I feel this is a stupid question, but since I'm stuck in it... let's ask anyway

How can I exchange channels in a single convert command?
Code: Select all
convert SDIMa_19045_16bit_master.ppm -channel Red -fx b -channel Green -fx r -channel Blue -fx g +channel SDIMa_19045brg_16bit_master.ppm
Code: Select all
convert SDIMa_19045_16bit_master.ppm -channel Red -fx 'u ; b' -channel Green -fx 'u ; r' -channel Blue -fx 'u ; g' +channel SDIMa_19045brg_16bit_master.ppm

Suggestions?