Hi Billy, I've been trying to get tvtime to work with a cheap Bt848 card (no tuner) I got with a webcam. I only ever used the card on Windows but I don't see why it shouldn't work.
The bttv and i2c drivers load OK, and tvtime starts OK with options -p -o420 (With -o422 I get a BadAlloc error from the Xv driver - MAJOR=144 MINOR=19) The console window deosn't report any errors, but the output window shows only blue. Also X locks up when I try to quit (Ctrl-C in the console or close the output window) I installed the latest SDL-devel rpm The system is running XFree86 4.2 The GC is i815, xvinfo reports nothing unusual. What do you think? Any debugging tips appreciated. -- Paul ----- Original Message ----- From: "Billy Biggs" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Friday, May 10, 2002 2:50 PM Subject: Re: [Xpert]Using Xv to display odd/even fields from a TV camera > Paul Robertson ([EMAIL PROTECTED]): > > > Now we need to start working with both odd and even fields. If we do > > that with our current software, the picture wobbles up and down. If I > > write some code to adjust the position of the odd field, the picture > > still looks wrong, particularly if nothing is moving in the picture. > > If I write code to reconstitute a full frame by interlacing the odd > > and even fields, then I see nasty artefacts when there is horizontal > > motion in front of the camera. > > If you want the hardware to do all the scaling, it was sort of decided > that we should update the Xv API to tell it if you're giving an odd or > even field, and let it handle the scanline offset. > > Otherwise, you can do the interpolation in software. I wrote an app > that does this, but it's not 'done' yet: > > http://www.dumbterm.net/graphics/tvtime/ > > Linear interpolation as I do there emulates pretty reasonably what > cheap TVs look like. > > We can discuss options further if you like, but Xpert probably isn't > the right place. v4l-list might be better. :) > > -- > Billy Biggs > [EMAIL PROTECTED] > _______________________________________________ > Xpert mailing list > [EMAIL PROTECTED] > http://XFree86.Org/mailman/listinfo/xpert _______________________________________________ Xpert mailing list [EMAIL PROTECTED] http://XFree86.Org/mailman/listinfo/xpert
