ZoneMinder Forums

I'm running a single-chip bt848a (with a mux) and three cameras going thru it. I can get monitors on all three to work in ZM, if and only if they have exactly the same colour-depth and resolution settings.

If I change the rez, I get horribly distorted images, like it's lost sync or something. If I change the colour mode, I get what looks like an interlaced picture with one of the fields missing!

Any ideas? Is it even meant to support different resolutions on different channels of the same /dev/video device?

cheers

ant

Hi Ant,

No-one mentioned anything about different resolutions on a single chip card since I started and now two of you come along at once :) There is another thread <a href="http://www.zoneminder.com/forum_general ... e">here</a>. I think essentially multiple resolutions are not intended to be supported as source switching only allows you to change the format (ie. PAL, NTSC etc). The alternative is to resize the window each time which may be feasible but might be a bit messy and/or slow. The other thing is that the buffer size is set on the first monito initialisation so that mightnot like different sizes. I'll give it a go soon though if I can and we can see. In the meantime your distortion is probably down to the fact that an image n pixels wide is being overlain onto a buffer expected to contain an image (n+m) wide so the line starts are not correctly lined up.

In essence my recommendation is, if you can, keep all inputs on one chip the same size and palette.

Phil,

Ah, thought that might be the answer. No bother, they can all stay at the same res.

cheers

ant