pfshdrcalibrate 1.8.5 will only return blank (black) streams.
Input is 16bit tiff files converted from 14bit cr2 files [Canon G10].
Usage:
pfsinhdrgen image.hdrgen | pfshdrcalibrate -r gamma -b 16 -c none | pfsview
1.8.4 = Nice image
1.8.5 = Blackness
Usage:
pfsinhdrgen image.hdrgen | pfshdrcalibrate -r gamma -b 16 -c none | pfsout image.exr
1.8.4 = Usable exr ~50mb
1.8.5 = Broken exr ~256kb