Date: Sat, 4 Oct 1997 20:03:39 -0300 (EST) From: Joao Carlos Mendes Luis <jonny@coppe.ufrj.br> To: multimedia@freebsd.org Subject: bktr -> NTSC - PAL/M Message-ID: <199710042303.UAA06680@gaia.coppe.ufrj.br>
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Hi, I finally managed to make my WinCast/TV tune PAL/M in FreeBSD. But it has been done in kernel defaults, disallowing the use of a composite video NTSC camera for videoconferencing aplications. Also, the composite video input could also be used with other formats, independently of the tuner. I think that the best approach is to add an ioctl to change video input format. Changing between NTSC and PAL/M is not a problem, I'll try to get a prototyype this weekend. But changing between NTSC (525 lines) and traditional PAL formats (625 lines) could be a problem. I could limit the driver to accept format changes only between same resolution ones. Is this an acceptable restriction ? It's easy to see from the sources that this driver was adapted from the existing meteor driver. I know nothing about the meteor card, but I think that these similarities are restricting the features of the BrookTree (wonderful) chip. Should we limit frame grabber features to the commom ones, or should we use every possible feature available and let the user level software select which ones to use ? Jonny -- Joao Carlos Mendes Luis jonny@gta.ufrj.br +55 21 290-4698 jonny@coppe.ufrj.br Universidade Federal do Rio de Janeiro UFRJ/COPPE/CISI PGP fingerprint: 29 C0 50 B9 B6 3E 58 F2 83 5F E3 26 BF 0F EA 67
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