[linux-dvb] RFC: DVB patch for Inkling's pchdtvr

Steve Malenfant smalenfant at gmail.com
Mon Aug 29 15:20:51 CEST 2005


Seeing that I don't have the issue with the higher bandwith DVB-C card, 
somethin is obviously wrong with the pchdtv driver or conflicting interrupt 
on my system.
 Because the driver is failry new, I would blame the driver first :)
 Who supports the DVB driver, is it linuxtv.org <http://linuxtv.org> or 
pchdtv?
 Steve
 On 8/28/05, Peter Knaggs <peter.knaggs at gmail.com> wrote: 
> 
> Hi Steve,
> 
> Thanks for your reply.
> I'm not familiar with dvbsnoop,
> sounds useful I'll have to give it a try.
> There's even a Debian package for it,
> what do you know :)
> 
> > I get this only with pcdhtv HD-3000 card and
> > not with my DVB-C card. There is
> > something wrong with buffer management or
> > interrupt in the cx88xx driver.
> 
> I'm using 2.6.12.3 <http://2.6.12.3> here with the HD3000 and it
> captures OK from OTA 8VSB ATSC, I don't have cable.
> At least it captures always OK using the dvb-apps.
> I'm still learning the DVB API to get pchdtv to
> work correctly, hence my questions on the list.
> 
> The interrupt troubles you're having sound similar
> to those in this post:
> http://www.pchdtv.com/forum/viewtopic.php?t=933
> 
> > I'm no expert so I'm pulling this out of you know where...
> 
> Eh, me neither. I think I might have goofed up
> the demux part of my patch. It might be that setting
> DMX_IMMEDIATE_START like I've done, causes the
> demux buffer to start filling, and instead I should
> do a DMX_START ioctl just before I start the
> capture, instead. That might explain the EOVERFLOW
> I'm getting when I read the first block.
> I'll give it a try, back to the drawing board...
> 
> 
> > I'm usually recording full transport, so I need
> > to try to do this on 1 pid
> > only if this happens as well.
> 
> The HD3000 card would still need to transfer the
> entire stream across the PCI bus, it doesn't do
> any hardware filtering afaik. So I don't see why
> setting the PIDs would make any difference to how
> it behaves.
> 
> Cheers,
> Peter.
>
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