When I go to burn my 1920x1080p25 timeline as an MPEG 2 Blu-ray disc, I get this message in the Advanced Encoder settings (Main Concept):

And the source audio is actually PCM 48KHz stereo.

I could change to a H.264 Blu-ray template (which accepts my audio as is), but then I need to change the field order to Progressive (since my source footage is progressive - 25p). And one of the contributors mentioned in another thread that you can change an MPEG 2 Blu-ray to progressive, but an H.264 Blu-ray must remain interlaced (for 50i or 25p anyway).

Any comments on the above?

Seamus