Clip properties don’t reveal much!
The XENA captured files show 24 bit colour depth, data rate of 27.1 Mb/sec, 25 frames/sec at 720×576 PAR 1.422 (which is correct PAL widescreen pixel aspect) Codec is AJA Quicktime YUV 4:2:2 v210
The DPS captured file (an AVI) shows 32 bit colour depth uncompressed, with a video track depth of 24 bit. data rate of 29.7 Mb/sec, 25 frames/sec at 720×576 PAR 1.422
Codec is uncompressed avi.
Incidentally, I have also tried XENA capturing avi, and also tried 4:3 aspect, but STILL have the same problem, so who knows?
Anyway, if you do manage to set up a Chroma Key under XENA, let me know if it was successful.
Thanks again for your interest.
RED