How can I convert a very large Portable Pixel Map (
ppm) file into a
png on MacOS?
I have a massive
ppm image on my computer. The file is ~70 GB and I need to convert it to a png which would make it ~100 MB. I have cleared up enough space (>70 GB) on my machine to complete the conversion but am having some issues.
What I Have Tried
Open image in preview and export to png
Preview refuses to show the image and instead just shows a black square. When I try to export it tells me that the exported file will be zero bytes. So... no dice.
Use ImageMagick to convert the file from terminal
This actually runs and tries to convert the file, but problems arise after about a minute of computation. First, my computer freezes then after a minute or two restarts because of a kernel panic.