Anders Semb Hermansen wrote: > Joe Votour wrote: > >> What it sounds like is that they'd like to use the VBI >> information for syncing the system clock - like NTP, >> but not over the network. >> >> I honestly couldn't say whether this is even possible, >> since I don't know what information is in the VBI. >> > > alevt-date does this. It's in the alevt distribution. > > alevt homepage: > http://goron.de/~froese/ > > alevt-date manpage: > http://goron.de/~froese/alevt/alevt-date.html > > patch to alevt to work with ivtv (thanks to Duncan Webb!) > http://www.linuxowl.com/patches/alevt-1.6.1-ivtv.patch > > alevt-date works here (PVR-350). It prints the time. I did not try it > with the -set option. > > Here it looks like the time captured by alevt-date is about 3-4 seconds > to slow (manually compared to ntp-adjusted clock). > From my earlier tests it seems that different broadcasters' clocks are not particularly accurate, for example, SF1 is very accurate and BBC Prime is about 1 minute 17 seconds slow.
If the broadcasters' broadcasts are synchronized with their teletext clock then it may be better to use the teletext clock than ntp clock. But I haven't checked this. Duncan _______________________________________________ ivtv-devel mailing list [email protected] http://ivtvdriver.org/mailman/listinfo/ivtv-devel
