Erik Slagter wrote:
I think that one of you has a bttv card and the other one a saa7134-based card (or something similar). The bttv driver allows capture up to 768x576, the saa7134 limits capture to 720x576. Both cards can actually capture up 768x576, but the drivers handle them differently. I assume (should check this though) that if you have the bttv card capture at 768x576, that you get some sort of black borders or borders with noise. If not, it apparently scales the image the other way around...
The captured width (with bttv) is the same for both 768x576 and 720x576. There are only more horizontal samples taken for 768x576.
Anyway, capturing at 720x568 should always be safe (tested on both saa7134 card and bttv card).
Yes. It's ok, but it's nice to crop the video and rescale to something, which is exactly 4:3 resolution to get rid of those silly black bars at the left and right. I usually capture at 720x576 and deinterlace & rescale to 512x384, which is IMO enough for most of TV material.
-- Jindrich Makovicka
