I want to archive footage out of vegas in the 720p AVI cineform preset, works well and will open and play nice in QT.
But I am not able to convert/export this file in QT pro to a M4v or for that matter any of the QT/pro presets Apple TV, Iphone. Sound works, the picture is just static outlines.
Any way to export this file from QT pro?

I can't think of any reason why that might be. File a trouble ticket so support can investigate.

i had like the same issue to convert an avi cineform file to QT using QT pro convert function.
that was with a cineform avi file rendered with "High optimized" quality.
when changing to "High" only, i was able to convert the file to QT mp4 file.