Well reading from the /dev/vbi4 device I get clean VBI, and garbled output, while at times the output is clean and exact too. So seems our feeding the saa7127 isn't always working right, but the actual embedded VBI data is clean and good.
So running the vbi work queue from the vsync interrupt may work better? Would we possibly want to have a long string queue to store the vbi to feed to the saa7127, like we may be overwriting before we write to the device? It is amazing sometimes how perfect the output is, then it'll sometimes be complete gibberish, although same length and with alot of extra characters mixed in. Thanks, Chris On Tue, May 10, 2005 at 12:17:13AM +0200, Hans Verkuil wrote: > On Tuesday 10 May 2005 00:06, Chris Kennedy wrote: > > In some shows it's completely garbled it seems, but others it is only > > sporadic, sometimes every 3 seconds, sometimes less often. The first > > testing I did it looked great, but that's more simple CC I guess or > > something, strange how it can be exact sometimes and then garbles on other > > feeds. > > If you capture a feed to mpeg and then play it back several times (under > various CPU loads), do you get always the same corruption or does it differ > each time? Can you indeed relate it directly to the CPU load? > > If it also differs each time, then it's almost certainly a timing issue. If > it > is corrupt in the same way each time, then it is a problem with the VBI > insertion. > > Hans > > > ------------------------------------------------------- > This SF.Net email is sponsored by: NEC IT Guy Games. > Get your fingers limbered up and give it your best shot. 4 great events, 4 > opportunities to win big! Highest score wins.NEC IT Guy Games. Play to > win an NEC 61 plasma display. Visit http://www.necitguy.com/?r=20 > _______________________________________________ > ivtv-devel mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/ivtv-devel -- --- Chris Kennedy / [EMAIL PROTECTED] Engineer KMOS-TV/KTBG-FM Broadcasting Services Department Central Missouri State University ------------------------------------------------------- This SF.Net email is sponsored by Oracle Space Sweepstakes Want to be the first software developer in space? Enter now for the Oracle Space Sweepstakes! http://ads.osdn.com/?ad_id=7393&alloc_id=16281&op=click _______________________________________________ ivtv-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/ivtv-devel
