Pixel accurate output to SDI?

[samsc]

just to make things a little more complex - sdi isnt 768x576 its 720x576? - non square pixels - i believe?

its a long and complex scaling chain -

what is the resolution of your output led wall? - in pixels - i just did a show with this signal path - but the output was something like 640x366 pixels - taking an sdi input-

[OlliR]

The native LED resolution would have been 1536 x 96 pixels...
...it would have been a four row split on a PAL-canvas - would have done that with four mixes on one screen and Offsets.

Catalyst video content on this LED strip was cancelled this morning - so I don´t have to worry about this any longer for now...

I am not an SDI expert but as far as I know every frame in PAL-SD-SDI consists of 864 x 652 pixels total image size.
Depending on your hardware 720 x 576 or 768 x 576 pixels will be used as active picture area...

Olli