On Mon, Sep 21, 2009 at 09:52:38PM -0300, Mauro Carvalho Chehab wrote: > Em Tue, 22 Sep 2009 01:37:51 +0300 > "Aleksandr V. Piskunov" <aleksandr.v.piskunov@xxxxxxxxx> escreveu: > > > Is xc2028 tuner able to autodetect/handle different sound carrier standards > > without being spoon-fed precise input system information using module param > > or ioctl? > > > > Got an ivtv board here (AverTV MCE 116) with xc2028 and cx25843. > > > > When I specify a generic standard using 'v4l2-ctl -s pal', xc2028 loads > > firmware specific to PAL-BG, so if there is an PAL-DK or PAL-I signal on RF > > input... nice picture but no sound. Setting a more precise standard like > > 'v4l2-ctl -s pal-dk' fixes the issue, but other PAL-BG or PAL-I channels > > loose sound. > > > > Bttv board with a tin-can tuner sitting on the same RF source autodetects > > PAL-BG, PAL-DK and PAL-I without any manual intervention. > > > > So any voodoo tricks to get the autodetection running? > > No, sorry. It requires specific and different firmwares based on your video > standard. I suspect that it is due to some firmware limiting size, since newer > products from Xceive, like xc5000 don't have such troubles, but this is just my > guess. Mmm, tested that tuner under windows, it autodetects all 3 sound carrier sub- standards instantly: PAL-BG, PAL-DK, PAL-I. In order to test, I connected ancient Panasonic VCR that has a built-in tuner and can output video to RF-OUT on fixed frequency using PAL standard. Sound carrier frequency can be choosen using hardware switch BG, DK or I. So under windows: tuner produces clear audio in BG, DK and I, hardware switch can be toggled on fly, audio never stops, only a few miliseconds of static on switch. Under linux: audio only works if driver is set to use specific audio carrier sub-standard AND same is selected on PVR. (not to mention extremely unreliable PAL-DK detection by cx25843, only works 50% of times, but thats another issue) Either a more generic firmware exists can be uploaded on xc2028.. or several can be uploaded at once. Any xc2028 gurus out there? -- 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
