On Wed, 2016-03-23 at 15:45 -0400, m.roth at 5-cent.us wrote: > Phil Wyett wrote: > > On Wed, 2016-03-23 at 15:16 -0400, m.roth at 5-cent.us wrote: > >> Phil Wyett wrote: > >> > On Wed, 2016-03-23 at 10:26 -0400, m.roth at 5-cent.us wrote: > >> <snip> > >> >> > > >> >> > What is the make/model of the card? > >> >> lspci says: > >> >> Brooktree Corporation Bt878 Audio Capture (rev 11) > >> >> > > >> >> > Are you supplying options when loading the bttv module? > >> >> > >> >> On and off, I've been googling to find if there's something I can > >> tell > >> >> it,or the kernel on boot. Currently, I have, in /etc/modprobe.d/bttv: > >> >> options i2c-algo-bit bit_test=1 > >> >> options bttv gbuffers=16 card=98,98,98,98,98,98,98,98 > >> >> radio=0,0,0,0,0,0,0,0 tuner=4,4,4,4,4,4,4,4 chroma_agc=1 combfilter=2 > >> >> full_luma_range=1 coring=1 > >> > > >> > The options line 1 is used widely and only worth changing if all else > >> > fails. > >> > > >> > The second options line option of combfilter by docs indicate there is > >> > no 2 option and is enabled by default, so you can remove that option > >> to > >> > test. > >> > > >> > I would enable two possible compatibility options and see if that > >> helps. > >> > > >> > triton1=0/1 - for Triton1 (+others) compatibility. > >> > > >> > vsfx=0/1 - yet another chipset bug compatibility bit > >> > > >> > The triton1 insmod option sets the EN_TBFX bit in the control > >> register. > >> > The vsfx insmod option does the same for EN_VSFX bit. If you have > >> > stability problems you can try if one of these options makes your box > >> > work solid. > >> > > >> > Source: > >> http://xawdecode.sourceforge.net/aideUS/htmlpage/BTTV-param.htm > >> > > >> > >> Ok, I've been doing some research, partly refreshing my memory, since we > >> bought these 2-3 years ago. As you note, above, it *says* it's an iTuner > >> Spectra8; *however*, when I look at bttv-cards.c, what I see is that > >> *it* > >> thinks that such a card has *one* video and one audio. In fact, this is > >> a > >> Bt878, and it has *four* inputs for each, with four chips on the card, > >> one > >> for each channel. The nearest thing to it *appears* to be a Provideo > >> PV150, card=98 (which is why I have that card= line in the bttv.conf). > >> > >> Now that I'm thinking about it, and while googling, I looked for the > >> provideo 150, and what *should* have been the link took me to one for a > >> provideo 950, with *16* inputs. Does anyone have opinions on: > >> 1. should I change the card-, radio=, and tuner= to only have four, > >> instead of 8, values? I realize that it multiplexes for 8, but.... > >> 2. What is "coring"? > >> > >> mark > > > > Hi Mark, > > > > It did specify spectra 8 in your lspci output. Below is product page. > > > > http://www.ituner.com/spectra.htm > > > > In my research I did find this related page. > > > > http://www.linuxconsulting.ro/spectra8/ > > > > This does state that with latest internal driver, it is detected and > > works as the ProVision 150. The card=98,... is correct. > > > > The matter of reducing all the settings to 4 rather than 8 may help. > > > > coring is a luma setting. See: > > > > https://www.linuxtv.org/wiki/index.php/Bttv#insmod_Options > > > > Not sure and someone else maybe can shed better light on the setting. By > > default it is disabled and I would tend to think it can be removed. > > > Any thoughts on the number of buffers? > > mark Hi Mark, You have the setting of 16 which maybe correct for how many feeds you are taking/processing. If less I maybe tempted to drop it to the default 8. If the device is running as close to or at default and no hickups - all the better. :-) Regards Phil -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 836 bytes Desc: This is a digitally signed message part URL: <http://lists.centos.org/pipermail/centos/attachments/20160323/1db00a13/attachment-0004.sig>