Questions and postings pertaining to the development of ImageMagick, feature enhancements, and ImageMagick internals. ImageMagick source code and algorithms are discussed here. Usage questions which are too arcane for the normal user list should also be posted here.
We have not reviewed the DPX specification recently but we recall the format supports up to 8 channels but only one image per image file. You'll need ImageMagick 6.5.1-4 beta (available sometime tomorrow) for this command to work properly: