[Petteri Evilampi] “If it is 25p I would de-interlace all other materials and make this a progressive project.”
But SD is interlaced so why deinterlace all the HD material? I would convert the 720 to 1080 50i so that you also have a broadcast compatible HD project if you ever need it and it will downconvert nicely to SD. I don’t know if the Decklink downconvert is better with the Extreme, but I have just changed from Decklink ProHD to Kona3 and the downconverts are much better.
I don’t use compressor for downconverts as kona is reatime to digi beta.