev/video0 >
/tmp/test.mpg', and watching it with 'mplayer -vo xv /tmp/test.mpg'
with no problems.  However, when I try to watch in myth, I get the
following error:

2006-07-08 18:03:23.884 TVRec(3): Changing from None to WatchingLiveTV
Error getting codec params
IVTV_IOC_G_CODEC:: Invalid argument
2006-07-08 18:03:51.085 TVRec(3): Changing from WatchingLiveTV to None

I deleted and re-added my capture cards, with no success.

Suggestions?
~Dean


On 6/28/06, George Nychis <gnychis at cmu.edu> wrote:
> Hey guys,
>
> I'm having problems starting mythtv and live tv, i'm not sure if this is
> an IVTV problem or a MythTV problem, whether it be a setup problem or a
> bug I'm not sure.
>
> I have a 2.6.17-rc6 kernel and a WinTV-PVR 150 card, here is its lspci
> output:
> 03:05.0 Multimedia video controller: Internext Compression Inc iTVC16
> (CX23416) MPEG-2 Encoder (rev 01)
>         Subsystem: Hauppauge computer works Inc. WinTV PVR 150
>         Flags: bus master, medium devsel, latency 64, IRQ 20
>         Memory at e8000000 (32-bit, prefetchable) [size=64M]
>         Capabilities: [44] Power Management version 2
>
> I am using the latest subversion entry of IVTV as of yesterday, and
> MythTV-0.19_p10281 from Gentoo's portage.
>
> On my computer, I can successfully capture and playback video and audio via:
> cat /dev/v4l/video0 > test.mpg
>
> However when I try to start mythtv and watch livetv, i see this:
> 2006-06-28 03:15:43.017 RingBuf(/mnt/store/1027_20060628031541.mpg):
> Invalid file (fd 15) when opening '/mnt/store/1027_20060628031541.mpg'.
> 12 retries remaining.
>
> It retries the 12 times and then quits.  I check my backend log and i
> see this:
> Error getting codec params
> IVTV_IOC_G_CODEC:: Invalid argument
>
> Note that I am *not* using NFS, the backend and frontend are on the same
> machine.  Also note that while i can successfully record/playback with
> cat /dev/v4l/video0 > test.mpg ... the file IS successfully created in
> /mnt/store, and when it quits the file is left there, and i *cannot*
> play this file back.
>
> I'd greatly appreciate any help / suggestions.
>
> Thanks!
> George
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