I've tested LibRaw-0.19.5/bin/dcraw_emu.exe on some FujiFilm RAW files without any command line options.
I've obtained unexpected output for XF10 model. With the command:
the generated .ppm output had resolution only 1470x40 pixels.
However, e.g. for X-A3 model:
the generated .ppm output had resolution 6016x4014 pixels.
Fujifilm XF10 is not in
Fujifilm XF10 is not in LibRaw 0.19 supported camera list: https://www.libraw.org/supported-cameras
It is supported in current public snapshot (https://www.libraw.org/supported-cameras-snapshot-201903 ), please upgrade to it.
-- Alex Tutubalin @LibRaw LLC