Garrett

Brilliant, hadn't thought about using the recolor command to accomplish the same thing; it does indeed work with mogrify on 12-bit DPX's, so I'm in business. As far as the swap-sample modifier, it seems to be restricted to bit depth and not packing method. It worked with 10-bit DPX's in both packed and filled (A-style) packing, but would not work with 12-bit DPX's in either packing method. For a little background, these are files generated from a digital recorder attached to a digital cinema camera....

Yes, using the convert command instead of mogrify gives the expected result on a 10-bit DPX. It does not work on a 12-bit DPX, however, which is what I actually have an issue with; is there a reason this option is limited to 10-bit DPX's? Just to clarify: when you mention adding explicit options on read or write only, do you mean that can be invoked from the command line currently with the proper instructions, or something that needs to be integrated in a future release of GM?

dpx:swap-samples not functioning in 1.3.35?