ImageMagick's convert command, using some other parameters, is what did it for me. Here's my batch Bash script solution that divides the task across multiple processes to make use of all your cores! Modify as needed.
ImageMagick's convert command, using some other parameters, is what did it for me. Here's my batch Bash script solution that divides the task across multiple processes to make use of all your cores! Modify as needed.