Example of how to extract prompt and seed (and other parameters) from PNG files generated by stablediffusion

getpngmetadata.py

import png, pathlib

def getpngmetadata(filename):
    d = {}
    with open(filename, "rb") as fh:
        try:
            for chnk in png.Reader(fh).chunks():
                if chnk[0] == b'tEXt' and b'\x00' in chnk[1]:
                    k, v = chnk[1].split(b'\x00', 1)
                    d[k] = v
        except:
            pass
    return d

for fn in pathlib.Path("out/Default").glob("*.png"):
    md = getpngmetadata(str(fn))
    if len(md) > 0:
        print(f"{fn}: {repr(md)}")

requirements.txt

png