Hi, Am Samstag, den 27.06.2009, 22:36 -0400 schrieb George Adams: > A final wrapup (and again, thanks all of you - I'm indebted to you for your help): > > after booting: > > > v4l2-ctl -F > Frequency: 9076 (567.250000 MHz) > > > ivtv-tune -c 3 > /dev/video0: 61.250 MHz > > v4l2-ctl -F > Frequency: 980 (61.250000 MHz) > > > v4l2-ctl -f 61.25 > Frequency set to 980 (61.250000 MHz) > > v4l2-ctl -F > Frequency: 980 (61.250000 MHz) > > > v4lctl setchannel 3 > > v4l2-ctl -F > Frequency: 0 (0.000000 MHz) > > Conclusion: I'll stick with ivtv-tune or v4l2-ctl and ignore the misbehaving v4lctl > > Hermann: Thanks, but I think you're mistaking the v4lctl "setstation" command (which relies on .xawtv) and the "setchannel" command (which does not, at least according to the man page.) I can for sure tell, that, if I rename/remove my .xawtv, "setchannel" does not work anymore and I see exactly what you reported initially. That can be looked up in the code and it also should not matter that I have a dual install of xawtv-3.95 and 4x since both start to exist. Cheers, Hermann > > > ---------------------------------------- > > Subject: RE: Bah! How do I change channels? > > From: hermann-pitton@xxxxxxxx > > To: g_adams27@xxxxxxxxxxx > > CC: dheitmueller@xxxxxxxxxxxxxx; awalls@xxxxxxxxx; video4linux-list@xxxxxxxxxx; linux-media@xxxxxxxxxxxxxxx > > Date: Sun, 28 Jun 2009 03:39:05 +0200 > > > > Hi, > > > > Am Samstag, den 27.06.2009, 00:25 -0400 schrieb George Adams: > >> Thanks again to both of you for your help. I gave the no_poweroff flag a try, but didn't see any difference. I also tried a "setchannel 3" during the middle of the encoding session, and also saw no change. > > > > hm, I'm late on the party, but for Gerd's v4lctl try to RTFM. > > > > The "setchannel" options reads from .xawtv. > > > > For me it still works, but issues with tda827x silicon tuners are known > > walking the ioctls. > > > > Cheers, > > Hermann > > > > > >> But I think I've found the problem: > >> > >>> v4lctl setnorm NTSC; v4lctl setfreqtab us-bcast; v4lctl -v 1 setchannel 3 > >> vid-open: trying: v4l2-old... > >> vid-open: failed: v4l2-old > >> vid-open: trying: v4l2... > >> v4l2: open > >> v4l2: device info: > >> em28xx 0.1.1 / Pinnacle PCTV HD Pro Stick @ usb-0000:00:1a.7-1 > >> vid-open: ok: v4l2 > >> freq: reading /usr/share/xawtv/Index.map > >> v4l2: tuner cap: > >> v4l2: tuner rxs: > >> v4l2: tuner cur: MONO > >> cmd: "setchannel" "3" > >> v4l2: freq: 0.000 > >> v4l2: close > >> > >> > >> What? freq: 0.000 ? After finding the ivtv package and compiling its utils, I confirm it with this: > >> > >>> v4l2-ctl -F > >> Frequency: 0 (0.000000 MHz) > >> > >>> ivtv-tune -c 3 > >> /dev/video0: 61.250 MHz > >> > >>> v4l2-ctl -F > >> Frequency: 980 (61.250000 MHz) > >> > >>> v4lctl setchannel 3 > >> > >>> v4l2-ctl -F > >> Frequency: 0 (0.000000 MHz) > >> > >> > >> So mysteriously, it seems like v4lctl is just plain not working. And ivtv-tune, on the other hand, is working just fine. After I do that and start Helix Producer, I see channel 3 just like I had hoped. > >> > >> (strangely, v4lctl can do other things fine, like change the norm from NTSC to PAL. It just can't change the channel.) > >> > >> So, sorry that it went off in rabbit trails of the device powering down and so forth. I wonder what happened to my v4lctl program, though? xawtv itself (running in X) seems to work fine when I tell it to change the channel... > >> > >> > >> > >> > >> > >> > >>> Date: Fri, 26 Jun 2009 09:42:06 -0400 > >>> Subject: Re: Bah! How do I change channels? > >>> From: dheitmueller@xxxxxxxxxxxxxx > >>> To: awalls@xxxxxxxxx > >>> CC: g_adams27@xxxxxxxxxxx; video4linux-list@xxxxxxxxxx; linux-media@xxxxxxxxxxxxxxx > >>> > >>> On Fri, Jun 26, 2009 at 7:50 AM, Andy Walls wrote: > >>>> I use either v4l2-ctl or ivtv-tune > >>>> > >>>> $ ivtv-tune -d /dev/video0 -t us-bcast -c 3 > >>>> /dev/video0: 61.250 MHz > >>>> > >>>> $ v4l2-ctl -d /dev/video0 -f 61.250 > >>>> Frequency set to 980 (61.250000 MHz) > >>>> > >>>> > >>>> Regards, > >>>> Andy > >>> > >>> Hello Andy, > >>> > >>> I had sent George some email off-list with basically the same > >>> commands. I think what might be happening here is the tuner gets > >>> powered down when not in use, so I think it might be powered down > >>> between the v4l-ctl command and the running of the other application. > >>> > >>> I have sent him a series of commands to try where he modprobes the > >>> xc3028 driver with "no_poweroff=1", and we will see if that starts > >>> working. > >>> > >>> Devin > >>> > >>> -- > >>> Devin J. Heitmueller - Kernel Labs > >>> http://www.kernellabs.com -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
