Decode multiple bpg images at the same time with a python script

You need to self-download bpg decoder from here and put the script under the same folder as bpgdec.exe.

Then run the script like:

python bpgbatch.py {folder}

The script will get all bpg files (end up with .bpg) under the target folder and call bpgdec.exe to decode them. Outputs will be dumped under output/.

If the filename of the bpg file contains unicode-characters that cannot be recognized by bpgdec.exe (it does happen), the script will automatically create a copy of the file with a filename that all characters, which cannot be encoded under your system encoding format, will be erased, and hand the copy to bpgdec.exe and retry.