[mythtv-users] PVR500 and recent mythtv-backend versions

[James Warden]

I uploaded some small mpg files in rapidshare.com:

http://rapidshare.com/files/228206418/mpeg_dump.tar.html

MD5: AA1A5C51B6991CA9F166BBD0022EDC5B 

it's a tar file containing two mpgs (tar xvf mpeg_dump.tar to untar it)
- clean.mpg
- scrambled.mpg

clean.mpg is a dump of /dev/video0 after modprobing ivtv
scrambled is a piece of liveTV generated by mythbackend.

Cheers!
J.



--- On Sat, 5/2/09, James Warden <warjamy at yahoo.com> wrote:

> From: James Warden <warjamy at yahoo.com>
> Subject: [mythtv-users] PVR500 and recent mythtv-backend versions
> To: mythtv-users at mythtv.org
> Date: Saturday, May 2, 2009, 5:12 AM
> Hello,
> 
> I've been using mythtv for a long while now on a home
> network. The server is debian based, contains a PVR500 card
> (not the newer ones with digital chips, only the good
> ol' analog tuners). Clients are linux or windows based.
> 
> Anyway, I recently upgraded the server to kernel
> 2.6.29.1-1-686 from debian. It contains ivtv version 1.4.0.
> 
> I checked the driver was working well by the trivial
> 'cat' test:
> cat /dev/video0 > file.mpg and played the mpg file with
> mplayer or others
> same with /dev/video1
> 
> So far so good. I also upgraded the mythbackend to what
> debian multimedia is providing : 0.21.svn20090430-0.0
> 
> After this upgrade, all my frontend clients are showing a
> quite scrambled picture. I can still see what it is about
> but it is noisy, as if someone was detuning the channel
> frequency on purpose and randomly.
> 
> When I do a /dev/videoX dump afyer that, I get a screwed
> mpg file. Only an rmmod ivtv followed by modprobe ivtv will
> fix it. But starting the backend again will screw it up once
> more.
> 
> I tried the SVN code as well, the QT4 port. It compiled
> fine and ran fine but with the same image symptom. It is not
> the first time I see this in all these years, using the
> PVR500 with the debian mythtv-backend package. Usually, I
> just compiled the SVN code and things were fine again but
> not this time. I believe recent mythbackend updates must
> screw something with the PVR500. This is not an ivtv issue
> as a fresh modprobe and /dev/videoX dump will produce a
> clean image.
> 
> Anyone with something similar ? If not, I'll provide
> more technical details.
> 
> 
>       
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