jomo / pngextract

Extract embedded PNG images from (binary) files

PNGExtract

Extract PNG images from (binary) files

Usage

pngextract <binary file> [output filename]

Example output

$ pngextract binary.bin

Found PNG #0
PNG written to binary.bin.0.png
Found PNG #1
PNG written to binary.bin.1.png
done

$ pngextract binary.bin output

Found PNG #0
PNG written to output.0.png
Found PNG #1
PNG written to output.1.png
done

License

WTPL

pngextract's Issues

Invalid argument @ io_fread on large files

Having a file that is larger that 2 GB (which seems to be a limit for File.read at line 48)

when using this script having a error

% ./pngextract assets.bin 
Traceback (most recent call last):
	3: from ./pngextract:46:in `<main>'
	2: from ./pngextract:46:in `loop'
	1: from ./pngextract:48:in `block in <main>'
./pngextract:48:in `read': Invalid argument @ io_fread - assets.bin (Errno::EINVAL)

Not familiar a lot with ruby, is there a way to workaround this? Maybe read file memory-mapped? Or at least in chunks?

I am having trouble downloading this

I attempted to just run the function from the command prompt in the folder the bin and pngextract files where in, I also referenced a different install of pngextract in the path environment variable, How DO you install it.