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.) ---------------------------------------- > 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 > > _________________________________________________________________ Windows Live™ SkyDrive™: Get 25 GB of free online storage. http://windowslive.com/online/skydrive?ocid=TXT_TAGLM_WL_SD_25GB_062009-- 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
