i=1; for f in *; do \
    # Create the original resolution version
    ffmpeg -i "$f" -vcodec libwebp -q:v 75 "webp/${i}_original.webp"; \
    # Create the 400x400 version (maintaining aspect ratio)
    ffmpeg -i "$f" -vcodec libwebp -vf "scale=400:400:force_original_aspect_ratio=decrease,pad=400:400:(ow-iw)/2:(oh-ih)/2:color=black" -q:v 75 "webp/${i}.webp"; \
    i=$((i+1)); \
done