Cannot run graphicsmagick parallel

Question

I want to run a resize job in parallel with gnu paralllel:

ls *.*  | parallel gm convert -gamma 0.454545 -strip -filter Lanczos -resize 1280x1280> -gamma 2.2 -format png \"{}\" \"./out/{.}-huge.png\"

It gives an error:

gm convert: Unable to open file (2.2) [No such file or directory].

So how do I escape ">" properly?

Answer 1

Something like this:

parallel gm convert -gamma 0.454545 -strip -filter Lanczos -resize '1280x1280\>' -gamma 2.2 -format png {} ./out/{.}-huge.png ::: *

Or:

ls | parallel gm convert -gamma 0.454545 -strip -filter Lanczos -resize '1280x1280\>' -gamma 2.2 -format png {} ./out/{.}-huge.png

(Apart from filenames containing \n it is actually safe to pass ls to GNU Parallel: It will do the quoting of special chars).