Date: Wed, 16 Apr 1997 23:18:07 -0400 From: Randall Hopper <rhh@ct.picker.com> To: "Louis A. Mamakos" <louie@TransSys.COM> Cc: Amancio Hasty <hasty@rah.star-gate.com>, multimedia@freebsd.org Subject: Re: Bt848 Missing frames fix Message-ID: <19970416231807.09430@ct.picker.com> In-Reply-To: <199704170244.WAA09974@whizzo.transsys.com>; from Louis A. Mamakos on Wed, Apr 16, 1997 at 10:44:37PM -0400 References: <19970416181855.55604@ct.picker.com> <199704170018.RAA00426@rah.star-gate.com> <19970416203838.49588@ct.picker.com> <199704170244.WAA09974@whizzo.transsys.com>
next in thread | previous in thread | raw e-mail | index | archive | help
Louis A. Mamakos: |Also, as I've mentioned to Randall, I think that the even/odd fields are |interchanged. Someone else mentioned this before, and it seems |noticable if you look at text and graphical objects on the tv broadcast. |I recall looking at this a little while ago, and I thought that the |way the RISC program were being built had the wrong field (even or odd?) |starting off in the memory buffer. Is it just me, or is anyone else |noticing this? Just mailed Louie regarding this in another off-line thread we're on, but this is likely because fxtv isn't switching down to one field only when capture rows is <= CIF (240 for NTSC), so it's blasting both the odd and even frames right on top of each other 30 times a second. Can create some interesting aliasing artifacts but it does yield a more fluid video window. To add in this behavior for experimentation, edit tvcapture.c, search down for ODD, and uncomment that if statement. It's in there; just disabled. Maybe that should be the default (?) Randall
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?19970416231807.09430>