I am running 64-bit linux, but because of Illegal Instruction errors, I have been running the 32-bit version of k2pdfopt-2.53. Unfortunately, the first command above fails after a dozen pages because k2pdfopt cannot allocate enough memory (it fails while trying to allocate a 273 MB buffer). The resident memory usage must have hit the limit for 32-bit programs. I have 24 GB of RAM in the system, so this is a frustrating roadblock.
The memory usage for that first command is way higher than for the command given in post #6. Is it "-ocrd p" that causes the usage to skyrocket?
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