Hi Mike, thanks for the information so far.
If I can do anything to help to debug this, just tell me. I am software developer myself, but I don't have any knowledge about this topic. My personal first priority would be to find a workaround to reliably initialize the tuner correctly during startup. Currently I do: - tune to an analog frequency - record 5 seconds - run a dvb scan Yet I still get the problem with videos recorded afterwards. When I do a dvb scan manually afterwards it somehow fixes itself. I have no idea why the automatic approach of doing the scan would make any difference. (I pipe the output to a file during startup, so I am definitely sure that the dvb scan is done) regards, Martin On Sun, 2011-01-23 at 20:28 -0600, Mike Isely wrote: > On Sat, 22 Jan 2011, Martin MAURER wrote: > > > Hi, > > > > Investigating a little further I found that it sometimes gets better > > when I call "/usr/bin/scan at-official" (doing an dvb scan). > > For some reason the analog video is then perfectly fine. I will check if > > it remains fine, but first tests show that it does. > > > > Anyways, adding this to my startup script didn't help for some strange > > reason (and yes, I checked that is executed correctly) > > > > regards, > > Martin > > Martin: > > In *theory* doing something to the DVB side should not affect the > quality of the analog side. In reality however, the two sides share the > RF tuner, which might suggest that the analog side of the V4L-DVB driver > for that RF tuner might not be setting up the chip properly. The > pvrusb2 driver, being a "bridge" driver in V4L-DVB terminology, > delegates handling of a lot of the hardware to other drivers within > the V4L-DVB subsystem. I'd suspect a misbehavior in the tuner's driver. > Making matters worse however is that Hauppauge has a habit of swapping > out tuner sections within different manufacturing runs of the same > device. So reproducing this doesn't just require another HVR-1900, but > an HVR-1900 with the same tuner in it... > > Unfortunately I don't have any HVR-1900 to test against (I'm in the > USA). So I'm kind of stuck here. > > Can anyone else here with an HVR-1900 (especially if you are using PAL) > reproduce this behavior? > > -Mike >
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