Date: Wed, 18 Jun 1997 21:50:25 -0400 From: Randall Hopper <rhh@ct.picker.com> To: multimedia@freebsd.org Subject: FPS probs with bt848 driver Message-ID: <19970618215025.30599@ct.picker.com>
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As I mentioned briefly in the last post, I took a stab at fixing FPS in the driver. I got it to where it seems to work OK for single-field, but for double-field, it's still hosed (it didn't work for either case with the old driver). It could sure use the eye of someone more familiar with the Bt848 than I am. To reproduce the problem, run Fxtv 0.43 with "fxtv -fps 1" in direct video mode, and then zoom the window. One of the fields tracks at 1 fps, but the other still cruises at 30fps. My hacked version is up on the fxtv page at: http://multiverse.com/~rhh/fxtv/bt848.970604.tgz. About this version. It's a small mod to the 970424 driver. When running at the default of 30 frames per second, it's effectively identical to the 970424 driver. With fps < 30, it's got some fixes to work right at least for single-field (fxtv height <= 240 pixel rows). Duel-field (rows > 240 && <= 480) is still busted as I described. Also, this modified version turns off temporal decimation for CAP_SINGLEs (freeze frame) so apps can get a good freeze without having to muck with the FPS setting in the driver. Randall
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